6.5 Grendel Preferred Loads

[ErikS]

At what OAL?

2.25

I had no pressure signs at all.

[Crusty]

Differences in the bores between rifles can account for some people seeing high pressure and others not.

Higher friction that a bullet encounters going down the bore causes higher pressures in the chamber. When you coat your bullets with a friction reducing compound you typically have to increase your powder charge several percent to get back to the same muzzle velocity you had before coating because of the lower pressure that results from the reduced bullet friction.

[Doc78]

28.2gr 8208xbr
Alexander Arms virgin brass
Federal gold medal match SRP
123gr eld M

Cloverleaf(.332 MOA) at 100 with a 5 shot group. Seated 50 thousandths off lands.

Gun:
Howa 1500 mini action with 20" heavy barrel.
MDT LSS chassis
Bipod and rear bag used
Athlon 6-24 BTR scope
Stock trigger adjusted down to 1.25lbs.

[BluntForceTrauma]

Doc78, did you say LSS chassis? I LOVE those. Need pix!

[sierracharlie338]

28.2gr 8208xbr
Alexander Arms virgin brass
Federal gold medal match SRP
123gr eld M

Cloverleaf(.332 MOA) at 100 with a 5 shot group. Seated 50 thousandths off lands.

Gun:
Howa 1500 mini action.
MDT LSS chassis
Bipod and rear bag used
Athlon 6-24 BTR scope
Stock trigger adjusted down to 1.25lbs.

What velocity are you getting with XBR?

[1911man]

Any of you guys running that 27.5-27.6 grain AR comp load have any Chrono data? I found an accuracy node in that range but the SDs werent very good so I kept pushing it. Found another node in the 28.0-28.3 range with SDs around 10 and ESs around 15 and that is why I settle there. Groups were about the same.

[Jgilesg]

[Hermosa65]

Folks,

Here are my latest results from my 6.5 AR. It has a 22" upper from Stryker Machine and Tool based in Winston Salem, NC. Using CFE223, I was averaging 1 - 1.5 MOA. With AR-Comp as per the picture below, I was able to get sub-MOA on 3 groups 0.69 - 0.95. Below is the .69 group. No signs of pressure.

Alexander Arms Brass
WSR Primers
27.5gr AR-Comp
123 Hornady ELD
2.257 COAL

IMG_5417.jpg

[Doc78]

What velocity are you getting with XBR?

I'll be getting velocity this weekend. I usually don't do velocity when finding the best grouping and seating depths. I will get out Sunday to chronograph and post results.

[Doc78]

Doc78, did you say LSS chassis? I LOVE those. Need pix!

Do I need to use a third party site for pictures. If so what do you recommend. Or if you can shoot me an email I'll send them to you.

[biodsl]

Here's some help.

http://www.65grendel.com/forum/showthread.php?10354-How-to-post-pictures

[beastep]

2.25

I had no pressure signs at all.

Thanks man. I have to be under 2.20 to get my 123 ELD off the lands and Im having pressure signs way under max load with the CFE 223 and was thinking about switching to AR Comp.

[ErikS]

Thanks man. I have to be under 2.20 to get my 123 ELD off the lands and Im having pressure signs way under max load with the CFE 223 and was thinking about switching to AR Comp.

My BCA upper has a SAAMI chamber and I am clear of the lands at max mag length so your result will not mirror mine at all.

[beastep]

Interesting. Do you know what barrel is on it?

[1911man]

Thanks man. I have to be under 2.20 to get my 123 ELD off the lands and Im having pressure signs way under max load with the CFE 223 and was thinking about switching to AR Comp.

Whoa, that is just about the shortest chamber I have heard of in the time I have been on these boards.