My brother bought a usedAustin Halleck muzzleloader and we tried it out
we used harvester sabots and 44 calsierra 240gr bullets with 80 to 100 grains
of ffg black powder and could not get any grouping at all.
Any body know what shoots best in these guns.
Did I miss the model of the rifle? If this is one of their traditional rifles, you might have a roundball twist barrel. What model and twist in the barrel? I think a better answer could then be given.