The last time I picked up powder all they had was vihta vuori (probably spelled that wrong) n320. I had data for it in the book so I picked up a pound and it works fine but it's sooty. The stuff gets everywhere. After a kupl hundred rounds it actually gets bad enough to cause feeding issues. It's even all over the end of the barrel bushing, in the magazine well, and under the slide. I still have a few hundred rounds worth of the stuff and would hate to waste it. Should I just finish up this can and switch to a different powder or will I be dealing with this no matter what? My 1911 is my only semiauto so I'm not extremely familiar with the quirks of them besides being less tolerant of gunk than my bolt actions.