Let me see if I have this right. Instead of buying $30 worth of quality ammo to check this rifle to begin with, a new trigger was bought and installed, and a new barrel bought and installed, and then test fired with the same ammo.Helping a buddy with his AR and the best group we can get is about 3.5-4.5" at 100yds using bulk green tip ammo. New match grade trigger, lapped the rings, and even replaced the 18" barrel. Rings are tightened to spec using torque wrench. Still crap groups. Got to looking at the ammo and some of the cases have small dents and other irregularities. I'm not an AR guy but this rifle SHOULD shoot better than this.
Borrowed another AR and we are getting about the same groups using the same bulk green tip ammo.
Assumption...... bulk green tip ammo is inconsistent at best, crap at worst.
Any suggestions on the next step? Other things to check?
Suggestions on readily available 556/223 varmint ammo that is on the cheap end? All I could find at Academy that wasn't FMJ was $52 for a box of 20 and he is cheap and won't pay that
Original plan was for this to be a SHTF gun, but now he wants to shoot some coyotes with it.
Do I have that right?