To quote someone who really knows accuracy:
From:
bartb@hpfcla.fc.hp.com (Bart Bobbitt)
Newsgroups: rec.guns
Subject: Cleaning .22 LR Rimfire Barrels
Date: 7 Mar 1994 18:32:52 -0500
There's a really neat thing on the market for removing lead from barrels. Sold by Kleen Bore, they're 1-in. square cotton patches impregnated with come chemicals. Sold in boxes of 25 for about $2.40, I got a box and tried them.
My smallbore match rifle had been cleaned quite well with Hoppe's No. 9 solvent, then the bore wiped dry with patches. Leaving a film of No. 9 in the barrel for an hour did not dissolve any more lead that could be picked up by a cleaning patch. So, it appeared squeaky clean.
I usually run a benchrest bronze brush through the barrel from breach to muzzle direction only a couple of times about every 500 rounds. I had done this in the cleaning process used.
Then I takes one of these Kleen Bore lead removing patches, puts it on my nylon jag, and slowly pushes it through the bore. To my surprise, it came out black! I reversed the lead removing patch on the jag, then pushed it through again. This time, it came out gray in color. It must have removed something that the standard procedures did not get. I then put another one through but it didn't show any discoloration indicating the bore was more
or like the fuels most cars use these days; unleaded.
To verify the blackening was not due to chemical reaction with the blued bore, I took another lead removing patch and rubbed in on the barrel's outside; no color change. Seems to prove that the one that went through the bore did remove the last microinches of fouling.
I would guess these Kleen Bore lead removal patches would work in
any barrel to remove all the lead.
BB
#####
Eley has a different routine from Bart's:
http://www.accurateshooter.com/technical-articles/how-to-clean-rimfire-rifle-barrels/
Hope this is helpful.
Jimro