Well it seems like there are mixed reviews around on shooting 150gr pills outta 300 blk out, just my luck I have about 400 rounds of the Sierra HPBT that i would like to use for paper ammo.. does anyone have any load data for IMR4227,IMR4198 or maybe even Unique? Im not sure but I think somewhere Ive seen or seen mentioned that ppl have used Unique..Im looking to go with IMR4227 bc I originally purchased the powder for my 44 mag and Ive had issues with it leaving unburnt powder behind, since then I have gotten to the bottom of that issue, but i Have LOTS of IMR4227 and would love to use it up on my blk out ammo..thanks for the help.
