I saw where this was an option, but with even LaRue mags going 2.870ish it's a waste! Going shoulder forward leaves a bullet no longer than 1.050". A wsm and saum case would be better than prc in this case (truly). Getting cases longer than 2.100" is a waste on the top heavies (180+). The saum gives me better options for up to 185 without seating deep.