Here is a Midland break action a guy is doing in 24ga FH.

Here is old catalog picture of different stuff used in old days
for shotgun loads. Some would be hairy in brass cases

Here is picture of a MN a guy is doing 585HE in..
It is singleshot. Redid bolt handle mounted it on the bolt
further bac, so the port could be lengthened for our long case.
Needs polishing and blueing, scope rail added.Ed