.400 Legend vs .450 Bushmaster: Which Straight-Wall Wins? (2026)

Last updated June 27th 2026

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Quick Verdict

The .400 Legend and .450 Bushmaster are both straight-wall deer cartridges built for shotgun-zone states, but they trade differently. Choose the .450 Bushmaster for the biggest bore, the most energy, and proven availability, especially for hogs and larger game. Choose the .400 Legend for roughly 20 percent less recoil and a flatter trajectory, making it the friendlier, more shootable deer cartridge for most hunters.

Both cartridges exist to give hunters in straight-wall-only states like Ohio, Indiana, and Michigan a hard-hitting, legal option. The .450 Bushmaster got there first in 2007 with a big .452-inch bore, and the .400 Legend arrived in 2023 to offer similar deer-stopping power with less recoil. Which one wins depends on whether you prioritize raw power or shootability.

.400 Legend vs .450 Bushmaster: Specs at a Glance

Why Both Cartridges Exist: Straight-Wall States

To make sense of this comparison, you have to understand straight-wall cartridge regulations. A number of Midwestern states, including Ohio, Indiana, Michigan, and Iowa, restrict deer hunting in certain zones to straight-walled cartridges rather than traditional bottlenecked rifle rounds. Both the .400 Legend and the .450 Bushmaster were designed to be legal, hard-hitting options in those states.

The .450 Bushmaster pioneered the modern straight-wall AR cartridge, bringing big-bore thump to the AR-15 and bolt rifles. The .400 Legend followed as a more recent answer aimed at delivering similar performance with less recoil. If you don’t hunt a straight-wall state, a conventional rifle cartridge is often the better all-around choice, but for those who do, these two are purpose-built for the job.

.400 Legend Pros & Cons

.450 Bushmaster Pros & Cons

Velocity and Energy

The two are closer in energy than their reputations suggest. The .400 Legend pushes a 215-grain bullet at 2,250 fps for about 2,416 foot-pounds, while the .450 Bushmaster sends a 250-grain bullet around 2,200 fps for roughly 2,686 foot-pounds. The .450 carries more energy, on the order of 250 to 300 foot-pounds at the muzzle, thanks to its heavier, larger-diameter bullet.

In practical terms, both deliver well over 2,400 foot-pounds, which is plenty for whitetail and hogs inside their effective range. The .450’s extra energy and bigger bore matter most on larger or tougher animals, while the .400 Legend’s slightly lighter, faster bullet gives up a little energy for a flatter path and less recoil.

Recoil: The Decisive Difference

For many hunters, recoil decides this comparison. The .400 Legend was designed specifically to hit nearly as hard as the .450 Bushmaster with about 20 percent less recoil, and that’s a meaningful, noticeable difference at the bench and in the field.

The .450 Bushmaster kicks hard, especially in a light rifle, which can build flinch in new or recoil-sensitive shooters and slow follow-up shots. The .400 Legend’s softer recoil makes it easier to shoot accurately, more pleasant to practice with, and a better fit for youth and smaller-framed hunters. If recoil is a concern, the .400 Legend is the clear winner.

Trajectory and Effective Range

Neither is a long-range cartridge; both are brush and timber rounds effective on deer to about 200 yards. Within that envelope, the .400 Legend’s lighter, faster bullet shoots a little flatter than the heavy, slower .450 Bushmaster, which drops more steeply at distance.

For typical straight-wall-state shots inside 150 yards, both are easy to hold dead-on with a simple zero. If you expect shots toward the 200-yard end of their range, the .400 Legend’s flatter path is a slight advantage, but the difference is modest and neither should be stretched much past 200 yards on game.

Bore Size and Terminal Performance

The .450 Bushmaster’s .452-inch bore is the bigger hammer, throwing a heavier, wider bullet that dumps more energy and crushes more tissue on impact. For hogs, the largest deer, and tougher game at close range, that bigger bore and extra energy give it an edge in terminal authority.

The .400 Legend’s .400-inch bore is still a substantial deer-stopping projectile, and with good expanding bullets it kills whitetail cleanly and decisively. The difference matters most at the margins, on the biggest, toughest animals, where the .450’s extra mass and diameter buy a little more insurance. For average whitetail, both are more than enough.

Ammo Cost and Availability

The .450 Bushmaster has the edge here, with more than fifteen years on the market, a broader selection of factory loads, and wider availability on shelves. It’s the more mature of the two, which makes it easier to find and often cheaper.

The .400 Legend’s ammo selection has grown quickly since 2023, with Winchester leading and others following, but it remains newer, pricier, and less common, especially away from a well-stocked shop. Both are still less ubiquitous than a .30-30 or .350 Legend, so it’s smart to stock up on whichever you choose ahead of the season.

Rifle Selection and Platforms

Both cartridges run in bolt rifles and the AR-15, which is a big part of their appeal for straight-wall hunters who want a modern platform. The .450 Bushmaster, being older, has a slightly wider selection of rifles and AR uppers built for it.

The .400 Legend has been adopted quickly by Winchester, Ruger, Mossberg, Savage, CVA, and CMMG, so rifle choice is strong and growing. See our best .400 Legend rifles guide for the top picks. For most hunters, both offer enough rifle options to find exactly what they want in a bolt gun or an AR.

Hunting: Deer and Hogs by Scenario

For a dedicated whitetail rifle, especially for a younger or recoil-shy hunter, the .400 Legend is the smarter choice. It delivers all the energy needed for clean kills on deer inside 200 yards with noticeably less recoil, which translates directly into better shot placement.

For hogs, the largest-bodied deer, and a hunter who wants maximum terminal authority and doesn’t mind recoil, the .450 Bushmaster’s bigger bore and extra energy make it the harder hitter. Both will do either job, but the .400 Legend leans toward shootable deer rifle and the .450 toward big-bore hammer.

Live .400 Legend Rifles on Sale

Live .450 Bushmaster Rifles on Sale

How I Compared These Cartridges

I based this comparison on each cartridge’s published factory ballistics from Winchester, Hornady, and Federal, cross-referenced against the SAAMI straight-wall specs. I weighed the factors that decide a straight-wall hunter’s choice: velocity and energy, the all-important recoil difference, trajectory inside 200 yards, bore size and terminal performance, ammo availability, and rifle and AR platform support.

The central honest point is that these cartridges are closer than their bore sizes suggest, with the real trade being the .450’s extra energy versus the .400 Legend’s lighter recoil. I’ve kept the recommendation grounded in what matters for whitetail and hog hunting in straight-wall states rather than raw numbers alone.

Bottom Line: Which Should You Buy?

Buy the .400 Legend if you want the most shootable straight-wall deer cartridge. Its roughly 20 percent less recoil, flatter trajectory, and ample deer energy make it the friendlier, more accurate choice for most hunters, and the clear pick for youth and recoil-shy shooters who still want real power.

Buy the .450 Bushmaster if you want the biggest bore and the most energy. Its larger .452 bullet and extra punch make it the better choice for hogs, the largest deer, and hunters who want maximum terminal authority and don’t mind the stout recoil, plus it has more mature ammo and rifle support.

For most straight-wall whitetail hunters, the .400 Legend is the smarter, more comfortable choice, while the .450 Bushmaster remains the big-bore hammer for those who want maximum power. Whichever you pick, confirm it’s legal in your zone and stock up on ammo before the season. For more, see our .350 Legend vs .450 Bushmaster comparison.

FAQ: .400 Legend vs .450 Bushmaster