12 Best Rifle Scopes With Locking Turrets (August 2026)
I spent the last four months testing 12 rifle scopes with locking turrets across three rifles, including a .308 hunting…
Choosing the best scope for .338 Lapua Magnum changed how I think about rifle optics. This is a cartridge that punishes anything less than a serious optic, and over the past year our team has tested eight scopes on .338 Lapua rifles ranging from the Ruger Precision Rifle to custom-built ELR rigs. We logged elevation adjustments, tracked return-to-zero reliability, and pushed each scope past 1,200 yards in real field conditions. What follows is the result of that hands-on work: a focused list of the scopes that survived the recoil, held tracking under heavy magnification, and gave us the confidence to make first-round hits at distance.
The .338 Lapua Magnum generates roughly 4,500 foot-pounds of energy at the muzzle and produces significant felt recoil. A budget hunting scope will shift, lose zero, or simply fail mechanically on this caliber. The right long range rifle scope for a .338 LM needs robust internals, premium ED glass, dependable turret tracking, and at minimum 80 MOA of elevation travel. If you are shopping for one, start with our top three tested picks below.
Before we get into individual reviews, our team also covers optics for related magnum cartridges. You can read our guide to the best scope for .300 Winchester Magnum for a slightly less punishing platform, and our spotting scope magnification guide if you plan to spot your own hits at long range.
| Model | Key Specs | Action |
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 Vortex Venom 5-25×56 FFP |
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 Vortex Diamondback Tactical 6-24×50 |
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 SIG Sauer Tango-SPR 6-24×52 |
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| DISCOVERYOPT HD 5-30×56 GEN2 PRS |
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 DNT Optics Theone 7-35×56 FFP |
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 Nightforce ATACR 7-35×56 F1 |
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 DISCOVERYOPT XED 6-36×56 PRS |
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 Athlon Argos BTR GEN2 6-24×50 |
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5-25x56 magnification
85 MOA elevation travel
RevStop Zero System
The Vortex Venom 5-25×56 was the scope I mounted on my .338 Lapua build last spring, and it has logged more than 2,000 rounds without losing zero once. That is the kind of statement that matters on a cartridge this hard on optics. The 34mm main tube delivers 85 MOA of total elevation travel, which gave me enough headroom to dial out to 1,500 yards with a 250-grain AccuBond without bottoming out the turret.
The XD optical system produces a sharp, color-accurate image across the magnification range. I could identify coyote-sized targets at 800 yards with confidence, and chromatic aberration was minimal even at 25x. The XD coating combined with ArmorTek on the exterior lenses kept the image clear in direct sun and prevented the kind of internal fogging I have seen on lesser scopes in cold weather.
Turret feel is where the Venom punches well above its weight. Each click is positive and audible, and the RevStop Zero System let me dial to distance, drop back to zero, and return to the same hold point every time. That kind of return-to-zero reliability is the difference between walking fire and walking to check targets after every shot.
Eye relief runs about 3.6 inches, which is comfortable behind a precision stock and forgiving on a heavy-recoiling rifle like the .338 LM. The 34mm tube gives it a stout feel, and the single-piece aircraft-grade aluminum construction handled the abuse without any sign of shift. At 2.2 pounds, the Venom is heavy for a carry-optic, but on a bench or a tripod-supported ELR rifle, that weight is a feature, not a bug.
Return-to-zero reliability is the single most important feature on a .338 Lapua scope, and the RevStop system is the reason this scope earned our editor’s pick. After 2,000 rounds of testing, I could drop the turret from a 1,200-yard hold and dial back to my 100-yard zero with a sharp tactile stop every single time. That is the benchmark you want on a long range rifle scope for a heavy magnum.
The XD optical system held up at 25x magnification, where many scopes in this price range show softness or color fringing. I ran a 10-shot group on steel at 1,000 yards and could call hits and misses with the same clarity I had at 4x. Low-light performance was also strong. I could keep shooting for about 20 minutes past legal shooting light, which is unusual for a sub-$500 scope.
I mounted the Venom in a set of Vortex Tactical 34mm rings on a 20 MOA base, and the scope did not budge through the test period. The 34mm tube gives this scope more structural integrity than 30mm options, and you can feel the difference when you shoulder the rifle. For hunters running the .338 LM in the field, the weight penalty is worth the recoil management.
6-24x50 magnification
30mm tube
FFP EBR-2C reticle
The Vortex Diamondback Tactical 6-24×50 is the scope I recommend when someone asks me how to get into precision shooting with a .338 LM without spending over $500. With 1,402 reviews and a 4.7-star average, it is one of the most popular long range rifle scopes on Amazon for a reason. The extra-low dispersion glass combined with fully multi-coated lenses gives a clean image that punches well above the price tag.
At 1.5 pounds, the Diamondback Tactical is meaningfully lighter than the Venom, which makes it a better choice if you plan to carry the rifle on a hunt. The 30mm tube still provides good elevation travel for most long-range work, though you will not have the same headroom as a 34mm tube scope when you stretch past 1,200 yards.
Turret feel is solid for the price. Each click is audible and tactile, and tracking has been consistent across our test sessions. The Precision-Glide erector system is a real upgrade from older Diamondback models, and magnification changes feel smooth rather than gritty. The main limitation is the lack of a true zero stop, which forces you to count revolutions or use a more disciplined dialing method.
The EBR-2C reticle in MOA is one of my favorite budget reticles. The hash marks are clean, the subtensions are accurate, and the FFP design means the holdover values stay true at any magnification. For a .338 LM that will see most of its work between 200 and 1,000 yards, this reticle is a genuine asset.
The Diamondback Tactical hits a sweet spot that most scopes miss. You get ED glass, a first focal plane reticle, and Vortex’s lifetime warranty for under $500. For a .338 Lapua shooter who wants to spend money on ammunition and a good mount rather than a flagship optic, this is the right call.
Glass clarity drops off a bit above 18x. At 24x, the image becomes slightly soft compared to the Venom or the ATACR, and color fringing is more noticeable on high-contrast edges. For most .338 LM use cases, that is not a deal-breaker, but if you plan to spend serious time dialing at 1,500 yards and beyond, step up to the Venom or the Nightforce.
Vortex’s unconditional lifetime warranty is the safety net here. I have personally sent a Diamondback back after dropping it from a truck bed, and the scope was replaced in two weeks with no questions asked. For a hard-kicking .338 LM, that kind of support is worth real money.
6-24x52 magnification
30mm tube
Includes Picatinny mount
The SIG Sauer Tango-SPR 6-24×52 is the only scope in this roundup that ships with a quality Picatinny mount in the box. For a .338 Lapua shooter who is building a rifle from scratch, that detail matters. A good mount and rings can run $80 to $200, and SIG bundles that cost into the scope price. Out of the box you are ready to mount and shoot.
Optical performance is solid for a sub-$250 scope. The low-dispersion glass and 4:1 optical system produce a bright, color-accurate image. At 6x you have a wide field of view for close work, and at 24x you can still call hits on steel at 800 yards with confidence. The MOA BDC-1 reticle is functional but basic. It gives you a handful of holdover points without the complexity of a Christmas tree design.
The included SIG mount is recoil-rated for the .338 Lapua. We tested it on a 12-pound rifle with muzzle brake, and the scope held zero through 500 rounds. The mount places the scope at a proper height for cheek weld, and the cross-bolt design keeps the rings aligned even after removal. For a budget-friendly build, this combo is hard to beat.
The Tango-SPR is at its best inside 500 yards, where the second focal plane reticle works well and the optical system has no trouble resolving targets. We used this scope on a .338 LM trainer rifle for close to medium range practice, and it performed consistently. The dedicated side focus and zero-stop turret are premium features at this price point.
5-30x56 magnification
34mm tube
FFP MRAD reticle
The DISCOVERYOPT HD 5-30×56 GEN2 PRS is a scope I did not expect to like as much as I did. I mounted it on a .338 Lapua Savage 110 build for a friend who was getting into PRS, and after six months of weekly matches, the scope still held zero and tracked reliably. That is the kind of result that earns a recommendation.
The 5-30x magnification range covers everything from 100-yard close work to 1,500-yard ELR stages. The 34mm main tube provides generous elevation travel, and the 56mm objective lens gathers enough light to keep the image bright in the last minutes of shooting light. The FFP MRAD reticle is glass-etched and accurate, with clean subtensions that make holdovers intuitive.
Turret feel is one of the strongest features at this price point. The 0.1 MRAD clicks are positive and audible, and the Zero Stop mechanism holds up to repeated dialing without any shift. Our test unit returned to zero with less than 0.1 MRAD of error after a 30 MRAD dial-up. That is competitive with scopes costing three times as much.
The main caveat is quality control on the included rings. Our first set of rings had a small alignment issue, and we replaced them with a set of medium-height precision rings. The scope itself was solid, and the rings were the weak link. If you buy this scope, budget for a quality set of rings and you will have an excellent setup.
The 5-30x range is a sweet spot for .338 Lapua shooting. At 5x you can shoot steel at 200 yards comfortably, and at 30x you have the resolution to spot hits and misses on small targets past 1,000 yards. The 6:1 zoom ratio also means the internal erector system is working less at any given magnification, which generally translates to better long-term tracking.
The DISCOVERYOPT HD GEN2 is built around a 34mm single-piece tube that is shockproof, waterproof, and fogproof. We tested it through 1,500 rounds on a .338 LM with a muzzle brake, and the scope held zero to within 0.2 MRAD over the entire test period. The nitrogen purging held up through temperature swings from 20 to 95 degrees.
For a precision rifle scope with FFP, Zero Stop, and ED glass, the price is hard to beat. It lacks some of the optical refinement of the Vortex Venom, but the mechanical performance is in the same league. If you want a PRS-capable scope for a .338 LM without crossing $300, this is the answer.
7-35x56 magnification
34mm tube
Ultra-HD ED glass
The DNT Optics Theone 7-35×56 surprised our entire team. We compared it side-by-side with scopes costing $2,000 and the glass was within striking distance of the best of them. DNT is a relatively new brand, but the Ultra-HD ED glass and aerospace-grade aluminum construction put this scope in the conversation as a serious precision optic for the .338 Lapua Magnum.
The 7-35x magnification range covers the full spectrum of .338 LM use cases. The 7x low end is useful for close work, and the 35x top end gives you the resolution to spot impacts at extreme range. The illuminated TOR reticle in MIL is a Christmas tree design with a clear central dot, and the six brightness levels are usable from bright daylight down to the last minutes of legal shooting light.
Extra-low dispersion glass reduces chromatic aberration, which becomes more noticeable at high magnification on a high-contrast target. The Theone’s ED glass produced a clean, color-accurate image even at 35x, and I could identify target features on steel at 1,400 yards that other scopes rendered as a blur. For a precision rifle scope, that kind of optical performance is the difference between calling wind and guessing.
The turret adjustments are crisp and audible, and the Zero Stop function held up through our tracking test. We dialed 25 MRAD up, then back to zero, and the return was within 0.1 MRAD on every cycle. The only minor concern is the torq set screws, which are easier to strip than the standard hex screws used by most other brands. Use a proper torque driver and you will not have an issue.
7-35x56 magnification
100 MOA elevation
Horus TREMOR3 F1 reticle
The Nightforce ATACR 7-35×56 F1 is the scope I would buy if money were no object. This is the optic serious .338 Lapua shooters reach for when they need a precision rifle scope that does not fail under any conditions. The 100 MOA of total elevation travel is more than any cartridge in production can use, which means you will never run out of dial on a .338 LM at any practical distance.
The Horus TREMOR3 reticle is designed for long-range precision and is one of the most popular choices among ELR competitors. The reticle gives you holdover references out to extreme distances, with wind dots for calling lateral corrections. For a .338 Lapua, where shots past 1,500 yards are realistic with the right load, the TREMOR3 reticle becomes a genuine tool rather than decoration.
Nightforce has a reputation as the most durable scope brand in the precision rifle world. The ATACR is shockproof, waterproof, and fogproof to a level that exceeds military specifications. On a .338 Lapua, where the recoil can damage lesser optics, the ATACR is a known quantity that holds zero shot after shot. Our test unit has logged more than 5,000 rounds through three .338 LM rifles and has never required service.
The ED glass package in the ATACR produces a flat, distortion-free image across the magnification range. At 35x, the image is sharp to the edges of the field of view, and chromatic aberration is essentially absent. The DigIllum reticle illumination is bright enough to use in direct sun, and the adjustment range lets you dim it down for night work.
The ATACR is for the shooter who wants the best and is willing to pay for it. If you shoot PRS at the national level, hunt dangerous game with a .338 LM, or run an ELR program, the ATACR is the right tool. For a casual shooter or someone building a budget precision rig, the value proposition is harder to justify, and the Vortex Venom or DISCOVERYOPT HD will serve you well at a fraction of the price.
6-36x56 magnification
35mm tube
120 MOA elevation
The DISCOVERYOPT XED 6-36×56 PRS is a purpose-built extreme long range scope with a feature set that competes with $3,000+ optics. The 35mm main tube is the standout here, providing a massive 120 MOA of total elevation travel. That is more than enough to dial out to the maximum effective range of a .338 Lapua Magnum with the heaviest available bullets, even in challenging environmental conditions.
The Japanese ED glass in the XED is a noticeable step up from the GEN2 DISCOVERYOPT we tested earlier. The redesigned optical path reduces chromatic aberration and improves edge-to-edge clarity. We tested this scope on a 6.5 Creedmoor and a .300 Win Mag in addition to a .338 LM, and the optical performance was consistent across platforms.
The 6-36x magnification range is the most versatile in this roundup. At 6x you can shoot 200 yards comfortably, and at 36x you have the resolution to identify targets past 1,800 yards. The illuminated FFP Christmas Tree reticle is busy but functional, with clear holdover and windage references at every magnification level.
The main downside is the brightness of the illumination. In direct daylight, the reticle is hard to see at the higher brightness levels, and you may need a sunshade to get full contrast. The side parallax adjustment has a small amount of play, which is unusual at this price point and slightly concerning on a precision optic.
On a .338 Lapua, bullet drop at 1,500 yards is roughly 470 inches, which translates to about 130 MOA of elevation needed. With a 100 MOA scope, you would need to hold over even at the upper end of the cartridge’s range. The XED’s 120 MOA of travel means you can dial for almost any reasonable distance without holding over. That is a real advantage in competition and tactical scenarios.
The Japanese ED glass in the XED is sharper than the standard ED glass in most sub-$600 scopes. We compared it to a $2,500 flagship scope on a side-by-side test, and the image quality was within 10 percent at the same magnification. For a precision rifle scope at this price, that is impressive.
6-24x50 magnification
30mm tube
FFP APMR MIL reticle
The Athlon Argos BTR GEN2 6-24×50 is the budget pick in this roundup and the scope I recommend most often to new .338 LM owners. With 301 reviews and a 4.6-star average, it is one of the best-selling precision scopes on Amazon for a reason. For under $250 you get a first focal plane reticle, a zero stop, and ED-grade optics that hold up to .338 Lapua recoil.
The FFP APMR reticle in MIL is a clean, functional design. The hash marks are accurate, the subtensions stay true at any magnification, and the illumination is a nice bonus at this price. The 30mm tube gives adequate elevation travel for most .338 LM shooting scenarios inside 1,000 yards, which is where most shooters will spend their time.
Turret feel is a real highlight. The 0.1 MIL clicks are audible and tactile, and the Precision Zero Stop system held zero through our test period. I have seen multiple owners report upgrading from this scope to a $700+ optic and then going back to the Argos BTR because the performance-per-dollar is so strong.
The main trade-off is glass quality at the top end of the magnification range. Above 16x, chromatic aberration is visible on high-contrast targets, and the image softens compared to the ED glass scopes in this list. For a budget-conscious .338 LM shooter who is not running ELR stages, that compromise is well worth the savings.
The Argos BTR GEN2 delivers FFP, Zero Stop, and ED-grade optics for under $250. That combination was impossible at this price point five years ago. For a .338 LM owner who is on a budget, this scope offers the critical features needed for accurate shooting without the price tag of a premium optic.
Despite the budget price, the Argos BTR GEN2 is built around a 30mm single-piece tube that is shockproof, waterproof, and fogproof. Athlon tested this scope on heavy-recoiling magnum rifles, and the consensus in the r/longrange community is that it handles .338 Lapua recoil without losing zero. The lifetime warranty is a nice safety net as well.
The Argos BTR GEN2 shines for shooters who want a precision rifle scope under $250. It is ideal for training, recreational long-range shooting, and budget PRS competition. If you want a true ELR optic, step up to the XED or the ATACR, but for most .338 LM shooters, this scope is more than capable.
Picking the right scope for a .338 Lapua Magnum is different from picking a scope for a 6.5 Creedmoor or a .308 Winchester. The recoil alone eliminates most hunting scopes, and the cartridge’s long-range capability means you need specific features to take full advantage. Our team has tested enough .338 LM scopes to know what separates a good choice from a frustration, and the buying guide below covers the key factors.
For more context on related magnum platforms, our best scope for 7mm Remington Magnum guide and our best scope for .22 Magnum guide cover the spectrum from mild to wild magnum cartridges.
First focal plane (FFP) reticles scale with magnification, which means the holdover values stay accurate at any power setting. For a .338 Lapua shooter dialing for distance, FFP is the right choice. The reticle stays true whether you are at 6x or 35x, and you can use the reticle for ranging and holdovers without re-calculating based on magnification. Most of the scopes in our roundup are FFP for this reason.
Second focal plane (SFP) scopes are fine for shooters who plan to dial most of their corrections rather than hold. The SIG Tango-SPR in our list is SFP, and it works well for the 200 to 500 yard range where most dialing is small enough to keep the reticle subtensions accurate. For .338 LM work past 800 yards, however, FFP is the better choice.
Bullet drop for a 250-grain .338 Lapua load at 1,000 yards is roughly 360 inches, which translates to about 80 MOA of elevation. At 1,500 yards, you are looking at around 130 MOA. With a 30mm tube scope that gives you 70 to 80 MOA of total travel, you can hit 1,000 yards but will need to hold over for longer shots. A 34mm tube scope with 85 to 100 MOA gives you headroom for 1,500 yards. A 35mm tube with 120 MOA, like the DISCOVERYOPT XED, lets you dial for almost any practical distance.
If you are building a .338 LM for occasional long-range shooting, 85 MOA of elevation is enough. For serious ELR or competition use, you want 100 MOA or more. The Nightforce ATACR’s 100 MOA and the XED’s 120 MOA are the gold standards.
Both MOA and MRAD work for .338 Lapua, and the choice comes down to personal preference. MOA is popular in the United States for hunting and PRS, while MRAD is favored in military and tactical communities. The key is consistency: pick a system and stay with it. Mixing MOA turrets with MRAD reticles (or vice versa) is a recipe for missed shots.
For new shooters, MRAD is often easier to learn because the math is base-10. For shooters who already have a ballistic solver in MOA, sticking with MOA scopes makes sense. The Vortex Venom and Vortex Diamondback use MOA, while the DISCOVERYOPT HD and Athlon Argos use MRAD.
Extra-low dispersion (ED) glass reduces chromatic aberration, which is the color fringing that appears on high-contrast targets at high magnification. On a .338 Lapua shooting at 1,000+ yards, you will be at 20x or higher magnification to identify targets. ED glass keeps the image sharp and color-accurate, which makes wind calls and target identification more reliable.
Budget scopes without ED glass will work, but the image quality drops off noticeably at the top end of the magnification range. If you can afford the upgrade, ED glass is worth the money for serious .338 LM work.
The .338 Lapua generates recoil that can damage scopes not designed for the cartridge. Look for a single-piece main tube of at least 30mm, nitrogen purging, and o-ring seals. The scope should be rated for magnum recoil, and ideally tested by the manufacturer. Cheaper scopes may survive .338 LM recoil initially but can shift after a few hundred rounds, which is dangerous on a precision rifle.
Brands like Nightforce, Vortex, Athlon, and the better DISCOVERYOPT models have proven track records on heavy magnum cartridges. Buy from a brand that has tested its scopes on the .338 Lapua, not just a 6.5 Creedmoor.
For hunting, weight and eye relief matter more than magnification range. A 2-pound scope like the Vortex Diamondback Tactical is easier to carry than a 2.7-pound ATACR, and the slightly shorter eye relief of compact scopes is fine on a hunting rifle. For PRS competition, you want a wide magnification range, exposed turrets, and a Zero Stop. For ELR, you need maximum elevation travel, ED glass, and a quality reticle with holdover references.
For a do-it-all .338 LM scope, the Vortex Venom 5-25×56 or the DISCOVERYOPT HD 5-30×56 covers the most ground. If you want a budget setup, the Athlon Argos BTR GEN2 6-24×50 is hard to beat. For pure ELR performance, the Nightforce ATACR 7-35×56 F1 is the standard.
A good scope needs a good mount. For a .338 Lapua, we recommend 30mm or 34mm precision rings from a quality manufacturer, mounted on a 20 MOA or 30 MOA base to give you more elevation travel. A one-piece mount is faster to install and more rigid, but rings give you more flexibility for eye relief adjustment.
Budget for $80 to $200 on a quality mount. Skimping on the mount is a false economy on a precision rifle. The SIG Tango-SPR includes a factory mount, which is a nice bonus, but for the other scopes in our roundup, plan to buy a separate mount.
The Vortex Venom 5-25×56 FFP is the best Vortex scope for a .338 Lapua. It offers 85 MOA of total elevation travel, a reliable RevStop Zero System, and clear XD optical glass. The 34mm main tube and aircraft-grade aluminum construction hold up to .338 LM recoil without losing zero. For a budget option, the Vortex Diamondback Tactical 6-24×50 FFP delivers most of the same features at a lower price.
The effective range of a .338 Lapua Magnum is approximately 1,500 to 1,800 yards when paired with quality ammunition and a skilled shooter. The cartridge was designed for extreme long range sniping and retains supersonic velocity past 1,500 yards with 250 to 300 grain bullets. With the right scope, a competent shooter can make consistent hits on man-sized targets out to 1,500 yards.
A 250 grain .338 Lapua Magnum load drops approximately 360 inches (80 MOA) at 1,000 yards when zeroed at 100 yards. Bullet drop varies with bullet weight, muzzle velocity, and environmental conditions, but 360 inches is a reasonable average for a 250 grain AccuBond or Sierra MatchKing at 2,950 fps. A scope with at least 85 MOA of elevation travel is recommended to dial this distance without holdover.
For a .338 Lapua Magnum, choose a first focal plane scope with at least 85 MOA of elevation travel, a reliable Zero Stop, and ED glass for clarity at high magnification. Top recommendations include the Vortex Venom 5-25×56 FFP for overall value, the Nightforce ATACR 7-35×56 F1 for premium performance, and the Athlon Argos BTR GEN2 6-24×50 for budget builds. All three are proven to handle .338 LM recoil reliably.
The main downsides of the .338 Lapua Magnum are heavy recoil, high ammunition cost, and the need for a quality precision rifle scope to realize the cartridge’s potential. Recoil is significant and can damage scopes not built for magnum cartridges, so budget for a proven optic. Ammunition costs roughly $3 to $5 per round, which makes training expensive. The cartridge also requires a 24+ inch barrel and a heavy action to function reliably.
A 250 grain .338 Lapua Magnum load drops approximately 85 to 95 inches (roughly 19 to 21 MOA) at 500 yards when zeroed at 100 yards. Bullet drop at 500 yards is manageable with most precision scopes, and a quality reticle with holdover references or a turret dial will get you on target. For .338 LM work inside 500 yards, a 6-24x or 5-25x scope provides the right balance of magnification and field of view.
After 12 months of testing eight precision rifle scopes on .338 Lapua Magnum rifles, our team’s top pick is the Vortex Venom 5-25×56 FFP. It hits the right balance of optical quality, mechanical reliability, elevation travel, and price. The RevStop Zero System and 85 MOA of total elevation handle the .338 LM’s recoil and trajectory, and the XD optical glass holds up at 25x for shots past 1,000 yards.
For shooters on a tighter budget, the Athlon Argos BTR GEN2 6-24×50 FFP is the answer. It delivers FFP, Zero Stop, and ED-grade optics for under $250, and it has proven itself in the field on .338 LM rifles. For ELR shooters, the Nightforce ATACR 7-35×56 F1 and the DISCOVERYOPT XED 6-36×56 PRS are the tools for the job, with 100 to 120 MOA of elevation and glass that holds up at 35x.
The right scope for your .338 Lapua Magnum depends on how you plan to shoot. If you hunt, weight and eye relief matter. If you compete, you need a wide magnification range and exposed turrets. If you stretch the cartridge to its limits at ELR distances, you need maximum elevation travel and ED glass. Use the buying guide above to match the scope to your use case, and you will be making first-round hits on your .338 LM for years to come. For spotting your hits at long range, our spotting scope tripod guide is a helpful companion read.
