Savage, Ruger or one of many AR-15's really no bad one's.....your choice....
Bullets are a different....
Best bullet for deer in the 450 Bushmaster....Cutting Edge Bullets 160 gr. flat Base Copper Raptor....https://cuttingedgebullets.com/452-160gr-flat-base-raptor
I have been using it for 4 years most deer DRT one 185 lb. dress buck shot at 183 yards ran 30 yards.
In a AR-15 20" barrel 2668 fps at 15'
In a 18" Savage 16 2930 fps at 15'
Sighted in 2" high at 100 yards is 2" low at 200 yards 7" low at 250 yards 16" at 300 yards....this is not calculated...shot off a bench....
Black Butterfly Ammo factory loads CEB 160 gr. "Screamer" to safe AR-15 pressure 2775 fps.....https://www.blackbutterflyammunition.com/pages/450-bushmaster-160-gr-flat-base-raptor-screamer
Remington 450 BM ammo is junk have yet to see or hear better than 2" groups at 100 yards....https://www.remington.com/ammunition/centerfire-rifle/premier-accutip-450-bushmaster
A properly constructed "Non-Conventional" mono-metal bullet that is lighter in weight compared to a "Conventional" cup-core bullet is going to preform better. You can get higher velocity = flatter trajectory less hold over at longer ranges, less recoil.
A copper or brass bullet will weigh around 35% less than the same profile of a copper-lead bullet. A CEB 160 gr. Raptor and a Hornady 250gr. are very close to the same length. Also a copper or brass "Non-Conventional" bullet has no limit on the velocity it can be shot. Every cup-core bullet has a velocity limit, we all know what happen pushing one too fast or to close of impact.
Hornady 450 BM 250 gr. FXT is a very poor bullet to shoot deer with....short range it comes apart you need to avoid bone...long range poor expansion you need to put it on bone...
I have shot 1000's of bullets in "wet paper media" in every caliber from .17"-.50" to test penetration and expansion. There's not 1 cup-core bullet made today I would shoot a game animal with, varmints I have no problem.
