A throat cast of each rifle would be a great asset before ordering any mold. The Ranchdog designs have yet to fit any Marlin rifle I have, and I have and have tried several. Tom at Accuratemolds.com is my go to guy for a mold, but you have to know what kind of throat and bore you are trying to fit. Marlin bores, specifically micro-groove, but not limited to them tend to run on the large side. A little fatter than normal and a little harder than normal is the prescription for success in micro-groove barrels.
Good Luck,
Rick
