So I am wondering how much velocity I would gain building the prc over the ackley. Would I need a different action than the bighorn tl3 or just the new bolt head? Are velocities going to be close? Experience would be great . If I do the ackley all I have to buy is dies. If I do the prc I have to buy brass dies and a bolt head. Planning on finishing at 28" mtu 1-8 krieger. Thanks