Virgil - love the old school with the separate boys and girls entrances
great gun-
double check the chambers - for my British 2 5/8 inch 10- I cut down modern 10 gauge - and load on a mec 600 jr with a modified short kit - and roll crimp
you can still do that if its 2 1/2
i use load data from Peter's spread sheet - found here
http://parkerguns.org/forums/showthread.php?t=11403
many had a nitro card to take up room, leaving that out allows it to crimp fine
if you want to roll your own- we can help you - really makes the short ten fun to use when the cost is reasonable