June 6, 2021, 08:58 AM | #1 |
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JB bore cleaning compound
I have about 500 rounds thru my savage 223 bolt gun, only boresnaking it when i get home from the range. Now im cleaning it to put it back in the safe, Im using JB bore cleaning compound and this is my second day of running patches thru this gun and they are all dark black still. How many hundreds of patches of this stuff does it take to have the patches come out clean? Im doing the method it describes on the jar, about 10 strokes with the compound and then a patch with Hoppes solvent and 2 dry patches then repeat.
My arm is getting sore. |
June 6, 2021, 09:25 AM | #2 |
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JB is mildly abrasive, so like any metal polish, it will turn a patch black by picking up tiny particles of barrel metal. Try rubbing a patch with a little on a nail or other piece of steel and you can see it blacken. As a result, there is no way to get a white patch through the bore. If you are concerned there is still copper fouling left behind, you want to get a bore cleaner that turns blue when it acts on copper. If you are concerned there is still carbon present, Slip 2000 Carbon Killer is probably the best choice for you. JB will get it, and with a new barrel that polishing action can help reduce surface friction so copper sticks more gradually. It doesn't polish fast enough to change bore dimensions significantly during normal barrel life, though custom barrel makers recommend you don't do anything that changes the lapped surface roughness they leave in the bore at the end of their work on it.
What I do is put Bore Tech Eliminator in a small pump sprayer and at the end of my range session or match, I pump two or three squirts into the chamber and watch it run down to the muzzle. I put silicone stoppers in the muzzle and chamber and then put the gun in its case and go home. By the time I get there the gun is mostly if not entirely clean and I patch it out and repeat and let it sit an hour and patch it again, just to be sure. The Bore Tech product attacks copper so quickly that it will turn a brass jag light blue as you push it through the bore, so they make a special alloy jag called a Proof Positive jag you can get. But a plastic jag will also not react with the chemistry if you have one in .22. This is not really a reloading question, so I will move the post to the Gear and Accessories forum, since cleaning items are accessories.
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June 6, 2021, 10:54 AM | #3 |
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Consider JB Bore paste to be BRASSO for barrels.
It will always turn black when rubbed onto metal. Clean cloth/patches will then reveal a polished surface. |
June 6, 2021, 11:41 AM | #4 |
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No, stop, don't! Jb is a mild abrasive. That dark black is metal you are removing from your barrel.
I use jb bore paste, but sparingly and only when needed and only after using regular cleaners. I use a regular bore cleaner. do a couple passes. If there is still some stubborn stuff in the gun that I just can't get out, then I break out the paste. But only one cycle, of 5-10 passes max.
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June 6, 2021, 12:04 PM | #5 |
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Thanks for the info, geez, my barrel could be toast then, cuz i run about 200 patches thru it and a third of them were coated with JB bore paste.
I guess I will find out next time I take it out, It was a very accurate SS 26 inch, 1 in 7 twist. |
June 6, 2021, 01:40 PM | #6 |
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Burning powder wears out the barrel 123.4 times as much as JB does.
My barrels that were frequently cleaned with JB lasted as long as those that weren't. |
June 6, 2021, 03:03 PM | #7 | |
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I think JB its a great product. However on my scale of my cleaners, it is the most aggressive. I always try to use the least aggressive first. Barrel safe ammonia free bore cleaners and a brush. If there is still copper in the bore after 2-3 session of that I will do one set of 5-10 passes with the JB bore past. Followed by 40-60 passes with JB bore bright.
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June 6, 2021, 05:09 PM | #8 |
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JB also makes a red bore bright which is a lighter abrasive for finishing bore treatment--I use both the paste and bore bright a lot.
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June 6, 2021, 07:21 PM | #9 |
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June 6, 2021, 10:23 PM | #10 |
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Do you have some empirical bore dimension data that could be used to confirm or refute any information provided?
If you do, please provide it. If you don't, what's the point of even asking the question?
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June 6, 2021, 10:56 PM | #11 | |
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If anyone can prove it damages the bore, tell Brownell about that. https://www.brownells.com/gun-cleani...-prod1160.aspx Last edited by Bart B.; June 6, 2021 at 11:19 PM. |
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June 6, 2021, 11:01 PM | #12 |
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It's even more easily proved by looking at the metal removed on the patches. I don't see any claims about how much dimensional change results.
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June 6, 2021, 11:04 PM | #13 |
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I do not shoot the 223. bolt, but for everything else, I use wipe-out. No scrubbing and few patches.
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June 7, 2021, 12:54 AM | #14 | |
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Will JB cause noticeably faster accuracy degradation or bore damage when used as directed? I seriously doubt it--and I don't see anyone on this thread making that claim. The context of this thread is someone doing literally hundreds of strokes through the bore with an abrasive in a single cleaning. No one has said that JB shouldn't be used, only that it should be used as directed. I think we can all agree that neither the makers of JB nor Brownells recommends 600+ passes through the bore in a single cleaning with JB.
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June 7, 2021, 06:34 AM | #15 | |
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June 7, 2021, 07:51 AM | #16 |
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June 7, 2021, 08:13 AM | #17 | ||
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June 7, 2021, 01:18 PM | #18 |
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You can stop now !
Clean as per instructions on the jar ...and inspect the barrel ... only repeat if the barrel is still fouled . I had a Mil Surp 7 X 57 Model 93 Spanish Mauser with a barrel that looked like an old sewer pipe ...horrible codition ... but enough work with JB Bore compound got it back in deer hunting shape ... in fact my first 3 shot group could be covered by a quarter ...off hand , iron sights at 75 yards and it was getting dark ... ...JB Bore Compound made me a believer . Gary ( the patch with JB Compound will never "come clean" ) |
June 7, 2021, 06:57 PM | #19 | |
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Is is a mild abrasive intended to scrub out stubborn copper and carbon fouling. Abrasives don't chose what they work on. If you out it down a squeaky clean barrel it will turn black, indicating it polished, abraded the barrel surface. JB is applied on patches from breach to muzzle. If you are applying it to the entire bore, and is is an abrasive it will remove metal from breach to muzzle. No empirical data or measuring needed. How much, not much I suspect, but based on how it works and where it is applies it does. In regards to the OP. I think the gun will be fine. You stated about 200 patches of which abut 1/3 were JB bore past meaning approximately 66 patches. While not ideal this is only equal to about 6-7 normal cleaning sessions. I doubt you harmed anything but I would not recommend going that aggressively on a normal basis. Get a cheap bore scope. See what is actually going on in the barrel. get a good bore cleaner preferably one that works on copper and is bore safe (no ammonia) I am partial to bore tech eliminator as it works on carbon and copper. you can let it soak as long as you want and it will not hurt the barrel. The thing with it is it will react to brass jags and copper/bronze brushes so you may need to get a fancy jag and a nylon brush. With heavy copper fouling I have found I needed to go through the cleaning steps 2-3 times letting it sit about 30min to 1hr between sessions to get the bore back to brand new. I use the bore paste and bore bright as a finishing step after normal cleaning if I have any stubborn deposits that just down want to come off.
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June 7, 2021, 07:08 PM | #20 | |
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June 8, 2021, 12:28 AM | #21 | ||
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2. It is absolutely true that the barrel dimensions will be altered with each pass using JB Bore Paste. I doubt the means to measure barrel dimensions to the accuracy required to note the metal loss from a few passes even exists. Maybe with several hundred passes there are some specialized methods that would work. Quote:
You mentioned that you sometimes used 1 patch of JB Bore Paste with 5-10 passes during a cleaning if you noticed stubborn fouling. Let's say that a typical cleaning with JB Bore Paste is 2 patches with 10 strokes each for a total of 20 strokes. The OP has done the equivalent of 20-30 such cleanings.
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June 8, 2021, 02:30 AM | #22 |
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I wouldn't worry about it until the Op's shot it
(Probably no worse than a Tubb's final Finish/5-grit session -- which I've always found helpful in a rough or unlapped bore) |
June 8, 2021, 07:48 AM | #23 |
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Ya, unfortunately i did about 50 patches, 10 strokes each as it says on the jar, when they said use sparingly, i stupidly thought that meant don't put too much on the patch. And I also was thinking that the black on the patch was carbon from burnt powder, so I admit again, I screwed up and will never do that again.
Like someone said, it must have been a total of 500 to 600 total JB strokes. If I remember, I will post on here whenever I take that gun out of the safe and shoot it again, and report on the damage. Thanks everyone |
June 8, 2021, 10:30 AM | #24 | |
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June 8, 2021, 11:10 AM | #25 | |
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In most cases, the heavy chunky stuff, yes, is carbon, but there is not a lot of that in a bore of a rifle in the first place. When it is just uniformly black, that is iron oxide. Cleaning solvents neutralize and remove the oxidized layer. That does tend to smooth out the bore and was why, a long time ago, some barrels did improve with a break in procedure by effectively increasing slightly the bore diameter. When a bore gets properly fouled, the copper layer coats/fills in and "protects" the steel from erosion and oxidation in the majority of the bore, just not the first 1/2" or so where the copper does not get deposited, and instead quenched carbon does, but that does not protect the leade and lands. |
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