I'm trying to find a load for my Marlin 45-70. I am currently getting ready to load up some 405gr cast with gas checks. I don't have any load data for these rounds and was wondering if I could use the load data for a 400gr jacketed bullet.
I don't know if being cast w/check makes a difference than a jacketed bullet. I just want to be safe about this and I apologize ahead of time if this is a stupid question.