Oso Polaris Wrote:I agree with the better BC of 6.5mm over .308, but honestly out of a sub 10" barrel no one is trying to go any distance. Competitions have proven that flat based bullet are superior out to 300 yards then BTHP. So the BC means a lot less at these shorter ranges. The 300BO has a wider cross-section resulting in better expansion at lower velocities and a bigger hole. Moreover, just from cartridge efficiency you don't/can't consume all the powder in the Grendel case.... more like less then 50% of it, which means you are dumping it into your can or making a large fireball which does not help with night shooting, follow-up shots, and definitely kills any stealth you may have been enjoying. This is why I say 300BO wins in short barrel. Oh Yeah, 30 round magazine fits 30 rounds.

Just because you can doesn't mean you should. Lots of guys shooting 300BO consistently and accurately at 300 yards. Not the way I would go for hunting game... but fine if your killing paper. Its personal taste and perspective.
There is a guy standing behind you nodding his head in agreement with everything you just said, Except that you lost him as soon as he realized that you weren't talking about a real caliber... his 12.5" AR10 (6.5 Creedmoor). The beauty of AR15 is that I can have a 8" 300BO for home defense and handy brush gun for pigs within 150 yards, a 16"-20" Grendel for 600 yards and then something else for longer. If Alexander Arms hadn't put a strangle hold on the 6.5 Grendel when it was introduced I probably would have never picked up the 300BO.