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Q:
I have heard about hand lapped barrels,what is this process and why does it improve your accuracy?

Question by dbell. Uploaded on August 14, 2011

Answers (4)

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from lyndonavery wrote 2 years 35 weeks ago

In a nutshell, barrel lapping is a finishing process of the interior of the barrel. Whether it is done by hand or machine, the desired end result is the same. Perhaps an old time gunsmith who still revels in the art and craftmanship will take more time and care to achieve the utmost mirror shine and smoothness of the barrel. A mirror smooth and uniform barrel to exacting tolerances will increase accuracy due to lower friction losses, better spin applied to the bullet, less interior blemishes to increase barrel fouling. I hope this helps answer your question.

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from Jim in Mo wrote 2 years 35 weeks ago

lyndo, is correct. Hand lapping takes imperfections out of the barrel.

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from deerhunterrick wrote 2 years 35 weeks ago

Yes, both are right. But if you hand lap a barrel it should be done on a barrel that has not been chambered yet. Lapping can and will open the throat of the chamber. You may gain very little in the process,but you lose more. If you are building a gun from scratch then lapping becomes some what of a benefit. You lap the barrel, and then chamber it. Other wise your gains are very minimal

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from FirstBubba wrote 2 years 35 weeks ago

Very interesting. I suppose "hand" lapped would be done by "hand" rather than by a machine, which would be a "machine lapped" barrel.
Okay!
Kinda what I thought but wasn't real sure.

Bubba

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from lyndonavery wrote 2 years 35 weeks ago

In a nutshell, barrel lapping is a finishing process of the interior of the barrel. Whether it is done by hand or machine, the desired end result is the same. Perhaps an old time gunsmith who still revels in the art and craftmanship will take more time and care to achieve the utmost mirror shine and smoothness of the barrel. A mirror smooth and uniform barrel to exacting tolerances will increase accuracy due to lower friction losses, better spin applied to the bullet, less interior blemishes to increase barrel fouling. I hope this helps answer your question.

+6 Good Comment? | | Report
from deerhunterrick wrote 2 years 35 weeks ago

Yes, both are right. But if you hand lap a barrel it should be done on a barrel that has not been chambered yet. Lapping can and will open the throat of the chamber. You may gain very little in the process,but you lose more. If you are building a gun from scratch then lapping becomes some what of a benefit. You lap the barrel, and then chamber it. Other wise your gains are very minimal

+1 Good Comment? | | Report
from Jim in Mo wrote 2 years 35 weeks ago

lyndo, is correct. Hand lapping takes imperfections out of the barrel.

0 Good Comment? | | Report
from FirstBubba wrote 2 years 35 weeks ago

Very interesting. I suppose "hand" lapped would be done by "hand" rather than by a machine, which would be a "machine lapped" barrel.
Okay!
Kinda what I thought but wasn't real sure.

Bubba

0 Good Comment? | | Report

Post an Answer

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