Couldn't find a better sub forum to post this so here goes; With the many new reloaders on forums dealing with component shortages, primer use has been a popular topic ("I couldn't find XXX primers, so can I use YYY instead?"). I found this video on another forum and so far, it's the best, most informative bit of info on primer swapping I've seen. Real life pressure testing. Real life velocity testing. Very well put together, professional quality info-video. https://www.youtube.com/watch?v=NGVR...annel=SuperVel