Yeah, it's the same diameter bullet. I use 55 FMJBT for my subsonic reloads.abpt1 said:right above that is
ATF has specifically exempted the following rounds:
5.56 SS109 and M855 NATO rounds, with a steel penetrator tip.
.30-06 M2 AP ammo.
the ss190 is not different at all because it is the same as 5.56 SS109 and M855 :roll: :idea: :arrow: