For primers, I definately prefer WLRM's. They give the most consistant and hottest flame of them all. As to the problem of brass, keep it all the same, whether you choose Winchester, Federal, Remington, Sako, or whatever. Different manufacturers have different internal capacities. This, in turn creates different pressures upon firing, which will affect accuracy. Seating depth also will affect accuracy and pressure. The mixing of brass is more critical in small capacity cases than the big bores, but the problem still is there. If possible, get all of your brass with the same lot number, and enjoy your reloading.