i have fired from 180 grain cast to 300 grain cast in 41's.
using unique, accurate, 2400, and 231.
and all around powder for most anything would have to be unique. and i might add 7.5 to 8 grains. More powder if you want higher velocity.
but 8grains seems to fire just about everything.
My Titantium Tracker can get a little unpleasant - even with aftermarket grips - if pushed too fast, but I didn't want to go under 1000 fps.
With the short barrel, porting makes it about 3 1/2 inches, published data isn't much help. I broke out my chrono and tried Lilgun, H 110, CFE.... , all with the 215 gr cast bullets I get from Bob Haley.
I settled on 7.3 grains of Unique which gives me 1050 fps with really small E.S.
