View Full Version : Green Mountain twist rate?
07-05-2009, 08:44 PM
I bilt a Galil AR using a Green Mountain barrel. The Galil was a kit that was several years old and never completed when I bought it. The rifle will not stabilize a 55 grain flm worth a dar, however it liked the M855 ball ammo.
What is the twist rate of the Green Mountain Galil barrel? I tried the cleaning rod/tape trick with mixed results.
07-05-2009, 10:41 PM
The current barrels Century use for the Golanis have a 1 in 9 twist. Any 1 in 9 will stabilize the 55 grain or 62 grain bullets equally well. My 1 in 7 NM AR shot the 55 grain South African surplus into very small holes at 100 yards. I did have problems shooting 50 grain hollow point bulllets, they started coming apart on me, probably due to being rotated too fast.
07-06-2009, 07:36 PM
The resason I posted was that the 55 grain bullets were like a shot gun at 100 yards. the M855 Ball was shooting 3 shot clover-leaves groups.
07-14-2009, 07:11 PM
Could very possibly be a 1 in 7 twist. Why not just measure it?
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