Any SR primers will work, the only difference is Benchrest primers(Rem 7 1/2, CCI BR4) are a little more consistent and CCI #41 & Wolf .223 primers are MIl Spec (harder cup) magnum primers(used with ball powders, not really needed but I like them) and all other SR primers are pretty much the same.
I use Rem. 7 1/2's and CCI #41's for everything, I have 2K CCI 400 SR primers I don't even use anymore but will eventually I guess for plinking rounds.
I was at a store yesterday were I scored another 1K Rem 7 1/2's for $30 but they had 15K Matech SR primers in stock also. I haven't seen these primers before but I'm sure they work just a good as any regular SR primer.