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Author Topic: Fire lapping ML style  (Read 656 times)

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Offline Shorty

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Fire lapping ML style
« on: April 16, 2004, 04:50:50 PM »
Yeah, firelapping was a big thing for centerfires recently.  Well, I have this .50 CVA that some one put away dirty, and the bore looks like a sewer pipe, even after much scrubbing and hand lapping.  SO!  How about loading it up with patched balls, as normal, but instead of a lubed patch, lather the patches with lapping compound?  I have some 400 grit lapping compound and it sure can't this gun barrel! :roll: 'Gonna try it next time out.
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Offline Trapper-Jack

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Fire lapping ML style
« Reply #1 on: April 17, 2004, 02:33:14 AM »
Shorty,
I havent tried to fire lap a barrel, but what I've read about it, it seems that they used a conical bullet with the lapping compound in the lube that was in the grease grooves.  Another option, that I have done, would be to freshen the barrel, however it would be more labor intensive and require the disassembly of the barrel and some of those CVAs can be a bugger to get apart.
Thanks,
Trapper Jack
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Thanks,
Trapper Jack

Offline crow_feather

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Fire lapping ML style
« Reply #2 on: April 17, 2004, 04:23:01 AM »
Shorty

You might try one of them scotch pads on a jag of a smaller size than your regular jag.  I used this method once on a ugly bore and it worked pretty well.

If you was to try that lapping method you mentioned, remember that the friction will probably increase the pressure in your barrel.

You can also slug your bore and lap it.

Best of luck with it.
C F
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Offline lostid

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Fire lapping ML style
« Reply #3 on: April 17, 2004, 12:16:53 PM »
Why does everyone hafta "hurry up" things with lapping?

Why not just shoot a 100 ball through it, cleaning proper after each day, with the added benifit of learning how to shoot and how to clean.?

 I mean, come on!?? what's 100 ball and a pound a powder!?? (beginners)

 100 ball and a pound a powder is what my son at 9yrs old used up the first wknd he had his first BPML.

My point is ; Shoot and clean,,study and learn,,pratice makes the shooter,, not the gun.

from what I know, shooting bp guns with abrasives in the bore is a bad thing,,it may be all the rage with smokeless powder an modern steel bores,,but BP and iron bore,,,that's a whole nuther thing ain't it?
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Offline Stuffy25thIA

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Fire lapping ML style
« Reply #4 on: April 17, 2004, 12:43:36 PM »
If you want to firelap, try doing it with out any powder.  Just load using a tight patch, with the lapping compound, and a ball, then blow it out using air pressure.  This way you don't have to clean it between shots.
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Offline jgalar

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Fire lapping ML style
« Reply #5 on: April 18, 2004, 03:27:48 AM »
fire a few shots with toothpaste as your patchlube. Very fine grit and easy water cleanup.
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Offline crow_feather

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Fire lapping ML style
« Reply #6 on: April 18, 2004, 06:01:14 AM »
Also, your bore is protected from cavaties.  Plus it will be whiter after a week  :)  :)  :)  :)  :)  :D
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Offline jgalar

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Fire lapping ML style
« Reply #7 on: April 18, 2004, 07:22:21 AM »
ALSO A MINTY FRESH SMELL AND TASTE FOR THOSE WHO BLOW DOWN THE MUZZLE.
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Offline Longcruise

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Fire lapping ML style
« Reply #8 on: April 18, 2004, 03:41:42 PM »
I've firelapped four ml barrels and got excellent results with all four.

My first attempt was using LBT lap compound on the patch in place of the lube in a near new Lyman GPR barrel.  This barrel (and all of the gpr barrels I've seen new) was very sharp and sliced patches like a knife.

Using the compound on the patch method did clean it up pretty good but not as well at the bottom of the grooves as on the surface of the lands.  Next i used some .54 maxi balls rolled in the lap compound same as you would do for a modern gun.  Shot with about 25 grains of ff (it only took about 15 with the round balls) and swabbed the bore out good between shots.  After 20 shots it was even more improved!

Since then Ive done another Lyman GPR, a TC .50 and a TC .54 using the conicals and LBT compound.  All of these barrels were greatly improved by the process.  They load easier clean easier and shoot BETTER!!

Within the next few months I'll be lapping a .36 Green Mountain, a .50 Traditions Deerhunter and a Deer Creek .54 plains rifle.

Most guys when they think about firelapping a barrel are thinking smoothing and polishing.  There's more to it than that!  The process is also intended to straighten the barrel.  Now don't get confused about the term "straighten".  It doesn't mean to make the barrel straighter, but rather to make the diameter of the bore even (straight).  If you take one of your ml guns and put a very lightley oiled patch on a tight fitting jag and push it slowly down the bore you will probably feel tight and loose spots as you go along.  One benefit of firelapping is to remove those tight spots.
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