So, this morning I hammered a pure lead slug through my Browning 1886 (made in 1986).
Measured afterwards, I cannot seem to find a measurement on it greater than .456 for the bore.
Does that sound right to you guys? Maybe I'm pinching the caliper a bit much? I really don't think that I am. It seems like an honest .456, which seems small. Groove depth seems to be .451.