CMMG 6.5 Grendel

[LRRPF52]

Been saying for years they should take the mutant Upper mod it for normal mags and load it in 6.5 grendel. My original thought was it could be loaded to higher pressures(58k) since thats what the x39 is loaded to. Wonder how much they weight.

Are you saying people are hot-rodding 7.62x39 in the Mutant to 58ksi? That bolt and extension plus barrel tennon might take it, depending on how long the lugs and teeth are. Look at the 30 RAR and ask why they were limited to 55ksi SAAMI MAP? Extension lugs aren't as long as an AR10. I suspect the 30 RAR bolt lugs are shorter too. We can ask the forum member with one to caliper his lug lengths.

SAAMI MAP for 7.62x39 is 45ksi. x39 has more thrust at the same pressure because the chamber is so tapered, like a shape charge aimed at the center of your bolt face.

That's the main temptation with the CMMG Anvil though. Those who like to hot-rod will want to push it faster, with higher pressures.

I can think of 2 people off the top who are probably already salivating at the chance to push a 130 or 140 to .260 Rem speeds. The Grendel and 6.8 in the AR15 certainly didn't stop them from doing it already. Maybe they'll get 6.5x284 speeds from this one and rush back to tell us about how safe it is, no pressure signs!

Drag their cases through a bowl of H322, scrape the overflow kernels off, and crunch a bullet down into the case, then head off to the range. Primers will fall out after the first load, but that's a small price to pay in the quest for more speed.

I like CMMG and it's nice to see another complete factory AR chambered in Grendel that has everything controlled under one roof.