quote:

Originally posted by DUKE NUKEM:

quote:

Originally posted by butchlambert:
Lothar Walther would be OK if they ran Woody Woodall off.

We thought he was a pretty nice fella.

Congratulations, you are a lucky man!

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Originally posted by butchlambert:

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Originally posted by SR4759:
Lapping makes the bore more uniform from end to end and it makes all the surface texture finish lines run parallel to the bore axis.

Lapping has nothing to do with accuracy.

Really? Then why are they lapped?
Be specific rather that just deny.

I once worked with one of Wiseman's former employees and he said they lapped the barrels to make the bore more uniform end to end.
He said the target was to have the bore about .0001 to .0002 larger than the bullet diameter.

Yes Wiseman used what sounded like electroless copper to lubricate the buttons.

He also said that he would not lap a barrel that had been installed on a rifle.

Ernie Stallman lapped the barrels he sold for use on the Browning BPCR rifles. They certainly produce superior results with cast bullets.

You only need to shoot and clean a few unlapped barrels to understand that a lapped barrel will provide superior accuracy.

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Originally posted by butchlambert:

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Originally posted by Idaho Sharpshooter:
butch,

if that be true, why then, do nearly all of the BR shooters lap their barrels in a fairly standard routine?

You know, that fire one and clean for the first twenty rounds, then three to five for the rest of the fifty rounds they are fire forming then trimming prior to matches... I had a number of shooters tell me the same thing one year at the Super Shoot.

Jim Feren and Dean Miller told me the same thing at several Coors Schuetzenfest Nationals I competed in in both Golden and Raton.

I guess "most" shooters have not done the shoot one and clean in several years. The barrel has its top potential from the first shot. Why wear it out shooting and cleaning after ea. shot and so on? When I started cleaning the fuzz in the throat from chambering my barrels quit coppering and fouling. I have never seen a BR competitor lap his barrel, clean and JB, yeah. Bill Hull ran the Shilen barrel shop for about 20yrs. He said the primary reason they were lapped in the shop was to remove the copper based lube used in rifling.

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I once worked with one of Wiseman's former employees and he said they lapped the barrels to make the bore more uniform end to end.
He said the target was to have the bore about .0001 to .0002 larger than the bullet diameter.

I think you misunderstood what he said. A .308 barrel has an approx. .300 bore. A 243 or 6mm has a nominal .237 bore. Some of the better barrel makers lap after drilling and reaming and before rifling. I think the verdict is still out on this.

hmmmm...

I sat in a lawn chair in front of Ed's motorhome and listened while he told me his barrels did not need to be shot and cleaned at the SS one year. Tony and Faye were sitting there, and Tony liked to of killed Ed when he said that had been his procedure since he got into BR.

One month ago Allie Euber told me he uses JB Bore cleaner for 200 strokes, on every new barrel he gets, before he ever has them chambered. He swears by this routine.

I still have a couple of Roger Johnston's NECO barrel lapping kits. You roll progressively finer grit oxides on to cast bullets and fire them with about a 70% load.

There is more than one way to skin a cat...

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Originally posted by butchlambert:

quote:

I once worked with one of Wiseman's former employees and he said they lapped the barrels to make the bore more uniform end to end.
He said the target was to have the bore about .0001 to .0002 larger than the bullet diameter.

I think you misunderstood what he said. A .308 barrel has an approx. .300 bore. A 243 or 6mm has a nominal .237 bore. Some of the better barrel makers lap after drilling and reaming and before rifling. I think the verdict is still out on this.

Yes I should have said groove diameter to make it clear to you since you do not want to distinguish what I said from LAND diameter.

The verdict was in about 140 years ago. Lapping a barrel makes the finish lines run end to end and it makes the diameters more uniform end to end.
Copper plating is used to lubricate the button means what to a cut rifled barrel? Nothing

Copper plating meant nothing to any barrel manufactured prior to button rifling.
But please explain all the tool marks in millions of button rifled Remington M700 barrels and then explain the lack of tool marks in Remington 40X-BR barrels....

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Originally posted by SR4759:

quote:

Originally posted by butchlambert:

quote:

I once worked with one of Wiseman's former employees and he said they lapped the barrels to make the bore more uniform end to end.
He said the target was to have the bore about .0001 to .0002 larger than the bullet diameter.

I think you misunderstood what he said. A .308 barrel has an approx. .300 bore. A 243 or 6mm has a nominal .237 bore. Some of the better barrel makers lap after drilling and reaming and before rifling. I think the verdict is still out on this.

Yes I should have said groove diameter to make it clear to you since you do not want to distinguish what I said from LAND diameter.

The verdict was in about 140 years ago. Lapping a barrel makes the finish lines run end to end and it makes the diameters more uniform end to end.
Copper plating is used to lubricate the button means what to a cut rifled barrel? Nothing

Copper plating meant nothing to any barrel manufactured prior to button rifling.
But please explain all the tool marks in millions of button rifled Remington M700 barrels and then explain the lack of tool marks in Remington 40X-BR barrels....

Anytime some one questions you, you start whining.