6.5 Grendel

[PathfilmsNZ]

In the process of building one right now.


-Anyone else done an "SBR" Grendel? (those laws don't apply to me but I'm going 12.5")

-Any ideas on what Alexander Arms' lead time is currently on bolts?

-Anyone ever run the book load data from Alexander Arms through Quickload and notice that it's at hilariously high pressures?

[Dr69er]

In the process of building one right now.


-Anyone else done an "SBR" Grendel? (those laws don't apply to me but I'm going 12.5")

-Any ideas on what Alexander Arms' lead time is currently on bolts?

-Anyone ever run the book load data from Alexander Arms through Quickload and notice that it's at hilariously high pressures?

I'm debating weather to add a 6.5mm Grendel or a .260 Remington to my
6.5mm/.264 caliber lineup in 20" or 21" form...since I also have a
6.5mm PCC AR-15 in my stable they would make for a easy trans-
ition.

Although, the .260 Remington resides in a heavier 308 AR chassis,
it gives you a 308 type power factor...

Last time I checked Alex Arms was running behind in the 6 months
time frame on most orders...

A lot of the Grendel guys like to run their guns at maximum pressures
or even higher (not recommended), the nominal maximum pressure
standard for the Grendel is 50K PSI. Although, I have seen some powder
companies use 52K PSI as maximum. The pressures should be run under
50K PSI as the bolt heads are weakened from the extra material that needs
to be cut for the larger (than .223 Rem.) case head of the Grendel round.
You can guess what happens over time from sustained high pressure loads
being fired to the bolt as well as from the high bolt thrust that goes with it...

It is a nice accurate round and pretty efficient to boot, but it has its
limitations like everything else...good brass (and availability of ammo
and parts) has been very tight, and costs have risen pretty high with
all the current shortages etc.

[nincomp]

-Anyone ever run the book load data from Alexander Arms through Quickload and notice that it's at hilariously high pressures?

For some reason, Quickload is not accurate for the 6.5 Grendel. This has been found by Lapua and the powder manufacturers that have used test barrels. If you run the Quickload numbers on loadings from the powder manufacturers' suggested loadings for the 6.5 Grendel, you will often find the same thing.

I am a bit surprised that this is still a problem, since it was discovered several years ago.

[Tedward]

6.5/264 bolt are in stock at Les Baer. Just ordered one yesterday for $85 and $7.00 shipping.

563-289-2126

[PathfilmsNZ]

Is the .264LBC bolt the same as the Grendel bolt? Headspace etc?

[Dr69er]

Is the .264LBC bolt the same as the Grendel bolt? Headspace etc?

Excellent question, there is some confusion out there with Grendel/LBC bolt
head spacing, there are two different bolt face depths:

1) "Type I" has a bolt face depth of ~.125"
2) "Type II" has a bolt face depth of ~.136"

You need to make sure to have the correct bolt to match the
chamber you are using with the corresponding head space etc.

[PathfilmsNZ]

Excellent question, there is some confusion out there with Grendel/LBC bolt
head spacing, there are two different bolt face depths:

1) "Type I" has a bolt face depth of ~.125"
2) "Type II" has a bolt face depth of ~.136"

You need to make sure to have the correct bolt to match the
chamber you are using with the corresponding head space etc.

Yes but is Grendel a type 1 or 2? is .264 LBC a type 1 or 2??

Bill Alexander maintains that there is no type 1 or type 2 there is "correct" and "other shit" and I'm inclined to agree with him

[Dr69er]

Yes but is Grendel a type 1 or 2? is .264 LBC a type 1 or 2??

Bill Alexander maintains that there is no type 1 or type 2 there is "correct" and "other shit" and I'm inclined to agree with him

IIRC, The 6.5 Grendel uses a .136" Bolt Recess.
The .264 LBC uses a .125" Bolt Recess, as well
as many other Grendel variants (same as 7.62x39mm).

[GLShooter]

A standard BHW 264 LBC uses a .136 bolt. A Type I chamber is available on request.

Greg

[Dr69er]

A standard BHW 264 LBC uses a .136 bolt. A Type I chamber is available on request.

Greg

The BHW 6.5 Grendel barrels have been made in both version
(correct me if I am wrong on this Greg) the earlier versions with
a .125" recess and the newer/latest versions with a .136" recess
...So if you happen to have one check with them (BHW) via serial
# on the Bbl. to find out which version you have...You can also
check by using a stripped bolt and a loaded factory round or sized
empty case or even on a empty chamber to see how tight the
lock-up with the barrel extension etc. If it locks up nice and snug
you have the correct chamber to bolt combination. If it does not
you have the wrong combination...

One note on the bolts for the Grendel, IMHO, I would only buy the
complete bolts from Alexander Arms (.136" bolt recess) due to the
fact that they are specifically designed for the Grendel w/ the correct
extractor geometry and are manufactured to higher standards than
typical .125" recessed bolts originally designed for the .223/5.56mm
that have been bored out to .445" to fit the case of the x39mm, and
Grendel variants etc. The only other Grendel bolt I would consider is a
enhanced bolt from ARP or LMT...

I hope this helped clear things up a bit on the Issue...