OK, HIYA RUBE
I tried this once and it just went POOF
Anyway first up:
PLUS ONE for Cap'n Redneck. First CAVEAT: I am loading for a pair of Hammer Doubles, NOT for a Repeater.
Second CAVEAT: I am loading for playing CAS . . NOT for war in the trenches so I load light.
The RECIPE: 12GA Magtech hulls > about 40Gr by weight 2F APP > Ballistic Products "Spitfire" wad with 1 Ounce shot cup > Scoop of shot to fill the Shot Cup > Two Over-Shot cards with no glue or stick-um. Everything stays together during recoil (DO NOT drop them on concrete)
I also DO NOT recommend any crimp. Shortens case life and the crimp DOES NOT come out on firing. Stays. Makes it a ROYAL PITA to re-load.
I use LEE Classic Single Stage with an RCBS Die and Shell Holder for 12Ga Brassies for De-Priming and Re-Priming. Everything else by hand. I have NEVER had to resize any of my hulls unless some Ham Hock stepped on one. Boo Hissssss. I add this as I had lots of Fail-to-Fire when priming on a flat surface. Didn't go well.
Play Safe Out There