It seems like the sabot guns are much more picky as to what they like for a load. I run an old .54 cal. CVA Hawkins with .530 patched round balls. 90 grains of FF, any patch and solvent yields 1" groups at 50 yards, 3" groups at 100 yards. My son runs a CVA Buckhorn in .50 cal., and it took us all fall to find a load that really worked in that gun. We must have tried a good 15 to 20 different combos with that gun to get it to shoot. Ended up with those Powerbelts and Pyrodex. Work with your loads. If time's of the essence for this year, just find and acceptable load, but if you do have time, work, work, work with different combos. You'll likely hit on what it likes. 120 grains of powder seems a bit on the heavy side.
