Quick question on 6.8

[h20hunter]

So...I've been reading and following the threads on everyones favorite 6.8 round. Can somebody give me the dumbed down version of the difference between the Gredel and the Creedmore. I've looked at both round and am not seeing a ton of differnce.

[Fl0und3rz]

.223 is to grendel as .308 is to creedmoor - very roughly speaking.

[h20hunter]

So the grendel is a modified .223 and the creedmore is based on the .308.....

[Fl0und3rz]

You can wikipedia the two to determine their origins.  I was more referring to the differences in power level (although not as pronounced as .223 to .308) and ability to fit the different size AR pattern rifles.  The respective wikipedia pages gives a difference of about 300 fps over the grendel, but with 4" longer barrel, in a 120 grain projectile.

[h20hunter]

Ok.....I think I got it....thanks.

[Biggerhammer]

The 6.5 Grendel can be run on a standard AR15 Platform with the change of the barrel, bolt and magazine. The 6.5 Creedmoor is a larger cartridge and requires a AR10/SR-25 .308 platform. So you can convert a semi auto AR-10/ SR-25 To 6.5 Creedmoor by simply switching out the barrel, the bolt head and magazine are the same. The 6.5 Creedmoor is closer to .260 Remington velocities than it is to 6.5 Grendel velocities. The 6.5 Grendel dwarfs the 5.56 in distance performance and energy. 5.56 Vs 6.5 Grendel is apples to oranges and basically not even in the same ball park for comparison.

[h20hunter]

Thanks Bhammer.....the AR15/AR10 difference is what I had not grasped. Thanks.

[FALFire]

If I recall, the Creedmore was actually designed for shooting high BC bullets in short action rifles and later discovered that it was a perfect fit for the AR10 sized action as the Creedmore case is slightly shorter than the 260 Rem. casing and just a tad less tapered but still uses the .473 case head.

The 6.5mm 139 and 140 grain bullets are allowed to be loaded for better OAL due to Ogive location of the bullet for slightly better performance without seating the bullet too deep into the 260 case and sacrificing case powder capacity when dealing with a detachable magazine such as the AR10 or SR25. Essentially the 6.5 Creedmore and the 260 Rem. are pretty much equal in performance with only slight variations in case body dimensions.