Head space nightmare 5.56 NATO 2
I chambered a round in there with no issues. No markings on the round and it was exactly like all the rest of the rounds in the box when I pulled it out.
Bottom line, should I buy a new bolt?
Bottom line, should I buy a new bolt?
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Tie it down and shoot some with a lanyard. Inspect the spent rounds carefully. Same for the bolt when done. 0 -
One of my buddies was babbling about this, this weekend to a gunsmith. He was asking if it was more of the face (primer end) that was important. And this gunsmith said it was more important on the neck end.
So basically from what I heard (half listening), is to drop a round then the bolt on top of the round and turn the barrel nut home. At least that's what I think I heard [:D].0 -
"No Go" won't chamber.
"Go" is tight.
This is a non issue. You simply have a tight chamber. As long as ammo fully chambers and the bolt head can lockup, no issue.
If ammo wants to hang up, have a gunsmith hand turn a finish reamer .002" or .003" deeper.0 -
MG has this nailed, when it comes to rifle chambers (and other things[;)])...tight is good. as long as it will chamber factory ammo you are good to go 0 -
7.62x39Lover,
quote:"Go" is tight.
This is a non issue. You simply have a tight chamber. As long as ammo fully chambers and the bolt head can lockup, no issue.
This is not true in any AR-type platform. Tight headspace will lead to malfunctions and failure to feed issues.
These are gas guns where the plasma from the burning powder is used to eject the case and chamber the next round. This involves a lot of fouling which really adds to the existing problem (tight headspace) only faster.
You need 2-3 thousandths in excess of headspace and a slightly larger chamber from the start. The reamer used is aptly named for it's use, 'auto' or 'semi-auto'. While this seems counter intuitive compared to bolt action rifle chamber fitting, it is necessary for the rifle to run consistently.
It gets even more tricky when you add a can and then an adjustable gas block.
Best.0 -
Let us know how it runs. Doubt very much you will find any ammo that is manufactured so close to maximum dimensions that it will cause a problem.
This is assuming that you are not going in to battle. If you are, then by all means open the chamber up so that the rifle can digest anything, dirty or hot.
Otherwise, it's a nonissue. Headspace is only relevant to the ammunition dimensions.0 -
"This is not true in any AR-type platform."...........while I don't claim to be an 'AR' expert I have worked with them since 1969 (MOS 45b20, small arms repairman). From the original posters comments that the bolt would closed on the 'go' with some effort I surmised the chamber is at min. spec's. As this rifle isn't going into combat it should function just fine with mil spec ammo, and with a little break-in it will be right where it should be. 0 -
Thank you guys so much for all the input. You guys always have excellent advice. I will take this puppy to the range and inspect the spent brass and the chamber after firing. I think it will be just fine. If I have any issues I will have a gunsmith look at it for me. I really don't anticipate any issues.
Thanks again guys!0
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