I think I'd like to start with a 400 gr bullet in jacketed. Would RL-7 still be a good choice for the jacketed?

Does the .45-70 typically call for a mag primer or regular primer?

Tom,

I'm not 100% sure what you're referring to when you talk about taper vs roll over crimp. I was planning on purchasing the LEE Die Set which includes a roll over crimp. Here is a link to it.

http://www.wideners.com/itemdetail.cfm?item_id=7613&dir=210|212|232|34 9

Would the Lee dies not do an effective job? Could you explain the draw back of the roll over crimp in more simple terms?

Could you explain what belling is in layman's terms? Also how it will cause a retention problem. Might as well through retention in there as well.

I'm pretty new to this stuff. Maybe 100 reloads under by belt mostly just going through the motions.

Thanks

Tom