what kind of revolver do you have? like rr i havent had a 41 for a long time. i used to use AA #9 in mine. dont think its available anymore. i had a ruger redhawk and it would handle some warm loads close to the 44 mag. now i have the 44 mag. check with your loading manual to get loads for those powders you have and start with the middle of the loads and work your way up toward max. just be careful when getting near max. good luck.