I have used them exclusively for reloading. I'm not sold on them being inconsistent. I have printed 3/4 moa groups with them. And every one of the primers has gone bang. Just my experience.CCI "Arsenal" beefed-up-cup primers, while reducing theoretical chance of slamfire, are also quite inconsistent and add anywhere from 30-50 FPS to your range of Standard Deviation. Filtering by weight doesn't seem to remedy the issue either (and we're talking +/- 300 micrograms here). I'm not entirely sure why this occurs, but it is consistently a performance bottleneck with both the #34s and #41s.
IME the beefed-up primers are unnecessary. I have no problem running BR-2s in my AR-10, and safety evaluations did not show abnormal cause for concern.
The old Lee 1000 and Autoprime I have both have specific warnings against using Federal primers; haven't seen (don't recall, at least) any warnings against CCI.IIRC, equipment manufacturers generally warn against using CCI primers in their priming equipment. Why, I do not know. I have never had a problem with seating them with a Lee autoprime.