Varget gets along particularly well with the CCI 200.
The Federal brass will be thicker, softer and smaller capacity than the others. Be careful with it, a lot of the loads people quote for a 308 were developed in WW brass and will be hot in the Federal. If you're working with a 165/168 grain bullet you'll want to start lower than the 44 grains you mentioned.
The RP will have a bit less capacity than the WW, but not as much less as the FC.
Treat yourself to a Forster or Redding competition type seater die.
Unless the factory molded stock presents a problem you should have that 308 grouping tight with little fuss.
Enjoy it!
