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SPCsaunders
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Posted: 3/19/2011 9:36:07 PM
looking to purchase and build a 6.5 grendel AR and was wanting some perspectives from other grendel shooters on what would be the best barrel length to get. Im looking to use this rifle from deer and longer range varmit hunting...possibly fairly close elk...as well as medium / long range target shooting...so far im thinking the 24 inch barrel...what do you think? thanks
LedZeppelin
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Posted: 3/19/2011 10:08:10 PM
Atleast 18", cut rifled. 24 would give better velocity. If you want to shoot beyond 300yd, cut rifling will do better than button rifling.
OhioLongRange
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Posted: 3/20/2011 9:55:47 PM
who sells cut 24's?
Specop_007
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Posted: 3/21/2011 11:44:22 AM
My thoughts are not over 20" for anything except dedicated benchrest guns. Those inches add pounds in the field so to speak.
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benjio
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Posted: 3/22/2011 8:17:25 PM
I've been interested in a 6.5 Grendel on the AR platform for awhile now to replace my "varmintish" 20" AR that I have now. Seems like you kinda get better reach and energy at further distances than a .308, eh? And that in an AR15 platform, not an AR10; which seems like a winner.

I've noticed that the cut-rifled barrels are roughly double the cost of the button-rifled ones. I'm a noob here, but what's the difference? And is a cut-rifled barrel worth double the cost?


thanks, Benji
LedZeppelin
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Posted: 3/22/2011 10:14:51 PM
Originally Posted By benjio:
I've been interested in a 6.5 Grendel on the AR platform for awhile now to replace my "varmintish" 20" AR that I have now. Seems like you kinda get better reach and energy at further distances than a .308, eh? And that in an AR15 platform, not an AR10; which seems like a winner.

I've noticed that the cut-rifled barrels are roughly double the cost of the button-rifled ones. I'm a noob here, but what's the difference? And is a cut-rifled barrel worth double the cost?


thanks, Benji


Cut rifling is cut .001" at a time, one groove at a time, thus creating very little stress in the barrel steel. Button rifling uses a series of buttons that form all of the grooves at once and causes stress to the steel. Stresses cause inconsistancies as the barrel heats, and cut rifled barrels tend to send out more stable projectiles. That takes more and more effect the longer the range. Either can be accurate at closer ranges, but cut rifled barrels will maintain smaller groups for longer ranges.
LoneWolfUSMC
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Posted: 3/23/2011 8:45:40 AM
I worry less about the type of rifling and more about the quality with which it was done.

Even the guys who make cut-rifled barrels will tell you there are some extremely accurate button rifles barrels on the market.

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benjio
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Posted: 3/23/2011 4:34:22 PM
Thank you both for the replies. The Grendel is a new area of interest for me, so I'm getting into a little bit of uncharted territory. This would by far be closest/mostest wildcat cartridge I've ever considered buying a rifle for and reloading for. As of now, I'm thinking an 18" or 18.5" barrel is gonna be what I lust for... It will definitely double as a hunting/field rifle, so I really would like to keep it on the shorter side of 20"...
rg1
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Posted: 3/24/2011 8:50:04 PM
My brand new J&T/DoubleStar 6.5 Grendel bull barrel 24" weighs 11-12 pounds with scope. A little heavy for packing and walking but I like the added length for possible long range shooting. Any rifle is going to weigh 8-9 lbs with the 24" going up to about 10. Only another pound or two with the longer barrel. A standard .223/5.56 A2 with a 20" barrel will weigh approximately 8.6 and around 8.2 for a 20" flat-top. So they are all fairly heavy rifles unless you go with a ultra-light version. Only difference I see with the shorter versus longer barrel is the balance point and the longer barrel being a little front heavy. Haven't shot mine yet but just got a series of test loads ready plus a couple boxes of Hornady factory.
MK402
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Posted: 3/24/2011 10:58:30 PM
I'm in the market for a 6.5 barrel and considering an 18 or 20. Anyone have experience with black hole weaponry and their polygonal rifled barrels. Their prices seem very reasonable (no grendel royalties).
LoneWolfUSMC
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Posted: 3/25/2011 1:05:00 PM
Originally Posted By MK402:
Anyone have experience with black hole weaponry and their polygonal rifled barrels.


Ask them who makes their blanks/barrels.

Chances are they are PacNor and will shoot well if chambered correctly.

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