Why are you making this difficult. It is simple easy. If you have a 50 cal do this. Start at 65 grains, .490 ball, .015 or .018 patch and shoot three. Wipe between each shot. If you do not wipe, your load testing is bad because your shooting different barrel conditions. Shoot the first group, go up 5grs, shoot the second group. If it is like any other 50 cal I have ever shot, it will like somewhere between 65 and 80 grs for punching targets. Forget all this for a hunting load. For hunting, Start at max load and go down 5 on your powder. Your not worried about group size for hunting, just hitting your mark once. Big difference, you just want to know where it hits at 50 and 100. Remember, for you hunting load, the barrel must be in the same condition as it would be if you leave your lodge and go on a hunt.... ie... clean barrel each shot for hunting load test. Use any lube you read about here. They all work.