I usually use Federal SPP primers or when I can get them I use CCI SPP primers. Powder Valley does not have either of them in stock. I have heard a number of people say that they also liked Tula Primers, which also seem to be out of stock @ PV. PV does have Rem and Win SPP's. I assume that some of you have used Rem or Win SPP's. Need some feedback on them. Any problems? Like or dislikes about them?