AR Sponsor
Posted: 5/1/2005 4:38:37 PM EDT
|
I just finished building a new upper the other night, and was doing some manual function testing. The rounds fed fine, but there was a lot of sticking when trying to pull the round out, some so bad that I had to pound on the charging handle or use a rod to knock the round out. I have a forster NO-GO headspace gauge for .223 Rem, length of 1.4666. I tried the gauge and the bolt will not close on it. I tried it in the other uppers I use, and they all lock up fine. I switched bolts around, and with the new barrel, it still will not close on the gauge. This is a brand new M1S barrel, government profile non-chrome lined that has never been fired. Since my other guns will close on a NOGO gauge, but this one won't, is that a headspace problem that can be fixed, or is it something that will just wear in after I shoot it a bit? I wanted to ask here before I live fire the thing and blow my face off. 
|
|
The "NO-GO" means that it should NOT close. A "GO" gauge should go, and a "NO-GO" should not go. The ones that close on a "NO-GO" have a little longer headspace. If they also close on a "FIELD" gauge (which is longer than a "NO-GO"), then it's about time to retire the barrels, although new bolts might correct it. |
Yeah, that's what I would have thought originally, however one of the rifles is a Colt carbine that I bought new and has less than 2000 rounds through it. I cannot believe that it is worn out. Isn't the problem with headspace usually from too much length? If the chamber is too short, the rifle won't lock up. |
|
Your biggest concern would be too short a chamber. A longer chamber can be used, and even those swallowing a field gauge can still be fired. Check out this thread: www.ar15.com/forums/topic.html?b=3&f=118&t=233029 |
Another one: www.ar15.com/forums/topic.html?b=3&f=66&t=234560 |
AR Sponsor