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Post by azranch on Dec 26, 2013 20:08:25 GMT -5
I have a 24V .222 over 20 ga. and it has a headspace problem. I am getting separation on the .222 casing's and it seems to have excess recoil for a 20ga. I have made a chamber cast and it mics out OK. There is a VERY small amount of movement when the gun is closed, held in an upright position and pressure is exerted on the barrels. The main pin at the front of the action mics at .373". I am new to this forom and if this has been addressed before I apologize, but I could not locate this problem in the archives. Any info would be appreciated.
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Post by captcapsize on Dec 27, 2013 8:54:57 GMT -5
I am by no means an expert on the matter but off hand I would suspect someone reamed the chamber to .223.
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Post by azranch on Dec 27, 2013 9:14:51 GMT -5
Thanks for the suggestion, but I made a chamber cast and it matches the SAAMI spec +/_ .001. Do you know what the "Hinge Pin" diameter was when these left the factory?. It's a neat gun and I'd like to use it, bought it at a pawn shop in not so great condition (obviously) for $ 100.
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Post by cw on Dec 30, 2013 11:38:14 GMT -5
Thanks for the suggestion, but I made a chamber cast and it matches the SAAMI spec +/_ .001. Do you know what the "Hinge Pin" diameter was when these left the factory?. It's a neat gun and I'd like to use it, bought it at a pawn shop in not so great condition (obviously) for $ 100. Head space on this style gun is determined by the depth of the chamber. Have you looked at a seated round? It should be flush or ever so slightly below flush.
Also if your correct and it is the pin there will be noticeable and measureable ''slop'' when the action is closed. Have you measured it?
IINM that pin should be .375
CW
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Post by txbob on Dec 30, 2013 13:35:34 GMT -5
I have a 24V .222/20 Ga. and I measured my pin and it measures .3735 to .374. With the action closed a .0015 feeler gauge
will not fit between the barrels and the face of the receiver Check this on yours. Also I would look at the ejector. My ejector for the rifle barrel has a small pin extending out of the side and this pin catches the rim of the shell for ejection and also appears to limit the depth of the shell will seat in the chamber. With the barrels off I tried 3 different brands of ammo. Hornady V-Max,
Lellier & Bellot,and Winchester Super-X and all 3 brands seated flush. If all these things check o.k. I am not sure what else
to look at. Let us know if this has helped or not.
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Post by ocddeerhunter on Dec 31, 2013 16:11:33 GMT -5
You got this from a pawn shop BUT DID you clean the barrel Before test fire if it had'nt been cleaned by the first owner a badly fouled barrel could cause high pressure and split a case (you never said what brand ammo it was or was it a reload.the other thing you can do is buy a go and nogo set of gauges from brownell's its 2 gauges that look like cartages go should fit and close the gun thats good BUTif the no-go will fit then the chamber is too deep.If thats what happens if you reload you can still use the gun you just have to fire form cases too fit the gun then only use those cases .to fire form case prime and put a light powder charge 10 % less than lightest charge in load book thanfill case with cream of wheat dry NO bullet put case in gun pointed vertical and shoot up in air (thats how I fire-form 7/30 waters from 30/30 after resizeing the neck in the 7/30 die case has 2 shoulders till I shoot cream of wheat then the shoulder pushs foward and I resize and load over this time with a bullet and shoot at range then reload to make hunting loads .
You never said if you reload or not but the fired cases from this gun should be checked 1.387 to the start of the neck where the shoulder meets the neck if someone tried to rechamber to 223it will be 1.557 or 222 mag 1.586 .
never use steel cased ammo (wOLF) STEEL CASES CAUSE PROBLEMS CHEAP AMMO IS NEVER A GOOD DEAL .
If it has a really SHORT throut (distance bullet has to jump till it touchs rifling ) maybe the bullet is touching rifleing as you pull trigger that would make a high pressure spike and break the case .if you reload make a "dummy case of this gun take a UNPRIMED CASE NO POWDER AND SEAT THE BULLET LONGER THE NORMAL SEE IF YOU CAN CLOSE THE ACTION IF NOT SCREW BULLET SEATER DOWN A LITTLE AT A TIME 1/4 TURN AT A TIME UNTILL YOU CAN CLOSE THE ACTION NOW MEASURE WITH THE STONEY POINT TOOL FOR .22 CAL THAT GIVES YOU THE LENGHT FROM BOLT FACE OR WITH A SINGLE SHOT HINGE ACTION LIKE A 24 THE DISTANCE FROM RECIVER TO THE START OF THE RIFLEING .IT BEING TOO SHORT IS A REAL LONG SHOT THAT WOULD HAVE HAPPENED WHEN IT WAS BUILT SAVAGE WOULD HAVE CAUGHT THAT.
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Post by azranch on Dec 31, 2013 19:27:38 GMT -5
Thanks for the info. A TEMPORARY shim on the pivot pin cured the problem. I was contacted about this on one of the gunsmith sites and the info is the same as you gave me. Fit-up was not sloppy and that was what fooled me. Thanks again,
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