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...
Your statement is confusing, if the cartridges were factory loads how did you know they were loaded with 25 grains of H335?
If you have a factory bolt action and it has a short throat, 25 grains of H335 is way over a max load. This was in my earlier posting that upset the class clowns over posting the throat photo.
