| Posted: Wed Oct 14th, 2009 11:42 PM |
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21st Post |
GUARD DOG
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Go on the Midway website and check out a fire lapping kit. I think Wheeler makes it. It consists of 3 levels of polishing compound and an application system. (The polishing stuff looks like valve grinding compound.) You coat some bullets and fire them, polishing the bore. I used this on a Ruger 44 Mag that had some light pitting in the last inch of the barrel. It cleaned up nicely and accuracy improved. I also used it on a badly rusted 30-30 barrel. It went from 10" groups at 50 yds to 4".
"If you are not a liberal when you are 20, you have no heart. If you are not a conservative at 40 you have no brain."
W. Churchhill
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| Posted: Wed Oct 14th, 2009 11:56 PM |
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22nd Post |
ghrit
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Rockydog wrote: Fryboy, I've heated nuts and cooled bolts to get them loose many times. But in the case where a shoulder is involved and may have as much friction as the thread I think one might have to think about the fact that shrinkage is not one dimensional. Certainly the threads will get smaller but will they not also get shorter drawing the barrel shoulder closer (tighter) to the action? I think one should avoid heating actions at all cost. The risk of changing the temper of an action is too great to warm them much hotter than a heat gun IMO. Then again, I'm no metallurgist by far. RD RD, you are on the right track. See http://7.62x54r.net/MosinID/4501.jpg which shows a shoulder. The only thing heating and cooling might do is cycle the joint a bit, which might (and only might) loosen it up a touch. Betcha not. A long soak in kerosene might do better at easing the brute force that will be needed. Those puppies are tight and have had plenty of time to become pressure welded to one another. I suspect, but do not know, that the alloys in the receiver and barrel are different, and without knowing what they are, predicting the effects of heat cannot be done. For sure, overheating is going to do bad things.
____________________
Remote locations are cheap insurance.
30-06 - billions served
There are two kinds of ships: Submarines and targets
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| Posted: Thu Oct 15th, 2009 12:39 AM |
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23rd Post |
72coupe
HB certified Master Handloading and Ballistics advisor
| Joined: | Sun Jun 11th, 2006 |
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When and if I get ready to do it I will take your suggestion and grind the shoulder off the barrel shank and soak it in liquid wrench.
____________________
Reloader since 1969.
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| Posted: Thu Oct 15th, 2009 01:42 AM |
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24th Post |
| Posted: Thu Oct 15th, 2009 04:05 AM |
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25th Post |
72coupe
HB certified Master Handloading and Ballistics advisor
| Joined: | Sun Jun 11th, 2006 |
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Thanks Fryboy, very interesting.
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Reloader since 1969.
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| Posted: Thu Oct 15th, 2009 08:30 AM |
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26th Post |
fryboy
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http://7.62x54r.net/MosinID/MosinBarrel.htm
perhaps this helps ?
____________________
(happy shootin'-the best way to get empty brass!)
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| Posted: Thu Oct 15th, 2009 01:33 PM |
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27th Post |
ghrit
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| Location: | Endless Mountains, Pennsylvania USA |
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Since you guys already found the site, take a peek at this when you have a couple minutes to waste and want a snicker to go with your morning coffee.
http://7.62x54r.net/MosinID/MosinHumor.htm
____________________
Remote locations are cheap insurance.
30-06 - billions served
There are two kinds of ships: Submarines and targets
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