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chamber chroming

 
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  #8  
Old 09-03-2013, 07:04 AM
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Re: chamber chroming

Ok,, set it back. What about the gas port location? So, enough money can fix anything, but spent on a Rem ington 7400? I don't believe I've ever seen one , in any caliber, that'll do much more than shoot a shotgun pattern.
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  #9  
Old 09-03-2013, 10:17 AM
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Re: chamber chroming

first of all, to chrome plate the chamber is going to be a bear to get right. Yet it can be done. You simply can't put three thousandths all the way around on the barrel. The chrome won't stay put (probably won't if done right as well). You need a minimum of a .008" coating after it's finished out, and .012" would be a lot better. The idea of doing it will end up being very labor intensive. You simply can't just plate a small part of that chamber on a whim. It will involve cutting the chamber about fifteen to twenty five thousandths oversize (all the way around). Then you must mask it off (they'll have a lot of not so nice words for you by the way), and copper plate the areas to be chromed. Then you go back in there and re mask the chamber area again, and strip the remaining copper. Now you are ready chrome plate the chamber.

Ok now you got this plated up barrel, so how do you fix it? Forget using a reamer or a lathe. Stuff is too hard. You'll need to grind that chamber, and now the cost rises like the Apollo Moon Rocket! Plus I'm not sure they would ever get the shoulder to case body area right. But to further mull up this grand scheme, the chrome won't stay put in the chamber. The heating and cooling from shooting will assure this issue alone.

There is a really nice spray metal process that actually is machinable . Also expensive. I've used this process in the past, but it's also not recommended! The other way is electroless nickel. There are two kinds, and one plates within fifty millionths, but the chamber is bad.

I'd simply forget repairing the barrel! Also are you sure the chamber is actually in the form you say? In an auto, the chambers are often cut differently than a bolt gun. They're usually oversized and tapered to aid feeding. I'd send the rifle back to Remington, and let them fix it. I can't see how anykind of a brush could do that much damage (maybe stainless steel). If the rifle shoots OK, I'd just live with it (most I've seen shoot 1.5" groups or worse)
gary
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  #10  
Old 09-04-2013, 12:54 PM
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Re: chamber chroming

How did you determine it is .003" oversized?
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  #11  
Old 09-05-2013, 05:56 AM
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Join Date: Jan 2012
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Re: chamber chroming

Ok, here is the info on the rifle. Starting with a clean rifle. The first cartridge fired will ejectand reload fine, second fired the extractor will pull so hard to get the spent case from the chamber it will slightly bend the lip on the head of the case. each case after that will get bent more until the extractor will rip a notch out of the case and not extract the spent case. Usually the third or fourth case will not eject. All factory loads.
Case info is as already stated the rim is progressively deformed. In addition looking at the case from the side starting at the head the first inch is clean as new, the remainder of the body is discolored. The mouth of the case looks normal. When I measured the case it appears the it is bellied in the middle (discolored area) more that the end (cean area) by around .003.
The reason I am trying to fix this thing is my son requested this exact rifle as his first deer rifle. I had one as my first big rifle as well which he did not know until after he choose it.
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  #12  
Old 09-05-2013, 06:38 AM
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Location: Great Falls, MT
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Re: chamber chroming

If you're willing to pay the cost to accurize it, check out Rifle Accuracy Systems Inc Custom Accurate Rifles Barrel Conversions Ruger Mini Remington 700 7400 750 AR10 AR15

or

Call your local Remington Service Center. They can replace the barrel with a factory barrel, if anyone can.
http://www.remington.com/pages/suppo...-services.aspx


Good luck!
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  #13  
Old 09-05-2013, 09:18 AM
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Re: chamber chroming

Thanks. Only thing is it's not a problem with the barrel. The gun shoots great as a single shot. The problem is the chamber.
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  #14  
Old 09-05-2013, 12:49 PM
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Re: chamber chroming

THE CHAMBER IS PART OF THE BARREL!!!! You cannot seperate the two!
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