Thread: How much is over fill in 223

i use bm2 in my 204 its good
i then got a 223 not long ago and started with 2206h 55gr sgk projectiles it was ok but not great so tried bm2 and got better velocity better ES very consistent
a friend is using a powder that bemont arms are selling i think it is called st marks it is a very dense powder and getting very good results
compared to 2206h he was trying before that he has cut his 223 barrel down to 16inches i in 12 twist with a suppressor and is getting just over 3000 fps he could not get that using 2206h