CowTown Cop’s has posted a range report on his recent “Patrol Carbine” training. Well worth a read.
Our range was never intended to be used as a rifle range. It is 50 yards deep and the backstop is rated for pistol rounds. So we have to use this funny little blue bullet ammo that I despise. Its called SRTA which stands for short range training ammunition. Its a 3.6 grain plastic projectile that is traveling at 4350 fps at the muzzle. It requires you to use a straight blow back M2 training bolt in your AR. I
More here.