I recently bought a T/C Prohunter in Muzzleloader configuration and a Leupold Ultimate Slam scope.
I was at the range today and got it hitting paper at 50yrds then moved up to 100yrds to zero in the bullseye. I also started second guessing myself at what elevation and windage adjustments needed to be done after much frustration because no adjustment seemed to work.
I went back to 50yrds and seem to shoot groups 6" to the left and 5 inches down.
To correct this I have elevation marking on the scope U for up in one direction and windage marking on the scope R for right in the other direction.
Looking at the picture above. Do I adjust the elevation in the up direction to bring my hits up or do I adjust down to bring my elevation crosshair down to meet the hits? The same with the windage, do I adjust the windage to the right or do I adjust left to bring my windage crosshair left to meet the hits?
I unfortunately also realized that the increments are 1/4 MOA at 100yrds. So at 50yrds it should of been doubled.

Maybe that is what was the root of the problem as well. But still wouldn't account for the problems I had a 100yrds.
But before I head out to the range again I'd like to put my second guessing to rest as which way should I go adjusting my scope to bring my hits up 5" and to the right 6" at 50yrds.
Oh I'd like to add that I was using Hornady's SST sabots with 3 777 pyrodex. And varied cleanings from each shot to up to 3 shots to see if there was a difference. I was shooting decent groups just couldn't zero it in.
Any help would be appreciated. Thanks - George