All I know, is I've had two times that I've had a 223 case blow, and enough to damage the action and stock....
both times they were factory loaded ammo...
and both times the load was supposedly 25 grains of H 335, with 55 grain FMJ bullets...
I don't bother with H 335 on any loads...
If I am using any flake powder, I took J.Barsness recommendation of TAC.. or good old W 748...and using up the 5 lbs of BLC2 still left over...
and if you are into PyroTechnics, take a round loaded with H 335 and fire it in the dark...it will light up a 12 x 10 area real well...gotta be one of the flashy-est powders around...
and I don't think it is very temp stable at all...
