As far as primers go, in some cases there can be quite a large change in precision possible. Almost many of the rifles I've tried the CCI BR2s in have loved them. Besides the "B" within the primer and even more treatment taken when manufacturing them they must be equivalent? https://zndhtchencci-500smallpist85948.shoutmyblog.com/30934127/the-definitive-guide-to-zündhütchen-large-rifle-magnum