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Joined: Mar 2014
Posts: 3,344
Campfire Tracker
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OP
Campfire Tracker
Joined: Mar 2014
Posts: 3,344 |
Put on a ranier barrel, 18" with midlength gas system, on DPMS LR308, and a brake.
Brass is ejecting back at me hard and bouncing off the brass deflecteor, which has chipped the paint at the sharp edge of the brass deflector and also put a consistent small horizontal crease in the fired brass.
Too much gas I assume???
I got an adjustable gas block installed for that but the sweet spot must almost non-existent. Choke it down and it does not fully eject.
Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven.
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Joined: Mar 2014
Posts: 3,344
Campfire Tracker
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OP
Campfire Tracker
Joined: Mar 2014
Posts: 3,344 |
Pig tail gas tube?
Get a super heavy buffer weight? Who what where for that?
How small is the sweet spot on this set screw adjustable gas blocks? I swear it must be less than 1/8th of a turn I am seeing the jamming and then the slamming. Arg.
Arg is pirate talk for "I am frustrated."
Arg arg.
Anybody else been through this?
Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven.
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Joined: Nov 2011
Posts: 30,955
Campfire 'Bwana
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Campfire 'Bwana
Joined: Nov 2011
Posts: 30,955 |
Yes, I'd start with a heavier buffer weight, and perhaps a different buffer spring.
You didn't use logic or reason to get into this opinion, I cannot use logic or reason to get you out of it.
You cannot over estimate the unimportance of nearly everything. John Maxwell
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Joined: Jan 2010
Posts: 2,621
Campfire Regular
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Campfire Regular
Joined: Jan 2010
Posts: 2,621 |
I put a fuzzy side of velcro on the brass deflector to save my brass.
To set your gas block, set it so that it just barely doesn't lock the bolt back on an empty mag. Then open it back up 1/2 a turn. That should be the sweet spot.
For buffer and spring, I am using the JP SCS and absolutely love it.
Last edited by CBMJR; 07/28/14.
John 8:12 "I am the light of the world. Whoever follows me will never walk in darkness, but will have the light of life."
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Joined: Sep 2009
Posts: 13,860
Campfire Outfitter
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Campfire Outfitter
Joined: Sep 2009
Posts: 13,860 |
Yes, I'd start with a heavier buffer weight, and perhaps a different buffer spring. This, see if Sprinco offers something for 308 AR's
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Joined: Jan 2005
Posts: 57,475
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,475 |
The fuzzy side velcro and a few coils off the ejector spring would be a start. So that the ejector, when unpinned, sits about 1/8 inch or so IIRC, above the face of the bolt.... I'd have a spare spring handy before I clipped though....just in case.
Too much gas generally shows as lifted rims on firing, IE opening the bolt before the brass shrinks.
Just a slap on the gun, nick the anodizing and ding the brass... every last AR I've had would do that if you didn't play with them a bit and soft coat the deflector.
You'll find if you trim the ejector spring too your brass falls in neater piles, and generally starts falling almost in front of you instead of way off and behind you...
Ours were tuned that if you knew where to place a cap in say sititng rapid fire, all cases would be in the cap after 10 were fired....
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Mar 2014
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Campfire Tracker
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OP
Campfire Tracker
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Done in Convention by the Unanimous Consent of the States present the Seventeenth Day of September in the Year of our Lord one thousand seven hundred and Eighty seven.
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