3.5 grains of trail Boss and a 180 grain bullet in that small case works for me. easy shooting and very light recoil.
I have read that any .45ACP lead bullet target load will work. That case is simply a .45ACP case with a ,45 Colt rim.
It is NOT a .45 ACP auto rim case. that is a different cat completely.
However it MIGHT be possible to shave the .45 Colt cylinder a bit and re-chamber to use .45 auto rim.
Respectfully submitted
Bunk