Gun Hub Forums banner
1 - 13 of 13 Posts

·
Registered
Joined
·
47 Posts
Discussion Starter · #1 ·
Hey Folks,

After having a bolt failure in my old IBM M1 that destroyed the receiver. I have a question for my re-build. Which will be a Fulton receiver, barrel, and headspaced bolt.

Should I have a 'Field' (1.250") gauge on hand to check the headspace occasionally? I'm just kind-a paranoid for the future failures.

Oh, I'll use my original barrel to mate with a good USGI receiver and have pared with a matched bolt. I'll pack away this for the future. I'll use the Fulton set-up for range 'plunking'.

I guess my question is; How often should the headspace be checked in a well maintained gun?. Or is checking necessary?

Thanks,,
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #5 ·
Headspace doesn't need to be checked after assembly unless the round count is really high OR the gun is fired with an over pressure round
Charlie P.,

That's pretty much what I thought, but it never hurts to ask. Especially if you are not used to the water temperature in the 'pool' yet.

Thanks again for good advise.

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #6 ·
I've owned a carbine since 1972, have been reading about them since before that, and I think this is the first time I've ever heard the issue of headspace in the M1 carbine raised (unlike several other calibers I could name). :confused:
Snake45,

I'm not completely sure that my failure was a result of 'headspace'. But after I spend the bucks to get my old M1 running again I just thought an occasional 'check' might not hurt.

Charlie Petty suggested that routine checks would not be necessary if a large number of rounds were shot, which I don't foresee me doing anytime soon, or firing an over pressure round.

Thanks for your input it instills additional confidence.

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #8 ·
Besides, most of us end up with more than one and it doesn't hurt to have the gauge for when that next carbine comes around! They are an addiction. *LOL*
smokepole.. I'm already in the 'Club'. I just got to be careful that my wife doesn't use one as a bat on my head.

OK so,,,, over time and a lot of rounds what causes the headspace to change? What grows or shrinks?
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #10 ·
What causes headspace change? Wear is the usual answer, but on rare occasion or with commercial carbines, you can get stretching of the receiver if it is improperly hardened.
Most headspace issues with GI carbines are caused by wear on the bolt lugs and can often be corrected simply by swapping out bolts for a less worn one.
smokepole,

Sorry for a tardy reply. I have had my head somewhere in a dark place. Your input makes good sense.

I think that the 'wear' on the bolt lugs may have caused my failure. This wear on the lugs could have been aggravated by wear on the bolt...(?).

You say I could have possibly swapped the bolt out for a new or less worn one? Wouldn't I have to have 'Headspace' gauges and check the new bolt? If so would just a 'Field' gauge work or should I have the complete set?

Thanks for the advise.
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #12 ·
https://gunhub.com/users/ookedama/
But being a fan of the full automatic M2 version of your M1 Carbine, said operators were required to keep accurate round counts to provide the armours the chance to provide prescribed maintenance to the firearm prior to known failures.
Are you suggesting that during the fierce fighting in WWII battles like the taking of Okinawa, etc, the men using the M1 auto, or similar, would keep track of the rounds that they projected towards the enemy?

I did not ask my family member who gave me his Koeran M1 for his 'rounds down range log'.

But your suggestion is good and when I receive my receiver/barrel/bolt form Fulton Army I will certainly keep copious records of rounds fired.

See Ya,,,, Thanks for the input...
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #15 ·
Maintenance/shot logs are generally kept on sniper rifles and competition target rifles. Most folks don't know what they are. The OP mentioned "M1" without noting rifle or carbine. There may have been some confusion as to which and previous usage.
William,

Gees,,, I have 'target fixation' in my brain about my little M1. I apologize for the assumption that all reading my post would assume that I was referring to the M1 Carbine. I should have been more accurate, sorry and I will try not to create confusion in the future.

Above you reference 'logs' kept on sniper rifles / competition rifles. Saying "Most people don't know what they are." Are referring to the 'rifle' or the 'logs'?

Thank you for taking the time to respond.

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #16 ·
IBM didn't make Garands or BARs during WWII according some internet sites.
csmkersh,

That is nice to know. I'll do some research which should be interesting. Being new to all this I'm still climbing the 'Vertical Learning Curve'.

With the input from you folks on this forum the climb is still difficult, but gives me confidence to continue.

Thanks,,,
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #18 ·
With commercial carbines some soft receivers exhibit wear in the locking groove, so it does happen. But GI receivers were hardened to spec or not accepted. And they were all tested. Most bolts were too. If a headspace problem crops up it is usually either wear on the blot face or chamber wear. IF the carbine was once an M2 conversion, I might be suspicious of chamber wear, but those receivers were normally marked as M2s. When headspace issues do occur in semis, it is usually just an accumulate of minor wear on all parts combined. Pressures are low so those issues are rare.
smokpole,

Good information. Thanks for responding.
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #20 ·
Touche'. And yes, I did refer to the shot log.
William (If I may),

Yes, I knew what you meant, but the Devil made me do the reply... I'm happy that your skin is as thick as mine.

I really enjoy this forum 'cause, as I frequently do, I say things that my brain hears at the same time. Gosh, I gotta stop doing that.

Enjoyed your reply....

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #22 ·
casmkwersh,

Yes that's the venue I frequent often. I swear that Buda and I hear what I say at the very same time more than not.

Sometimes the audience will loudly applaud, but other times it is dead-silent and the egg hitting the floor can be heard.

I try hard to maintain a degree of discipline, but there are times that a 'boy' just gotta be heard...!

Thanks for the reply....

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #24 ·


I have had my 1942 Inland since 1986 and I have put at least 20,000 rounds though it in the preceding decades (and that's a conservative number). In that time I did manage to break an extractor, but that's it. Everything else about the rifle is essentially perfect. My carbine has been amazingly reliable over all those years...and was mostly reliable even when I broke the extractor. When that happened, the extractor broke at the post, so it was completely gone...yet, the rifle still functioned normally for 14 out of 15 rounds in the magazine. I have to say, that impressed the hell out of me!

Now on to headspace, bolts, and broken bolts.
GunGeek,

Great post with large amounts of informative info that will be added to my M1 carbine knowledge base. I gotta say that I am extremely envious of you having been able to 'survey' 11k of these guns. That must have been a real adventure.

I should receive my Fulton Armory matched barrel, receiver, and bolt late next month. The owner's son did stress that the receiver will be properly heat treated and the process today is as good or better than USGI at that time. Anyway, they are a bit pricey, but sound very focused on what they do.

I'm still going to search out a USGI receiver to mate to my IBM barrel. Then I can put the gun back to USGI when I want. Would you have any recommendations on finding a receiver?

Again, I thank you for taking the time to put together such a good post....!

Mike
 

·
Registered
Joined
·
47 Posts
Discussion Starter · #26 ·
Keep an eye open on GunBroker. They show up there from time to time.
smokpole,

Yup, I looked. GunBroker had four displayed. All but one appeared to be black rattle can sprayed. Prices ranged from $199 to close to $500.

Think I'll make an appearance a a few gun shows.... I do appreciate your suggestion.

Later, bye
 
1 - 13 of 13 Posts
Top