First, decide what you are expecting from that gun. If you are punching paper, with little interest in hunting, then THE LAST THING YOU NEED is a powder charge that RECOILS.
My .50 cal. has a 39 inch barrel, and my target load is only 60 grains of FFg. Its accurate out to 100 yds. It also only gives me a "Shove" rather than a kick. I can shoot it all day without any bruises on my shoulder.
I heard of a man who had worked out his 100 yd. Point of Aim for his target load, and then shot the same sight setting at 75, 50, &25 yds. He lowered his powder charge at each of the lesser yardages to get the POI to be the same for the shorter distances. He had a business card taped to his stock that listed the powder charge for each of those ranges, so he didn't have to change his sights, nor use " Kentucky" windage to hit his targets.
His lowest powder charge was for the 25 yd. range targets, and it was 27 grains of powder. I don't recall now if it was FFg or FFFg powder. When asked why so small a powder charge- almost inaudible---- he said all the ball has to do to score is make it through the paper target! His rifle was chambered either for a .50 or .54 caliber ball. Again, I don't remember which it was.
The point is that if you want to have fun, there simply is NO reason to be using Hunting loads in a .50 caliber gun, unless that is what trips your trigger! :shocked2: :youcrazy: :blah:
70 grains of FFFg powder is a HUNTING LOAD. And, unless you are expecting to be hunting large bears, don't ever even consider loading that suggested Maximum powder charge of 110 grains.
I know there are people who think they can't hit a barn door without loading lots of powder in their guns, but any trip to a target range during a match will introduce you to the true facts of life. With the right "squib" load, you can take squirrels and rabbits cleanly with your .50 cal. rifle.