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As mentioned on another thread I finished up a frankengun in .300 Blackout.
I have to have the headspace checked Sat by a shop not too far away.
How often do they go together and two different manufacturers barrels and bolts not headspace correctly?
Mike
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P.S.
If I start doing this on a somewhat regular basis will buy my own gauges I guess.
Mike
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Not sure about the 300BO barrels but quality .223/5.56 bolts and barrels headspace correctly 99% of the time. I measured fired cases from 6 different barrels once and all headspaced within .002". Thats pretty darn tight tolerances considering all were mixed and matched.
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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the black out uses a 5.56 bolt, whose barrel did you use?
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Very rarely, especially if you are using mainstream brands IMLE. Unless you need match level tolerances, shouldn't be an issue.
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I used a JSE barrel and Palmetto bolt and carrier.
Mike
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64
it's a fun gun to plink and play
Mike
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I'm sure that it won't be too far out to deal with by adjusting your sizing die.
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I used a JSE barrel and Palmetto bolt and carrier.
Mike Mike - I doubt you will any problems with the PSA BCG, they seem to hold up well. I have had an issue with one JSE barrel in 6.8 SPC. Over-gassed and a rough chamber that took some work to get right. Data point of one, and I haven't had any issues with anything else I have ordered from them.
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Good news after I ordered it I have seen they have mixed reviews.
Mike
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Barry
I don't want to even fire the thing without checking it. The shop is a 30 minute drive to and we are going there this weekend anyway so I want to ere on the side of caution.
Mike
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Islam is a terrorist organization.
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No, the shop I took it too said they used a gauge for the first hundred or so rifles they assembled without any of them ever being bad and quit checking them!
Mike
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Went to the range after work and put 4 rds through the rifle by headlight!
Brass filled out perfectly, did not have enough umfff to drive the bolt back far enough to pickup the next round, had to cycle by hand.
Guess I need to find a weaker spring or lighter buffer. Just using standard carbine stock parts.
16" unsuppressed, Rem factory 125gr loads. Brand new upper and bolt carrier group so still not the slickest yet.
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#31 drill bit through the gas port
.... like tears in the rain
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Will it hurt later when shooting suppressed?.
Mike
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Don't drill your gas port yet. That's always a last resort because it's permanent.
Try a lighter buffer, more lube on the BCG, make sure your existing has block is aligned.
Last edited by CBMJR; 11/19/14.
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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Don't drill your gas port yet. That's always a last resort because it's permanent. Nonsense, #37 drill, 5-44 tap and set screw, allen key, lock-tite, and your back to no port at all...doesnt take too much imagination to guess what has to happen after that. Then again, the shortest distance between too much gas and the perfect gas pulse is an adjustable gas block. PRI makes a nice one.
Last edited by AKA_Spook; 11/19/14.
.... like tears in the rain
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Thx for all of the help men, I will get back to the range with a decent amount of time this time and try some spare parts.
Mike
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