I put a lot of bullets through muzzleloaders through out the year as well as reg rifles and there are fellows capable of shooting tiny groups time after time but a muzzleloader is a muzzleloader.I have never seen one that would shoot 1/2 or less than a inch day after day,time after time or group after group.Its just the nature of the beast.I have shot lots of groups with different muzzleloaders less than an in @100 yds,some less than an inch @200,and some less than 3 in @300 yds,but on the other hand I have shot lots more groups that were over 1 in,and some way,way over.
What I have found out using the same rifle and load you have a moa shooter one day,the next day the same rifle and load you have a +moa.shooter.
I get lucky and get some good groups sometimes.These 3-shot groups were shot the same day using 2 different rifles.