04-17-2022, 09:08 PM
I got 2493 FPS for factory 123 grain SST from an 18 6.5 Grendel AR-15 using a MagnettoSpeed Chronograph on a 70 degree day. I use Hornady standard 6.5 Grendel dies and they are good dies for the money. I have a set of RCBS 264 Grendel dies which are small base dies which I think over work the 6.5 Grendel brass. I have several 6.5 Grendel AR-15s so this might be more of a issue than someone who only uses his reloads in one firearm. I have a Forster sizing die but I have never used it mainly because of family obligations have reduced my available time.
Lee dies tend to over work the brass which tends to reduce brass life.
Lee dies tend to over work the brass which tends to reduce brass life.