I went to the range today and about 150 rounds of 9mm through my Kahr P9. I used 75 rounds of sub-sonic ammo from Georgia Arms and 75 rounds of Blazer Brass. Accuracy was pretty much the same and recoil was fairly comperable. The one thing that was totally different was what happened after I pulled the trigger. The Georgia Arms ammo was pretty much flashless, just smokey as heck. Looked like one of those Civil War skirmishes you see on TV. The Blazer Brass on the other hand was pretty much smokeless, however there was a 8 inch diameter fireball just outside the barrel after every round. What causes this? Different kinds of gunpowder?