05-14-2020, 09:11 PM
Howa Mini 22", 123 SST, Starline brass, Federal GM205M, and 27.4 Benchmark gave me about 2475 FPS (I may be off a little on the velocity, but thats the approximate number I recall). Keep in mind this is 0.2gr above Hornady book max, but it works well in my gun and does not show any indication of pressure. I know the 6.5 Grendel is held to a lower pressure than a lot of cartridges not designed around the AR platform limitations, and as such doesnt show pressure signs until above the SAAMI rated pressure. I also know that just about every piece of factory load brass comes out with a tiny ejector mark on it, where the loads I have been using do not. Different brass, but the factory stuff shouldnt be showing pressure signs like that.