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Gas Port Sizes for 6.5 Grendel barrels?

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Gas Port Sizes for 6.5 Grendel barrels?
WSAR15 Offline
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#1
12-09-2018, 03:03 PM
What are the recommended gas ports diameter sizes for 20" (Rifle gas tube length), 18" (Rifle and Mid gas tube length) and 16" barrels (Carbine gas Tube)?
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Howling Coyote Offline
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#2
12-09-2018, 08:14 PM
My 20" barrel with rifle gas length is .093 (3/32").
My 16" barrel with carbone gas length is .0625 (1/16")
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bigdaddyflo Offline
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#3
12-09-2018, 08:23 PM
Some good info on this thread...
http://www.65grendel.com/forum/showthrea...post156627
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LRRPF52 Offline
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#4
12-19-2018, 04:53 PM
General speaking, if going off of Bill Alexander's extensive developmental work on setting up gas ports:

20" RLGS .0935" (like on a 5.56)
18" MLGS .076"
16" MLGS .076"
16" CLGS .0625"

My Faxon 12" CLGS group buy is .068", runs great suppressed and unsuppressed so far.

These barrels and ports will generally drop onto an existing lower whether it has a carbine RET, 2.0 ounce buffer, and Mil-Std carbine spring or a rifle RET/spring/5.1 ounce buffer.
NRA Basic, Pistol, Rifle, Shotgun, RSO

CCW, CQM, DM, Long Range Rifle Instructor

6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

www.AR15buildbox.com
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