Bore cleaning,... how to get this out?

[Lefty Trigger]

My buddy scoped my rifles last night and only one had some issues, my 6mmBR with almost 1100 rounds. Found what "looks like" craters filled with copper about 6 inches past the throat and lasts for only 4 inches or so then the rest of the bore looks great. He tried Butches bore shine and patches came out blue but its still there. I have and normally use Bore Tech CU remover and same thing blue patches but its still there. I have but not tried JB bore paste and thought about getting that foam cleaner and plugging one end and letting it soak.

 

[TAJ45]

Now if that isnt interesting.

With it being localized, with abrupt start and stop, maybe flaws in the blank from the rip?
Just spitballing.

 

[gman47564]

i have a 22 creedmoor barrel that looked like that... i tried about every cleaner there is and couldnt get it all out even with brushing... i even let it set full of bore tech carbon remover for 2 days and still couldnt get it out... a few friends suggested i use jb bore paste and my smith told me jb bore paste would get it out... so i got a tub of it and did like my smith said and after about a 100 strokes with a nylon brush covered with the paste and it was clean...

 

[1911nut]

i have a 22 creedmoor barrel that looked like that... i tried about every cleaner there is and couldnt get it all out even with brushing... i even let it set full of bore tech carbon remover for 2 days and still couldnt get it out... a few friends suggested i use jb bore paste and my smith told me jb bore paste would get it out... so i got a tub of it and did like my smith said and after about a 100 strokes with a nylon brush covered with the paste and it was clean...

How many shots before the craters are filled with copper again?

 

[gman47564]

How many shots before the craters are filled with copper again?

in mine must of that cratering was carbon build up... once i got rid of that them craters were gone... it still has some firecracking in the first 2 or 3 inches of the bore but the gun shot alot better and cleaned up alot easier afterwards...

 

[Walt Krafft]

If it still shoots ok, don't worry about it. If you do get it out it will come back as soon as you shoot it.

 

[Chuckhunter]

Short stroke it with Iosso Bore Paste or JB, your choice. Flush it out good with your preferred solvent, dry well, rescope and if necessary do it again. It will come out and smooth out some of that light fire cracking. Just had a similar problem only with carbon. Iosso took it right out.

 

[Lefty Trigger]

Just got back from having him check it after three 10 minuet sessions with JB bore paste and more Bore Tech CU remover. I'm not getting blue patches anymore but now that its clean it looks horrible, serious cratering and he even found "inclusions" in the chamber on one side. He said it could just be a bad blank to start with and just shoot it. He also said the copper will come back with the lands that rough.

 

[Thud]

That was never a bad blank. The 6br is good for approx 800-1200 rounds on average depends how hot you shot it. Your barrel fell into that range.
You can shoot it but the coppering will came back fast. And drive you crazy
My advice to save you from mass frustration I just rebarrel and continue down the road.

 

[JSH]

How did it shoot?

Shooting being a lot of mind game as well, you have lost all faith in it now and a replacement will fix it.

 

[bozo699]

My buddy scoped my rifles last night and only one had some issues, my 6mmBR with almost 1100 rounds. Found what "looks like" craters filled with copper about 6 inches past the throat and lasts for only 4 inches or so then the rest of the bore looks great. He tried Butches bore shine and patches came out blue but its still there. I have and normally use Bore Tech CU remover and same thing blue patches but its still there. I have but not tried JB bore paste and thought about getting that foam cleaner and plugging one end and letting it soak.

View attachment 1184882

Lefty,
I have a factory Savage barrel that looks terrible and fouls bad but for a factory tube it shoots great so I’m just gonna shoot it!... but if I was competing with it it would be replaced right now!...
Wayne

 

[Lefty Trigger]

How did it shoot?

Shooting being a lot of mind game as well, you have lost all faith in it now and a replacement will fix it.

Still under 1.250 at 300 yards if I can keep my end up. In all fairness it was never a awesome barrel anyway, it was a Midway/Shilen barrel and I just checked and it has exactly 1224 rounds but my loads are never hot. Currently my 300yd competition load is 26.0gr of Reloder 15 pushing a 107gr SMK at 2466fps.

 

[Dusty Stevens]

Just firecracking- ignore it as long as it still shoots good, then replace it. This is also an example of how you can just keep getting faint blue for a long time thinking its clean. That copper hangs out in firecracks and inclusions and takes forever to dissolve

 

[divingin]

My short range 6BR barrel (over 4K rounds on it now) looks considerably worse than that one, but still shoots pretty well (had it out for the first time in months, and averaged a little over 2 tenths, with one 5 rd group at about .102" at 100yds.) This barrel gets the same web of copper in the firecracking. I normally use Boretech C4 and CU2+ to clean, but when the copper starts bothering me, I've been using KG-12 (at home; haven't gotten around to filling a small bottle for range use.) If that fails then I go at the near end of the bore with Iosso on a couple of VFG felt pellets.

 

[JFrank]

Lefty,
I have a factory Savage barrel that looks terrible and fouls bad but for a factory tube it shoots great so I’m just gonna shoot it!... but if I was competing with it it would be replaced right now!...
Wayne

Stop talkin crazy’ man you know savage can’t compete !!

 

[bozo699]

Stop talkin crazy’ man you know savage can’t compete !!

I would go that far my friend!... I’ve had my ass handed to me more than once with a guy sitting beside me with a Savage lol
Wayne

 

[Lefty Trigger]

I'm starting to think that barrel quality is a major factor in this. Here is a couple of pics he took of my 6.5x47 Lapua barrel made by Criterion with 964 rounds on it. You can just start to see the "fire cracking" with just barely traces of copper in it. This barrel has not been cleaned yet either since last shot.

 

[XTR]

http://forum.accurateshooter.com/threads/teslong-scope-pictures.3994505/

I’ve got a 308 that looks worse

 

[Nick Caprinolo]

While that four inches looks bad, I doubt if it has much effect on accuracy. After removing all of the fouling, The first time you fire it, the craters will begin to fill with copper again. I may be completely out of wack here, but my theory and that's all it is, suggests the barrel lands are smoothed out and have little affect on the bullet itself. Since this is most likely at or near the breach, you have most of the barrel left to adjust the actual shape, of the bullet, as it leaves the barrel.

Let the target tell you. If this condition causes trouble, the target will let you know. I have barrels many times worse than this one and they shoot really well. I also have a few that are pristine, that simply won't shoot well. There must be some reason, why many guns will not shoot good after cleaning, but will give good results, after left dirty.

You can lap that barrel until it is perfectly smooth but in doing so, you have removed a lot of material from the entire barrel, enlarging the inside diameter from end to end. Not a good idea, in my opinion.

This is my opinion and of course, I may be wrong. It won't be the first time.

 

[Uthink Uknow]

If that barrel condition is such that the rifle doesn’t shoot as well as you think it can and you are losing sleep over it, dump it and get a new one. Now, let me go back to sleep.