Ahh... The story of my life. So what you're saying is basically I had it bassackwards?BobK said:As a matter of fact, you got that wrong. Black powder builds up pressure more slowly.
Progressive smokeless has a lot more breech pressure, and a different shaped burning curve (time vs. pressure).
To add to pumpguns post a little. Clean all the metal parts with lots an lots of HOT soapy water.[b:2rfcsq3q said:pumpgun[/b]":2rfcsq3q]Clean barrel with hot water ASAP (soap optional) then oil. Mineral spirit based nitro solvents WILL NOT remove the corrosive residues left behind from BP and/or corrosive primers.