One of the powders I use for 300 blk is, 2400 which tended to flatten primers quite a bit. For murom's they would pierce regularly.
The ambient temperature is quite low right now but, I ran federal and murom Spp To near max charge and everything looked fine. I forgot my tripod though, so I couldn't check velocity.
The ambient temperature is quite low right now but, I ran federal and murom Spp To near max charge and everything looked fine. I forgot my tripod though, so I couldn't check velocity.