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#1
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Fitting 10-22 barrel
Bought a Green Mountain bull barrel for a 10-22 receiver I had.
Previous 2 stock barrels installed with no hitch. By hand, I cannot fit the barrel in far enough for the screws to engage the threads by 1/4”. I lubed the barrel and receiver to no avail. Thought I would ask for advice, before striking with a mallet.
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Actually I only started collecting Milsurps 3 years ago. I think I might own about 24...They're cheaper than guns that will most likely never get the opportunity to kill somebody... I belong to the group that uses firearms, and knows which bathroom to use. Tis better to have Trolled & lost, Than to never have Trolled, at all. Secret Club Member?. |
#2
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Don't force it you can crack the reciever or gall the barrel. I like to throw the barrel in the freezer for a couple hours. It will shrink the shank up a bit. Then right before install I heat up the receiver a bit with a heat gun or hair dryer. They will slip right together.
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"Better to be judged by twelve than carried by six" |
#3
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Quote:
It will expand. Aluminum expands more than twice as much as steel with the same change in temperature. That means that warming up a reciever by just 120 degrees will get you 4x the change in part size than chilling a barrel by 70 degrees in the freezer.
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Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available. |
#4
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Quote:
The freezer is not shrinking the barrel appreciably. Going forward, you can skip the freezer and just heat up the reciever. Your results will be the same as if you had chilled the barrel, but your barrel will not get rusted from the condensation you cause by chilling it and letting it come back to room temperature.
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available. |
#5
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Quote:
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"Better to be judged by twelve than carried by six" |
#6
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Good Thing I’m adept at removing and installing the trigger and bolt assemblies.
__________________
Actually I only started collecting Milsurps 3 years ago. I think I might own about 24...They're cheaper than guns that will most likely never get the opportunity to kill somebody... I belong to the group that uses firearms, and knows which bathroom to use. Tis better to have Trolled & lost, Than to never have Trolled, at all. Secret Club Member?. |
#7
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Quote:
If you heat up BOTH the barrel and the reciever, they will stay loose longer. If you freeze the barrel, the barrel will quickly cool the reciever and that will make them shrink together even faster than if the barrel is left at room temperature and the receiver heated up.
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available. |
#8
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Measure the new barrel with a micrometer, and compare it to the old ones that fit. I bet the new one is too fat. The new one should be machined to fit properly. It is probably a very minor adjustment. It does need to be done in a lathe.
IF you heat, chill and wack, you will have an unitized barrel and receiver. They will probably not be aligned properly when the temperatures equalized. At that point you have a serious mess. |
#10
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Quote:
That's WHY barrels are being made slightly larger than a factory barrel and why aftermarket 10-22 receivers have a slightly smaller barrel bore than factory 10-22 receivers. This is all done on purpose to make them more accurate. No need to undo all that work. Just shrink fit them...
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available. |
#11
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Hence why I said to make sure you have something to align the barrel before the receiver shrinks!
You can always warm the reciever back up and turn the barrel into alignment after the reciever has shrunk.
__________________
Randall Rausch AR work: www.ar15barrels.com Bolt actions: www.700barrels.com Foreign Semi Autos: www.akbarrels.com Barrel, sight and trigger work on most pistols and shotguns. Most work performed while-you-wait, evening and saturday appointments available. |
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