I bought my dies and molds from Midway USA they are Lyman 7460497, Lyman shellholder #X-22, molds are Lyman 515139D
I use large rifle magnum primers and 35 gr. 2F Goex black powder. Just finished shooting 34 rounds! I have a range set up in my back yard. The trigger pull is Just about right. before I shot it I lubed the tumbler and sear with some molly grease. Sure helps smooth the release. Had to adjust the rear sight as it was shooting to the right and of course HIGH. The trigger pull is a lot better than the two Reproduction spencers at the fort.
Yours in Spencerdom Pvt Bill