Junior's article on loading BP cartridges for the 45/70 would probably provide good insight on loading for the 444 Marlin. When (if) I can remember what thread the link to this fine article is in I will post it. I think it is in the H&R Muzzleloader section but not for sure.
Why be difficult, when with a little extra effort you can be impossible?
Wife's Handis; 300 BLKOUT
MINE: 270W, 308x444, 44 Bodeen, 410 shorty rifled slug gun, 445 SuperMag Shikari, 45 ACP shorty, 45-70 Shikari, 45 Cal Smokeless MZ, 50cal 24" SS Sidekick, 50 cal 24" Huntsman, 50 cal 26" Huntsman, 50 cal 26" Sidekick, 50-70 Govt Shikari, Tracker II 20 ga shorty, 20 ga VR Pardner, 20ga USH, 12ga VR NWTF, 12ga Tracker II shorty WITHOUT scope, 12ga USH, 10 ga Pardner Smoothbore slug gun & 24ga Profino Custom rifled slug gun.
Active Trader until: July 25, 2013