My Mini-14 has 1911 style buffers on the op rod and gas tube. It will not shoot tula with them on. If I take the buffer off the gas tube it will shoot tula just fine. I prefer and almost always shoot brass cased ammo since I reload. Dont really care for steel cased ammunition.
Incidentely, The mini-14 with both buffers will shoot everything Ive ever put in it without one single issue. That includes all factory and handloaded ammo.Tula is the only ammo that Ive ever tried that would not. I have to admit, I was kinda glad.