Bedfordtec
Member
- Joined
- May 28, 2019
- Messages
- 174
I have a Pre Ban Colt AR-15 carbine with lightweight barrel. 1/7 Twist. Usually I only fire M193 55 Grain Ammo in it. Are there any drawbacks to using M855 Green Tip 62 grain in it such as reduced barrel life. I fired a few rounds and I believe it shot a couple of inches low at 100 yards.Thanks, Bedfordtec