This is my first post on this site and I'll start out with what some may think is a very Stupid Question about .30 Remington Vs .30-30 Winchester. I recently came into being the proud new owner of a box of ammo that most of are calibers I'm not familiar with. In this box is a 20 Round box of .30 Remington 170 Gr Core-lokt PSP rounds. I did some reading on the net and see it was basically the same as a .30-30 Winchester load. My question is will my Marlin 336 in .30-30 safely chamber and fire these rounds? I don't even want to load them into the rifle until I get info to tell me if this is safe to do. Thanks and I apologize for being an old gray haired noob with a dumb question.