I have used PP in .45acp loads with 185gr jhps. I had the same reaction some have mentioned when firing in my Kimber: lots of flash, seemingly louder report, and a bit more felt recoil than any commercial loads. It felt about like some Rem 185gr +p Golden Sabre loads I have fired. Seems odd as all press and manufacturer text points towards higher velocities with lower chamber pressures than other powders. Didn't seem to batter the gun much more, but definitely roars with a little more authority. The flash is more than I prefer, so the remainder of the pound I bought will sit on the shelf.
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