Gunsmith for a Garand

Timing for the enbloc release/bolt closure. It is a go/no go gauge thats inserted into.the rifle like a enbloc is. But if your enbloc isn't prematurely unlocking might be a dead end aswell. (Hard to see exactly in your video)

You mention that a certain type of ammo is cycling fine without this issue, im curious if that ammo is "hotter" and giving the rifle more gas to cycle with. And this 7th round failure to feed is fron a short stroke where the bolt doesnt fully clear the round and is causing that tip up and dent.

Any measurements on your op rod Piston tip? Gas cylinder inside diameter is harder to measure unfortunately.
I have this slow mo. Its not the 7th rounds but its might give you some clue.
 
So the fix could be a new gas tube / op rod? The worn barrel certainly doesnt help.
I think the best fix would most likely be replacing the op rod Piston with a oversized one thatll match your gas cylinder. If my theory is correct and this is a light cycling situation.

That video unfortunately doesn't help me diagnose anything sorry! Sick video however.
 
I think the best fix would most likely be replacing the op rod Piston with a oversized one thatll match your gas cylinder. If my theory is correct and this is a light cycling situation.

That video unfortunately doesn't help me diagnose anything sorry! Sick video however.
Are you able to swap just the head. Ive read its doable but not as simple as its may seem. Or simply swapping the entire rod? Is this a project you feel confident undertaking?
 
I sent a rifle to Nick at Vulcan, and he diagnosed it needed a new piston tip. No functioning problems since!

What makes me curious is how an early M1 escaped the arsenal recall and refit orders. Was it already out of US service by then?
 
I sent a rifle to Nick at Vulcan, and he diagnosed it needed a new piston tip. No functioning problems since!

What makes me curious is how an early M1 escaped the arsenal recall and refit orders. Was it already out of US service by then?
If I was a betting man, 90%+ of Garands rifles that have all early parts were assembled like that after the war as a collectors item.
 
I sent a rifle to Nick at Vulcan, and he diagnosed it needed a new piston tip. No functioning problems since!

What makes me curious is how an early M1 escaped the arsenal recall and refit orders. Was it already out of US service by then?
Were you experiencing 7th round stoppage like I am or just general feeding issue? It truly boggle my mind that it only occur on the 7th. What is so different about extracting the 6th an loading the 7th.
 
Were you experiencing 7th round stoppage like I am or just general feeding issue? It truly boggle my mind that it only occur on the 7th. What is so different about extracting the 6th an loading the 7th.
Was I experiencing any stoppages? No. Just routine inspection and repair. The stoppage was a real head scratcher for the US ordnance corps too. I think Hatcher writes about it in his books.
 
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Reading some more into my shop manuals and service manuals. This might be a clip issue aswell.

If you get a chance to meause the clip mouths we can see if theyre in spec, I know you mentioned previously you did but if you could post pics of the measurements and the mfg that would be cool!

.765" +/- .01, but id see if you can pry one open to .775"

.875" when loaded with rounds
 
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Reading some more into my shop manuals and service manuals. This might be a clip issue aswell.

If you get a chance to meause the clip mouths we can see if theyre in spec, I know you mentioned previously you did but if you could post pics of the measurements and the mfg that would be cool!

.765" +/- .01, but id see if you can pry one open to .775"

.875" when loaded with rounds
Will do. But I wont be home until tommorow evening.
 
1 is at 19.1mm/0.752in measure from inside the mouth without applying any pressure with the caliper

2 are at 18.9mm/0.744 in

Brand for the 3 is BRW

When loaded im at 22.0mm/8.66inch. Im not exactly where youre at but I cant messup that part im sitting on the brass.
 

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