12" 6.5G vs 12" 300Blk

[Klem]

Just to be clear, the 300BLK rifles are NOT the ones going KABOOM.

Yes...For me however the more likely risk is being bingled on the way to work by some drunk driver.

Notice how on the specs sheets LeHigh has RPM maximums for their 78 and 79gn CQB 300BLK bullets. This was not the case when they first came out, until the public started complaining about bullets prematurely coming apart in suppressors and wrecking them. Not hard to exceed their RPM maximums with 1:7 twist barrels.

They have some expensive/exotic bullets (caveat emptor) but the BLK is still an average performer.

[MarkS]

Yes...For me however the more likely risk is being bingled on the way to work by some drunk driver.

Notice how on the specs sheets LeHigh has RPM maximums for their 78 and 79gn CQB 300BLK bullets. This was not the case when they first came out, until the public started complaining about bullets prematurely coming apart in suppressors and wrecking them. Not hard to exceed their RPM maximums with 1:7 twist barrels.

They have some expensive/exotic bullets (caveat emptor) but the BLK is still an average performer.

I don't have any experience with any of their bullets except for the 194 grain maximum expansion subsonics, and they are excellent at doing what they were designed to do which is expand at low velocities and do lots of shredding of vitals.

Also, completely agree about the 300BLK when it comes to supersonic performance. I would say it is a below average performer in that category, which is why I don't even shoot supers in mine anymore. The 190gr SMK at 950fps out of a 9" barrel will consistently hit clay pigeons at 200 yds and that is pretty damn good for an AR15 with such a short barrel. But mostly, it is just really fun to shoot.

Furthermore, I have moved to the 6.5 Grendel for most of my hunting because it is such a great all-around cartridge. My 12" Grendel weighs less than my 9" 300BLK fully loaded, and I have more confidence that the Grendel will quickly and ethically kill the animal I am harvesting. I do have a 6.5 Creedmoor that is the most accurate rifle I've ever shot, but it's a little too heavy to carry around plus the 22" barrel is cumbersome with a 7" suppressor attached to it.

And finally, to answer the original question... If you never shoot suppressed, then you will be disappointed with a 300BLK. Get a Grendel and be happy!

[Sniper3142]

300BLK is a round that does not need to exist. Subsonic, the 45acp has been doing the same job for over a century. Supersonic, 7.62x39 and 30-30 are its equal. As far as ballistics go, 6.5 Grendel takes 300blk's lunch money and f***s its girlfriend.

AGREED.

People often claim the 300 Blackout is better suited to short barrels then 6.5 Grendel. But I've got a 12 inch 6.5 Grendel upper from PSA and the terminal performance makes supersonic 300 Blackout look like a wet sneeze in comparison.

[MarkS]

AGREED.

People often claim the 300 Blackout is better suited to short barrels then 6.5 Grendel. But I've got a 12 inch 6.5 Grendel upper from PSA and the terminal performance makes supersonic 300 Blackout look like a wet sneeze in comparison.

I've got both of them, and what you say is true only if you are exclusively talking about supersonic performance. The 300BLK is a much better platform for shooting subsonic suppressed.