totin'a10
I can't remember what the figgers were when i tested mine. I used a ruger super black hawk and a marlin trapper which had a 20' barrel.
The ruger sbh was 6.5 barrel. Like i said i can't remember what the difference was but it was quite a bit, some one will get back to you that can remember, i think i must have OLD timers. Good luck sir...Joe