I will pay you 10 grand for that muzzle loader right now, that is really awesome. you have a record setting rifle there.

With my best handloaded 308 win's, I feel lucky with with my .75 inch groups and thats with a 15 to 20 fps velocity spread through a chrony. thats means if your Muzzle loader is a 50 cal shooting a saboted 45 cal bullet and getting 1/2 MOA at 100 yards that means roughly your gun shoots through the same exact hole everytime, which would mean you have absolutely no velocity spread? are you sure the last 4 shots of your group didn't just miss the target altogether? because I could see one 45 cal bullet rip a .5 inch hole in a target but not 5 shots . Because with my muzzle loader shot with a 240 gr xtp and 2 pyrodex pellets (100 gr), my velocity spread is about 60 to 70 fps meaning my bullet doesnt leave the barrel at the exact same velocity everytime my best group at 100 yards with my muzzle loader is 4 inches open sights usually its 5 inches or more and 5 holes touching at about a 1.5 inch group with a scope and that was my absolute best most of the time its a 2 to 3 inch group with a scope.

you know if you wanted to blow smoke up our butts hoping we would believe you, you should have said a 1 inch group that I would have probably believed you, but 1/2 inch groups with a Muzzle loader I find very hard to believe because as long as I have been shooting a muzzle loader I have never ever seen that kind of consistancy even shot off a benchrest. maybe if you weighed every charge with a grain scale and trimmed and weighed your sabots so they were all identical and seated the sabot/bullet in the muzzle exactly the same everytime and completely cleaned your gun inside and out between shots, then maybe id beleive 1/2 MOA, but there are tomany variables in muzzle loading to get that kind of accuracy.

there I feel better I had to get that off my chest before my head exploded..........