6.5 Grendel & 6mm AR velocities in 20-inch


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Grump
February 20, 2007, 09:00 PM
...and 14.5 and/or 16-inch AR barrels.

What's being recorded in the real world, both from factory ammo and SAFE reloads?

I've tried searching this site, others, and the whole 'net with Google, and almost everything muddies up the works with velocities from 24, 26 and even 30-inch barrels...or they just report one bullet weight. I'm looking mainly for 107-gr and 123-gr weights in 6.5 Grendel, and 105-107-gr in the 6mm AR (basically a 6mm Grendel, more powder capacity than the 6mm PPC).

Just after a "reality check" here.

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Reginhild
February 20, 2007, 09:51 PM
http://www.65grendel.com/65GrendelReloadingData.pdf

http://www.alexanderarms.com/grendel_ballistics.pdf

For more info you will probably have to dig through posts at the 6.5 Grendel Forum (http://www.65grendel.com/forum)

Grump
February 20, 2007, 11:18 PM
Already checked both of those sites and found a lot of references to longer barrels. Want to reality check the .pdf, as it seems to be the only resource that claims to use 20-inch barrel velocities.

The Alexander Arms page DOES include the 123-gr data I'm after and 14.5-inch and 19.5 inch barrels, but not the 107-gr bullet...

rangerruck
February 21, 2007, 01:01 AM
http://www.6mmbr.com/index.html
big speed jump for the 6mm, but also a big dif in energy between 300-600 yds.
the old 6mm remmy is actually a speed demon, and a laser flat shooter. it is about 200fps faster than a 243, and that is factory loads, since it is a super long case and neck, you could really jump that speed up, to 3600 plus feet per second, with a 105 grain bullet.

Reginhild
February 21, 2007, 01:22 PM
The far right column on the first link has 107gr velocity for a 14.5" barrel.

107 SMK from 14.5" barrel 6.5 Grendel is 2423 fps w/29.5gr Western Tac.
108 Scenar from 19.5" barrel 6.5 Grendel is 2670 fps w/29.7gr Western Tac.

Grump
February 23, 2007, 04:33 PM
I'm gonna post a link to this in Reloading. I was hoping to have replies from people who've chrono'd their own rifles.

Reginhild
February 23, 2007, 05:34 PM
There is a fair amount of info on 6.5 Grendel velocities from personal rifles in the reloading area of the 65grendel.com forum.

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