06-02-2022, 04:22 AM
(06-01-2022, 08:04 PM)kevad68 Wrote: For my bolt gun I started off using CCI400's and Federal GM205M's as well, but just moved to CCI450's to try to get into higher velocity ranges. Haven't really had enough time to test out the data out yet, so jury's still out for me whether it's worth it or not.
Magnum primers can sometimes ignite powder too fast resulting in a quicker pressure peak and subsequently less velocity. That was certainly my experience shooting several thousand rounds in converted 7.62x39 brass with large primers.
#FJB