You'll be fine at 16" if you stick to your stated plan. Plenty of buddies are hunting with 14.5" AR10's. Even out to 600+ yards. Right powder and bullet is the key. A good 150gr will do just about everything you want concerning North American game.
You'll be fine at 16" if you stick to your stated plan. Plenty of buddies are hunting with 14.5" AR10's. Even out to 600+ yards. Right powder and bullet is the key. A good 150gr will do just about everything you want concerning North American game.
I found that I lost about 100 fps of velocity going from a 20" barrel to a 16" barrel in my .308. That's the same as "Snowgetter1" reported in his post above. You'll be fine going to a 16" barrel.
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