buckbrush said:According to Marlin, the Marlin isn't designed for any handloads. The .450 Marlin rifle's has different barrel threads , v threads instead of square, and some people claim it also has a stronger barrel steel.
Scarecrow said:The pressure rating of a Marlin lever gun allows for more powerfull loads.
http://www.realguns.com/loads/4570.htm
buckbrush said:I said Marlin doesn't rate their 45-70's, or any of their guns for handloads.