i had a marlin lever in 45-70, shortened cartridge case so the canalure of a 350gr speer could be crimped, run these at 1850fps, real stout load. Two reasons why i got rid of it: shots where I hunt can range from 50ft to 400yds if conditions are right so I like a reasonably good stopper as well as one that can range out, most 06 based mediums will drop a bullet 24 or so inches at 400yds, 8-10 inches at 300. being a bolt gut all the life , except I was born smile with an 870 in my hands, I could or wood not spend the required time to become one with the marlin so for that reason I considered it more of a hazard on the short shots and ranging ability precluded long shots.