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Voodoo6
Optics Apprentice Now With Kung-Fu Grip! Joined: March/29/2009 Location: United States Status: Offline Points: 213 |
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I'd like to eek out a little more accuracy out of my AR barrel, is all. Probably not worth it, huh? |
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"A prisoner of the white lines on the freeway"
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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I noticed that velocity DROPPED considerably after doing it.
That tells me that friction has been reduced and pressure doesn't build as easily before the bullet's gone. I increased the charge slightly, and I think in one case I may have even switched to a faster propellent to get velocity back to where it had been. Accuracy had improved, and cleaning was much easier. Some had been unusually rough bores beforehand, though.
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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You might give Dave Tubb a call to see what he thinks about the chrome thing. I'm sure it's been done by somebody.
If your chrome is really thin, I suppose it's possible to cut completly through it and get down to steel, don't know if that would be any worse than a barrel that had the chrome shot out of it after ten-thousand rounds.
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rifle looney
Optics Master Joined: November/21/2008 Status: Offline Points: 2553 |
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If they ...break in... give them the tip of your barrel?
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SamC
Optics Professional Joined: October/01/2007 Location: USA Status: Offline Points: 902 |
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Isn't he that Alaskan guy who got banned from OT?
Sam
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Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery. Winston Churchill |
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rifle looney
Optics Master Joined: November/21/2008 Status: Offline Points: 2553 |
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YEP!
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BeltFed
Optics Retard Joined: February/12/2008 Location: Ky Status: Offline Points: 22284 |
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The possibility of chrome lined barrels not having the chrome with an even thickness all the way through the barrel is the reason National Match M14s did not have chrome lined barrels. While I don't know how much of a difference it makes now, I think if I had a chrome lined barrel that wasn't performing, I would replace it with a non chrome lined barrel.
As for barrel breakin, I go to the range, shoot, go home and clean the the copper out of the barrel. They seem to get better.
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Life's concerns should be about the 120lb pack your trying to get to the top of the mountain, and not the rock in your boot.
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Voodoo6
Optics Apprentice Now With Kung-Fu Grip! Joined: March/29/2009 Location: United States Status: Offline Points: 213 |
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Yep, my chrome runs long and deep.
The AR shoots MOA now, so that's certainly acceptable by my standards. Sorry for the high jack. |
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"A prisoner of the white lines on the freeway"
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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Another alternative when you end up with a factory barrel that fouls pretty badly is Ultra Bore Coat. It's a fien ceramic in a fairly quick-setting liquid glue, and you wipe it into a clean bore then let it set overnight. Finally you fire maybe 10 rounds through the bore and the ceramic fills all the rough spots that cause the fouling.
I've used it on several barrels now and it really works. One of the barrels I tested it on was a brand-new .223 barrel. First I fired 50 rounds of factory ammo just to see how much fouling built up (quite a bit) then cleaned it down to bare metal and installed the UBC, then the next day shot 10 rounds down the bore to cure it. Finally I cleaned it again (the curing rounds will normally foul the bore somewhat) and shot another 50 rounds. This time there was zero copper fouling.
I've got it in several of my prairie dog rifles, and a couple of big game rifles that were always foulers, no matter how much I cleaned them with JB Compound. It works.
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Kickboxer
MODERATOR Moderator Joined: February/13/2008 Status: Offline Points: 23679 |
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Would that be in lieu of a low jack
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Opinion,untempered by fact,is ignorance.
There are some who do not fear death... for they are more afraid of not really living |
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RONK
Optics Master Extraordinaire Joined: April/05/2007 Location: United States Status: Offline Points: 3199 |
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That's interesting.
For years I've wondered why no one has come up with ceramic-lined barrels, for its ability to shrug off high temperatures as well as it's incredible wear properties. Sounds like somebody is finally taking a step or two in that direction.
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mike650
Optics God Joined: May/14/2006 Location: West of Rockies Status: Offline Points: 14569 |
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“A hunt based only on trophies taken falls far short of what the ultimate goal should be.” – Fred Bear
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SamC
Optics Professional Joined: October/01/2007 Location: USA Status: Offline Points: 902 |
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JB,
Looks like good stuff, Is there any potential problems to keep an eye out for when using this product?
Sam
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Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery. Winston Churchill |
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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Yeah, there are some minor problems. First, the bore has to be completely clean, and I mean no copper fouling at all, and then thoroughly degreased. Otherwise the glue won't stick and the ceramic can't embed in the steel. Then it has to be put in with a slightly loose-fitting cotton patch or, preferably, a bore mop. The people at UBC (www.ultracoatingsinc.com) recommend a mop. Otherwise the stuff gets pushed out of the barrell instead of thoroughly coating the bore. I had this problem when trying to install it in a .204, and it didn't cover the entire bore. But it is also easy to do again, and in larger bores sometimes it takes more than on application. It did in a .338 of mine.
Once it's in there correctly, though, it really lasts--but you can't use a metal bore-brush when cleaning, or you will "uninstall" it, to use computer jargon. But you won't need to, since any basic bore cleaner (even Hoppe's #9) will take out the powder fouling and what copper fouling exists--which is usually none or next to none.
If installed correctly it will last the life of the barrel. Edited by John Barsness - April/23/2009 at 09:23 |
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SamC
Optics Professional Joined: October/01/2007 Location: USA Status: Offline Points: 902 |
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Thanks JB! Sam |
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Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery. Winston Churchill |
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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have 1400 rds to date of moly coated 190 gr smk thru 300 wsm chromed line spr, no break in no cleaning except wiping bolt off, copper fouling is over-rated.
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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I would agree that copper fouling is overrated, but in recent years (since starting to fool with both UBC and certain powders that reduce copper fouling) I have come to conclusion that it makes more sense to coat the bore once that to coat hundreds or thousands of bullets. And UBC does work in chromed bores as well; one of the rifles I've treated is my Bushmaster .223 with simply doesn't copper-foul at all, and hardly powder-fouls especially when used with Ramshot powder. It can be fired pretty much indefinitely without bore cleaning--using conventional bullets. I just talked to one of the representatives of a major rifle firm the other day and they are working with another bore coating that is supposedly even better. Much of this stuff is being developed by the military. |
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magshooter1
Optics Professional Joined: August/27/2008 Location: El Dorado, AR Status: Offline Points: 827 |
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Now that's good info right there!
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Some people are educated BEYOND their intelligence.
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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Sorry, I made a mistake in the website name, which I corrected in my post. It's www.ultracoatingsinc.com.
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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a lot of attention got payed to copper fouling during the 80's when mil surplus 308 became available at really good prices, 4-5 cents, , the bullets used had really high copper contend and would leave a good build up in some guns. so products were developed. among current high count guns, a 6.5x284 with 1200 rds with the only cleaning of the dreaded carbon cone build up around 600 rds, a .223 at 3500 rds, (using TAC) no cleaning except bolt carrier and chamber. I think I'll wait a bit on the bore coatings, and let a couple of you guys get it down.
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