manny816, hello from west central Mo. and welcome to the MO site. Now for your question, err on the side of caution stay with the loads NOT designed for the Contender. There are actions in the Marlin line-up that can take those kinds of pressure day in and day out, the 1894 is not one of those actions, in my opinion. Should you want more velocity/energy than you can get with these loads get yourself a .444, 45/70 or 450 Marlin. These are built to take the pressures of max loads. Enjoy yourself here and take care, John.