I'm on my third Grendel and I'm regretting not building an AR10. Load development is a PITA for the Grendel compared to a .308. The Grendel is a light, compact rig compared to an AR10, but those are getting lighter and lighter. Look at the DPMS G2. My next AR hunting rifle will be chambered in .308.

I haven't loaded my own Grendel ammo, so I couldn't say. If it's a pain vs. going the .308 route, and you wanted to roll your own, that would certainly be worth considering. The Hornady match ammo has always been so good and relatively inexpensive for me that I've never considered it. Of course, you can't count on one factory load to perform, so it is quite a factor. My rifle was built for that round.

.308, hands down. You can build one fairly light.

Why build a 6.5 Grendel in an AR10? It's heavy and you don't need the OAL for an AR10. My AR15 6.5 Grendel is awesome and I love shooting it suppressed. If you wanted a 6.5 in an AR10, then you should go 6.5 Creedmoor.

I think he meant build either an AR10, which are typically .308, or an AR15 in 6.5 Grendel.




Another option, OP, if you want a touch of awesomeness would be .338 Federal (if you don't need too much distance).

AR10 in a 7mm08

AR-10 in 6.5 Creedmoor.

I shot 20 rounds of Hornady Black 123 ELD over a LabRadar last Saturday. The average velocity from my 18" barrel was a whopping 2510fps. Many rounds were under 2500. That's almost 300blk territory.

Surely, we aren't comparing the Grendel to the Blackout. Right?

Look at the 22Nosler shooting 75Gr AMax at 3100 is not to shabby