CCI BENCHREST RIFLE PRIMERS. In benchrest competition, there is no such thing as a group thats too small. Everything has to be tuned to the highest degree to produce match-winning results. ThatÆs why we make CCI Benchrest primers. Only our most experienced skilled personnel put the priming mix in the cups, so you get the same flame, shot after shot. We also use specially selected cups and anvils for added consistency. An independent researcher identified the use of CCI Benchrest primers as one of two factors that were the most significant contributors to tiny groups. We canÆt add much to that!