Originally Posted by phish
on another note, I shot next to a Navy dude in Coalinga who used the much vaunted Mk 262 ammo. He told me he pulled a bullet and found that it uses ball powder, he had no idea what it could be derived from. just some food for thought
There are threads in other gun forums where a few people are guessing out loud (after doing load workup to create ammo with similar characteristics to MK262) that it's Ramshot TAC, or some close blend of it.