65G barrel length vs velocity loss?

[sharpshooter33]

I'm new on the grendel forum per se. I did a quick look around looking for a sticky on the barrel length vs velocity loss. Didn't see any.
Anybody know or have a link to the 6.5 Grendel barrel length to velocity loss?

Thanks
SS33

[A5BLASTER]

Get the second volume of the grendel handloading manuals there is a very good graph in it to help map out predicted muzzle velocity's.

You can use the very ruff idea of 100 fps for every 4 inches of barrel as well. After chongraphing a 20 inch bolt action, 20 inch ar, 18 inch ar and 16 inch ar. I find the 25 fps to be plus or minus within 10 fps of where the speeds were at with factory ammo.

[VASCAR2]

49B5F7E7-B98B-4324-A30A-66BACBA3A740


Here are some realmworld results.


http://www.65grendel.com/forum/showthrea...Range-trip


http://www.65grendel.com/forum/showthrea...ph-results

[sharpshooter33]

vascar2,
thanks for the links. the 1st had the exact barrel lengths I was interested in. Looks like between 18" to 12" your looking at 245-219fps loss. roughly 35fps per inch in the 18" to 12" barrel range.
great info and great threads.
Thanks
SS33

[sharpshooter33]

Get the second volume of the grendel handloading manuals there is a very good graph in it to help map out predicted muzzle velocity's.

Didn't know there was a grendel handloading manual? where can I see or get my hands on one?

[Wargrendeleagle]

Didn't know there was a grendel handloading manual? where can I see or get my hands on one?

https://www.ar15buildbox.com/shop/65-Gre...dBooks.htm