helz_mcfugly
Member
I have a Bushmaster AR15 M4 with a 16" barrel. right out of the box at 100 yards I was shooting 1 1/2 to 2 inch groups. I free floated the factory barrel and improved my groups to 1 to 1 1/2 inchs. Now Im puting a Bushmaster A3 Varmint Upper with a free floated E.R. Shaw 24" SS Bull Barrel with a 1/9 twist on it.
1. Does anyone have one of these barrels?
2. how much tighter should my groups get at 100, 200 yards?
3. what grain bullet and powder charge does this barrel like to eat?
I have been using hornady 55 grain fmjbt with 21 grains of H322.
here is gun before and after the bull barrel
AFTER
1. Does anyone have one of these barrels?
2. how much tighter should my groups get at 100, 200 yards?
3. what grain bullet and powder charge does this barrel like to eat?
I have been using hornady 55 grain fmjbt with 21 grains of H322.
here is gun before and after the bull barrel
AFTER
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