Inherited a Trapdoor made in 1888. When I got it, you could not see the rifling. After a lot of scrubbing, boiling water, and patches, I can see the rifling. From the breach forward 18" or so, bore is bright ,shiny, strong rifling. From there forward, looks like a sewer pipe!! The rifling is there, but so is a lot of pitting. I used a .460 bullet and drove it from the muzzle to breach. It miked .457-.455, bullet was egg shaped? Anyway, do I start with .458 sized bullet or go back to .457? Tried shooting .460 (was what I got with rifle) and they keyholed at 25 yds.! Any advice would be much appreciated.
thanks,
rmcc