The Rough chamber thread got me thinking about barrels that are harder to clean than others.

I have some barrels on certain rifles that clean easy with hoppes and hardly any copper foul. Then I have a m70clasic that shoots pretty good but takes alot more scrubing and a couple applications of sweets to get copper out with some copper still stuck on the Lands.

I can actually see with a magnifying glass and bright light roughness of the lands where the copper sticks . I tryed JB bore paste quiet abit on that barrel with no luck. Ive always cleaned this barrel well after use sence I got it new.

I have thought about trying to lap the lands smooth. But dont want to screw it up.

Thought about flitz, or I brainstormed this bubba idea,,maybe a 400,600 or 800,or 1500 grit wet or dry paper rapped around a cotton cleaning swap with some oil and make a few careful passes down the bore, careful at the throat and crown.

Any ideas? or just live with it.

Just off the top of my head, I'd say NO to pushing an grit paper through a barrel!

Before you do something drastic, I'd clean it with "Wipe Out".

Secondly, just how bad is this rifle shooting?
Have the groups just gone to Hell, all of a sudden?
If it shoots good, just clean it as you usually do and quit worrying.

Just my opine.

How much do you value that barrel? If fouling is a serious problem and you really want to try saving the barrel, then I would recommend lapping the barrel the good old fashion way by pouring a lead lap and doing it by hand. That is about the only way to keep things uniform. If you're not really into that barrel you could fire lap it, but I generally hold off suggesting that until all other options have been played.

Its a nice M70 featherwieght classic. It always shoots good I can always get 3/4, 5 shot groups at 100yds . I just get these wild ideas when I am cleaning it. Its got a rough chamber shoulder also that leaves nice circular tool marks on my brass shoulder(only) also.
Its just a rough barrel compared to my other rifles.

Guess Ill not worry about it, it shoots good

GSP7, Ed Shilen told me on a barrel with inclusions, it is better to iron in the copper as you are cleaning. If you clean out the inclusions, it will grab more copper the next time. The problem with lapping a chambered barrel is the belling of the muzzle and the chamber. That will hurt accuracy more than copper.
Butch

Thanks Butch, sounds like good advice.

As a fix to that problem, I've been scrubbing bores with JB Bore Paste on a tight fitting patch. It has enough abrasive in it to polish the bore, and not enogh to hurt the barrel. I run the patch so the tip of the patch just exits the muzzle, and then come back to the chamber. That way I don't do anything to belly out the bore at the muzzle. I've done a dozen barrels so far with good results, both improved accuracy and easier cleaning.
I don't do this to barrels already lapped by the maker, but for factory, unlapped barrels.
About 100 stokes is all I do.

Don

I don't think that you can harm a barrel with JB paste.
Butch

Take a look at a product called "Tubb's Final Finish". I've used it on several barrels and it worked great ... and before someone brings it up, it did not move my throat a measurable distance nor did it improve accuracy (which was more than OK) but what it did do was make it much, much easier and quicker to clean.