So you are not planning on loading for the ar 10 as well As the bolt?

Sure you can only load for 1 rifle, folks have been doing that for ever, neck sizing, or partial full length size.as well as tailoring the seating depth.

for the ar 10/15 a metal mag should allow you a longer seating length than a plastic mag as the mag body is thinner.


If you were single loading and not limited by mag length, those would be seperated out, not necessarily by sizing die setup, but mainly by seating depth.
I want my sized brass to be able to chamber in anything I put it in that I have.