RE: marlin 30-30
My buddy has one he got from his grandfather (revelations I think) and as I don't recomend doing this for satfey reasons we hand loaded some 30-30 rounds tipped with Hornandy SST's,got the seating depthand yes we shot them one at a time accept when he was deer hunting he loaded two flatties the chamberedone SST. I couldn't believe how well it did out to 200 yards loaded a little hot. It actually shot(as much as i hate to admit it) better than my Ruger 338 out ofthe box before i did the extra stuff to it. That year he took a deer at 180 yards and it did a good job to boot!