Unless you handload I wouldn't bother. If you do, it's a pretty flexible number. Don't have a Marlin, but a Ruger No.3 so chambered that shines with the 235 Speer or as a cast bullet launcher. Small game/plinker loads with roundballs are amusing as well. Starline still makes 38-55 brass that'll work if you trim it, in the event you can't find any of Winchester's once in a blue moon brass.
