I need some help. I am trying to determine what muzzle diameter certain #1's have because I am looking at obtaining one for a rebore to a larger caliber. (.500 S&W)
anyone with a #1 in 45-70, 375 H&H, 458 WIN MAG, or other caliber in a fairly heavy barrel with sights. pleas measure the muzzle diameter, (not around sight band) and let me know your findings.


Brian
LTC, USA Ret.
NRA Patron Member
AHFGCA Life Member
USPSA Life Member