From 6mmBR
Primers
We wish we could say something definitive about primers--but the truth is both Federals and CCIs are winning their share of matches. Federal 210m, and CCI BR2s have both proven accurate with all the most popular propellants for match ammo. We can say that if you have experienced issues with cratering and primer piercing, go with the CCIs. They have a harder cup. Among other primers, WLRs are used in Black Hills match ammo and they perform admirably. Russian primers are the newest thing to hit the market, and by all indications they work as well or better than the best domestic primers (so long as the rather hard Russian cups are firmly seated to proper depth). Note, Russian primers are currently distributed by PMC and retailed in PMC boxes. However, PMC will not import them after the first of the year. AccurateShooter.com has been informed that a large, well-known foreign ammunition company will take over importation of the Russian primers and they should be readily available by the second quarter of 2006.