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polishing compound for cleaning a barrel
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It is just a thought but if polishing compound doesn't hurt a cars paint would it be safe to use on a barrel to remove hard fouling. people use bullets inpregnated with abrasives. Just a thought. What do the experts say.


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Posts: 340 | Location: South Carolina | Registered: 14 December 2010Reply With Quote
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It would probably be safe but I don't how effective it would be. I think you'd be better served using JB bore cleaner.

http://www.brownells.com/.aspx...RE-CLEANING-COMPOUND
 
Posts: 8169 | Location: humboldt | Registered: 10 April 2002Reply With Quote
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+1 for JB--I've never seen bullets recommended for cleaning fouling--some people use them for what's called fire lapping-- a barrel smoothing and break in for those who for some reason don't care to spend the same money for a hand lapped custom barrel, or possibly for those who think that sponging out a barrel with solvent every other round will somehow magically smooth the bore. These people also mistakenly think this is "breaking in" a barrel. Neither the magic solvent nor the magic bullets will cure a bore that varies significantly in diameter down its length--this is the reason some folks insist on buying air gaged barrels.


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Posts: 494 | Location: The drizzle capitol of the USA | Registered: 11 January 2008Reply With Quote
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amamnn I was not talking about cleaning I was referring to polishing the bore. David Tubbs salec bullets inpregnated with abrasives. I was wondering if you could polish a barrel smooth to help with cleaning and accuracy.


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Posts: 340 | Location: South Carolina | Registered: 14 December 2010Reply With Quote
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JB Bore compound gets my vote. I use it on new barrels before i ever shoot it. About 20-25 patches for around 40 strokes per patch and they seem to be easier to clean from the very beginning.
 
Posts: 4214 | Location: Southern Colorado | Registered: 09 October 2011Reply With Quote
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I can confess I have tried it. I don't know if harm was done. I seemed no more or no less aggressive than the JB Bore Paste I was all out of...
It seems the opinons on even that product, JB, range widely.
dmw


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Posts: 2135 | Location: Where God breathes life into the Amber Waves of Grain and owns the cattle on a thousand hills. | Registered: 20 August 2002Reply With Quote
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Possibly I was confused by the title of your post which was "polishing compound for CLEANING a barrel" I guess I can't read or you can't spell---or someone hacked your title and post and substituted that word in it--wonder which?


All that aside-- I just got out my polishing compound which I use for finishing stocks and read the ingredients. The very first thing mentioned was aluminum oxide, which is the compound that makes up my oil stones, which I use for polishing triggers, sears, and the like. I would not care to use that stuff in a barrel as I would not have proper control over how much metal was removed from the lands and how much rounding was done on the grooves of the rifling.

IMHO a better solution to the whole problem is buying a hand lapped, air gaged barrel in the first place.


If the enemy is in range, so are you. - Infantry manual
 
Posts: 494 | Location: The drizzle capitol of the USA | Registered: 11 January 2008Reply With Quote
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Amamnn maybe I could have worded my subject better. I'm sorry it was miss leading for you. I do appericate your in put it seem to be well thought out.


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Posts: 340 | Location: South Carolina | Registered: 14 December 2010Reply With Quote
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Lapping compounds generally use aluminum oxide or a similar abrasive so yes, it will polish the bore. The problem arises in which compound has exactly what grade abrasive. You're working in the dark and at risk of wasting hours with a product that is too soft or too fine to be efficient, all the way to possibly damaging the bore before you realize it.

Personally I always wondered if the extrusion polishing process they use on performance head intake ports could be adapted to lapping bores on a commercial scale. Anyone know?

If you stick with products proven for the purpose you'll have no risk. OTOH if you like to experiment and don't mind the risk, I'd like to know what you find out.


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Posts: 11137 | Location: Texas, USA | Registered: 22 September 2003Reply With Quote
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I once polished the bore of an old lightly pitted Mauser barrel with medium fine polishing stick mixed to a slurry with gun oil. It is now mirror bright and drives tacks. I used a worn .22 cal cleaning brush with a 1 inch length of outdoor extension cord insulation wrapped around it to make a lap. The bore was first oiled and the lap inserted from the breech. It was then pushed halfway out the muzzle and coated with the lapping compound. The vinyl insulation molded to the lands and grooves and did a fine job.
 
Posts: 3672 | Location: SC,USA | Registered: 07 March 2002Reply With Quote
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Hello, The thing about JB is that it is non-imbedding..something you can not be sure of with other abrasives. JB does make a finer compound called Bore Bright..used for polishing after regular cleaning.
 
Posts: 44 | Registered: 06 March 2012Reply With Quote
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I don't think that abrasives should be applied to the bore of a barrel.
If your are trying to make a POS barrel a good barrel, you should have gotten a better barrel. Send it back.
If you are trying to make a good barrel better, buy a better barrel.

I cannot imagine anything as haphazard as fire lapping being of any benefit.


I'd be willing to bet that no barrel manufacturer recommends that you use any abrasives in their barrels??
Most of those bulging bicep professional barrel lappers have been replaced with CNC lapping machines!


Rusty
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Posts: 9797 | Location: Missouri City, Texas | Registered: 21 June 2000Reply With Quote
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Amen! tu2
Grinding paste has no place inside a barrel.
 
Posts: 2848 | Registered: 12 August 2002Reply With Quote
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quote:
Originally posted by Rusty:
I don't think that abrasives should be applied to the bore of a barrel.

AGREED!...if it is a "good" barrel.


If you are trying to make a POS barrel a good barrel, you should have gotten a better barrel. Send it back.

But whether it is a good barrel or not may not be known until you have tried it out. And sometimes sending it back does no good...even though it only shoots 3" 3-shot groups for for the manufacturer, they say there is nothing wrong with it and return it unreplaced and unimproved. Been there. Experienced that; with Bushmaster.


I cannot imagine anything as haphazard as fire lapping being of any benefit.

Perhaps not, but sometimes we have to stretch our imaginations. I own that POS barrel which would not shoot 3-shot groups tighter than 3" at 100 yards and which Bushmaster refused to replace with a good one. So, in desperation I tried fire-lapping. After that it shot (and still shoots) 1 MOA 10-shot groups at 100 yards. So it is still on my AR.
 
Posts: 9685 | Location: Cave Creek 85331, USA | Registered: 17 August 2001Reply With Quote
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One reason I NEVER BUY A USED rifle without scoping it first.... Never know what someone has done to the tube....
 
Posts: 1004 | Registered: 08 November 2005Reply With Quote
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any of you used KG2 bore polish? it worked wonders in my old 7x57 barrel
 
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