I'm a grendel fan as well and own two but for hunting there really isn't a comparison. The 270AR handily beats it.
That's like saying a 30-06 is a much better killer than a 308. The guy who says this is either clueless and inexperienced at actual killing, or trying to sell something.
Well, since you brought it up (in no particular context) I'll bite. If your intended quarry requires 200+ grain bullets, then the venerable 06 has a marked advantage. But then WTF does Col Cooper know anyway? I guess he was a 308 "hater" wasn't he?
I spent a bit of time this year walking around on 6.8 brass that an oil-sheik paid for. Not at all impressed with the cartridge. The Grendel launches a great projectile...pathetically slow. The WSSM's have brass consistency/availability issues. I for one am glad someone is trying to finally produce a single-stack round that'll launch a 6mm (ideal, IMO) or larger bullet as close as possible to 3000fps out of a 20in barrel. I thank the gentleman for posting about it.
Rancho GFY.
Sadly, right now all brass has an availability problem, but as for the inconsistency in .243 WSSM brass, it ain't so. Some criticized the fact that it has thick necks that are inconsistent, yet in loading around 1K of my brass horde I found neck thickness to average .0007" with the max being .0015" by measurement. I tried neck turning and annealing but gave up as it produced no discernible advantage. Winchester's brass is about as good as it gets for any brass - including overrated Lapua - right out of the bag.
Back in 1964-65 the AR-15/M-16 was chosen over the AR-10 to allow a larger quantity of lighter ammunition to be carried into battle. I recall reading one critique where the bullets were found sticking in the pad of built up paper targets at 200 meters on military ranges. Yet I have seen it dispatch young feral pigs with a premium hunting bullet at ranges no greater than 150 yards - tasty. Of course you are reading comments from a guy that just built a custom bolt action upper with no gas system in .204 Ruger with a 24" Hart 1:9' twist barrel. The barrel has no gas port. So take everything I say with the appropriate grain of salt, because I'm a varmint hunter so deer get a free pass.
