KW
As for a .460 fitting a fired case from a Shiloh, that’s a loose chamber definitely very thin wall brass. Most Shiloh chambers in 45 run .482 at the mouth my old original Shiloh ran .480 and a .458 bullet was very tight .003 neck tension.
A .460 bullet has to be swaged down when it hits the grooves, this displaces lead to the rear causing base finning, seen plenty of examples of this at the mile target.
ok thats some of what I was lookin for - thanks - these discussions usually yield something of value even if its not what we set out to cover at the start.
base finning ? would a solid, neat fitting wad (I use HDPE) overcome the base finning ? or help to?
heres some numbers (might back up some of what you are saying - or not)
my pedersoli / uberti 45/75 is .485" neck - thats a go - nogo measure - dont see it as a problem because of the extra neck thickness of the brass I am working with. Shorter boolits I size .460 and run the loaded rounds through an outside swage die at .4845"
Loaded rounds for my Chiappa 1886 run .484" OD and chamber fine
so both of these are pointing directly at your oversize Italian chamber ? Both guns seem to like boolits .459 - .460 and neither will do well with a 458 boolit (different design though, my .458 is a CBE Postell = different nose profile than the Lyman and smaller lube grooves).
my Marcheno sharps Loaded rounds measure .480" OD and that is a neat deal
PS I was not saying a Pedersoli was better - but in the right hands might be almost as good ? - in most hands (bottom half or even two thirds of the leader board) the "hands" are gonna be the deciding factor as much as the equipment.