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Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

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  #1  
Old 11-21-2012, 7:08 PM
steve92553 steve92553 is offline
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Default how accurate are Green Mountain AR barrels

i recently put a Fluted 16" 5.56mm 1:7 twist chrome lined barrel on my 80%. i put about 50 rounds through it and im not too impressed with how accurate it is. im using american eagle 55 grain. it was holding about 2inch groups at 100 yards. does anyone else have one of these barrels? are you getting the same results? how many rounds would you say it takes to "break in" a barrel. thanks for your replys
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Old 11-21-2012, 7:15 PM
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Quote:
Originally Posted by steve92553 View Post
i recently put a Fluted 16" 5.56mm 1:7 twist chrome lined barrel on my 80%. i put about 50 rounds through it and im not too impressed with how accurate it is. im using american eagle 55 grain. it was holding about 2inch groups at 100 yards. does anyone else have one of these barrels? are you getting the same results? how many rounds would you say it takes to "break in" a barrel. thanks for your replys
2" is pretty good for American eagle 55gr ammo.
If you want to test the accuracy of a barrel, you should get some 69gr federal gold medal match or black hills 75gr or 77gr match ammo.

The ammo you are using now is not capable of shooting tight groups.
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Old 11-21-2012, 7:23 PM
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thanks, ill pick up a couple boxes of those 2 and see what i can do then.
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Old 11-21-2012, 7:52 PM
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I would be happy with 2" groups using 55grain out of a 1:7 chrome lined.
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Old 11-21-2012, 8:29 PM
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As others have said, that barrel is far better than the ammo you're serving it.

Quality/match ammo shoud SIGNIFICANTLY reduce that dispersion.

And don't people tell you that the fact it's chrome lined is gonna make it inaccurate.
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Old 11-22-2012, 8:55 AM
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If you are getting 2" groups at 100yds on a 1:7 twist, thats pretty darn good.
You should be feeding 69gr-77gr on that twist anyways to get the best results.

Green Mountain is a large barrel manufacturer and they manufacture barrels for a lot of big name companies. Dont let the name fool you.
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Old 11-22-2012, 9:16 AM
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GM is one of the "go to" brands for aftermarket 10/22 barrels. Known for accuracy at a good price.

No matter what kind of gun, if you test accuracy you need quality accurate ammo. Even better if you reload your own and find out what it likes best.
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Old 11-22-2012, 10:00 AM
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Chromelined, 2", 55gr... That's really good.

At least your honest. I've heard people claim 1/2" moa with WWB from a delton 16".....
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Old 11-22-2012, 11:32 AM
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Wellll....
An educated guess is Green Mountain makes 80% of the boutique AR makers' raw barrels.
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Old 11-22-2012, 11:58 AM
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Quote:
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Wellll....
An educated guess is Green Mountain makes 80% of the boutique AR makers' raw barrels.
ER Shaw actually is responsible for a large percentage as well. Their blanks are about the same price and same quality.
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Old 11-22-2012, 12:05 PM
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Shaw makes barrels for Franklin Armory, as well as others, Green Mountain has(d) a replacement barrel contract for Uncle and can provide chome lined bores. Don't know if they are actually doing the chrome process or jobbing it out. I was talking to a rep awhile back and he stated the rest of their line was basically taking a back seat to AR barrel production. He also said without saying any names (wink, wink) that they sell a LOT of barrels to the big name 2nd tier guys out there.
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Old 11-22-2012, 12:11 PM
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Quote:
Originally Posted by kendog4570 View Post
Don't know if they are actually doing the chrome process or jobbing it out.
None of the barrel makers chrome in house, but they will send them out to us chrome and handle that for you when you are buying in quantity.
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Old 11-22-2012, 12:40 PM
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Montana Rifleman is also another quality company for barrels.
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