Grill-n-man said:Pyrodex RS will work better than Pyrodex P as the RS gives a better burn and more energy. I even shoot it thru my 50 cal. trapper pistol and it groups better thru it also. Here is some loads than I am currently using thru my 50 cal TC Hawkins - (these are Pyrodex RS loads) 70 grains with a 350 TC maxi hunter or 90 with the same bullet, 90 gives it a little more distance. I have also shot 100 and 90 with a Hornady great plains 385 grain bullets out of several different guns and had great performance. I am going to the range tomorrow to see how the TC Hawkins I use now works with a 275 grain TC maxi hunter and the 385 Hornady great plains bullet with a couple of different powder loads. If you need some info from how they do send me a PM and I will let you know how it works out.