If I remember correctly the recommended load for a .50, .54 and .58 is 70 grains and that is the regulation with round ball. I don't know for certain about the .72. I owned a .50 that I was getting ready for Africa. My best load ended up being 120 grains of FFg with a 400 grain conical and a 435 grain sabot. I added musket cap ignition and a kick killer pad to keep it from slipping off my shoulder and recoiling into my upper arm. I fired the gun at that level about 20 times and witnessed no ill effects.... but these guns are not designed for massive charges and while they may hold up for awhile they were never manufactured for truly heavy dangerous game loads. I know some hunters who have gone after black bear and elk with them and had good luck but the powder charge levels were around 110 grains. I'm not knocking your gun. But I am recommending that you carefully consider how far you want to push your gun. A good double muzzleloader for dangerous game loads will normally cost at least $2,500. Such guns like those made for October Country are much more massive and can stand up to 150-grain + charges. Proceed carefully or you might ruin a fine gun. I ended up taking a custom double to Africa and leaving the Pedersoli home but it has provided good service at the 120 grain charge level.