I heard a guy saying after hand lapping his barrel it shot great. I am not sure what it means exactly or if match grade barrels would benifit any opinions out there?
When I get a new rifle or barrel, I give it 500 strokes with a JB paste saturated patch wound around a used bore brush. With a bore guide, of course. Whether it just makes me feel better or if it really helps, I'm not sure but, as posted, it certainly seems to help the barrel clean up. According to the folks at Douglas, if you know how to make a barrel, it doesn't need lapping.
Similar to wasbeeman I use a slurry of Bon-Ami(calcium carbonate) and a cleaner like 401.I can not say that it improves repeatability but future cleaning of Shaw, Stevens and Savage barrels is made easier. I feel it does a number on mini , micro burrs and rough edges. roger
Old age is a high price to pay for maturity!!! Some never pay and some pay and never reap the reward. Wisdom comes with age! Sometimes age comes alone..
Posts: 10226 | Location: Temple City CA | Registered: 29 April 2003
I've only done one barrel although I did it by firelapping. The rifle is a Winchester M70 Featherweight in 7x57 that copper fouled so badly that accuracy was literally down the crapper in about 10 shots. I didn't quite follow the instructions though. Rather than use jacketed bullets, I used cast lead bullets with a long bore riding nose. Instead of firing 10 shots per the instruction, I only use five shots with their provided grits. Final round of shots was 10 rounds coated with the JB Bore Paste. After a good cleaning with solvent and drying the bore, I sgot 5 rounds of factory ammo to foul the bore and then shot a 5 shot group with one of my handloads. The group was .75" A couple more shot groups and accuracy was still very good with very litle fouling showing. Now, a barrel cleaning job that used to take literally all day now is done in less than 20 minutes, usually much less. Paul B.
Posts: 2814 | Location: Tucson AZ USA | Registered: 11 May 2001
Firelapping has worked well in several barrels for me, but I have never done it with reduced loads. I have also never used the coarsest grit which comes in the fire-lapping kits. A couple of times I have only used the two finest grits in the kits, though I usually use the three finest grits.
I have never used fire-lapping to improve the cleaning characteristics of any barrel. I only use it in barrels which have failed to shoot well, hoping to improve their accuracy. And it has done that.
If I had a barrel which was shooting well, but was hard to clean, I'd just go the JB bore-paste route, which I don't really consider lapping. I only consider it lapping where the grit is harder than the alloy it is working on. That isn't the situation with JB which is reputed to use the same polishing medium used in toothpaste.
Posts: 9685 | Location: Cave Creek 85331, USA | Registered: 17 August 2001