from what I understand #10 is for ball and cap pistols. most rifles should use number 11 caps...
then again I'm an amateur when it comes to muzzle stuffers
between my brother in law, my brothers and I we have about 8 muzzle loaders and they all use 11s, my brother in law has a ball and cap pistol and it uses 10s
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
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