I agree - Loose them freekin pellets.I've used Clean Shot powder for 3 yrs in a Knight .45.Love It.It's now sold under the name "American Pioneer Powder".I use clear plastic speed loaders with powder increments marked on loader.You can clearly see exactly what charge your using every time.Don't know anything about Triple 7.

1.5" At 100 Yrds.Nothin wrong with that.Alot of center fires can't do much better!

You might consider going to a conical bullet in that gun.I use a TC maxi(conical)in my Thompson .50.I can do 1.5-2" groups at 100yrds all day with that round.Mucho easier to load than any sabot.

Any way - whatever you use - Good Luck,and welcome to the MB.Later AL