02-15-2021, 08:14 PM
I have a 12.5" 6.5 Grendel upper built by Precision Firearms. The bolt would not go in to battery with a round in the chamber, so I swapped it out the with a JP one. The gun runs fine now, but the velocity seems much higher than I expected. I'm getting 2,428 fps on average with Wolf 100 grain steel case (and this is in sub 30° weather). I checked the ejected rounds and the primers aren't bulging out, so I don't think there's any over pressure. Is anyone else getting velocity this high with Wolf out of a short barrel, or do you guys think I have a bad chronograph? Thanks.