Wolf Ammo Keyholes in my 43 LB

[browningautorifle]

ounds are actually at six o'clock

That's fine, I mean the LB 2 groove needs slugged to find out what bore diameter. If you use a buckshot ball that's oversize and tap it through this mystery will be solved... Also, look closely at the muzzle to see that there's no bulge there, even if just slightly or at one side.