Harper's Ferry info needed !

[Boaz]

I owned a couple of Harper Ferry pistols back in the 80's . Brought an unfired early 80's model Pendersolli Harper 58 cal a few months ago . Thinking about taking it out this weekend but cant remember the RB size . Anyone know off the top up their head ? There is a price for getting old , LOL . Thanks !

[DIRT Farmer]

Should work with a 570 and ticking.

[Boaz]

Thank you Dirt Farmer !

[bob208]

i have an old navy arms with a zoi barrel. it is 3 grouve. i use .562 pure lead balls with a .020 patch.