Author Topic: Bump inside barrel  (Read 1298 times)

Offline hortonstn

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Bump inside barrel
« on: August 11, 2019, 02:33:24 AM »
Acquired a 54  swamped barrel with a bump in the bore from a bumped up barrel tennion
It's in the center about 27 inches from breech .
I know answer is to discard it but has anyone removed this bump with lead laps ore any other method
Thought I would ask before making it a tomato stake.
Thanks

Offline smart dog

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Re: Bump inside barrel
« Reply #1 on: August 11, 2019, 02:47:58 AM »
Hi,
No, the answer is that it may be lapped down if not too severe. That is worth a try before discarding it.  I did exactly that on a barrel of a gun given me to fix. It is now the owners prize barrel for target shooting.

dave
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Online rich pierce

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Re: Bump inside barrel
« Reply #2 on: August 11, 2019, 05:33:27 AM »
I’m with Dave. Often what feels like a bump is pretty small. Maybe 0.001-2”. I would keep rotating the lap one groove each time. Otherwise the lap may just adjust in that one groove or land.
Andover, Vermont

Offline Goo

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Re: Bump inside barrel
« Reply #3 on: August 11, 2019, 05:35:52 AM »
How much "Bump" are we concerned about here? Lapping doesn't remove alot of material.
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Offline Bigmon

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Re: Bump inside barrel
« Reply #4 on: August 11, 2019, 04:11:38 PM »
LAst resort,  two short barrels?

Online Longknife

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Re: Bump inside barrel
« Reply #5 on: August 11, 2019, 05:05:47 PM »
 I would be more concerned about how thin the barrel wall is!!!~!
Ed Hamberg

Offline Bob Roller

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Re: Bump inside barrel
« Reply #6 on: August 11, 2019, 11:10:28 PM »
LAst resort,  two short barrels?

Bigmon beat me to the draw on this.

Bob Roller

Offline hortonstn

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Re: Bump inside barrel
« Reply #7 on: August 12, 2019, 12:02:11 AM »
for accuracy and safety sake i now have two short barrels if anyone has any ideas of what to make
with a 27" c weight 54 barrel let me know.......

Online rich pierce

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Re: Bump inside barrel
« Reply #8 on: August 12, 2019, 02:08:52 AM »
So, it’s a very short tapered barrel now. Take a look at Tommy G’s short Moravian rifle.
Andover, Vermont

Offline TommyG

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Re: Bump inside barrel
« Reply #9 on: August 12, 2019, 02:38:02 AM »
Thanks Rich.  I got a chance to shoot that guy last week.  Was curious about the 26" barrel accuracy.  No problems there.  The target on the left was the first 8 shots at 25 yds., on the right was my group at 50 yds. .  bear in mind I was just working up a load for the gun and it will be sighted by my son.  I wouldn't hesitate to build another with a 26, 27 or 28" barrel.  Here is the link to the short barrel Moravian gun I recently built.   http://americanlongrifles.org/forum/index.php?topic=55142.0



Offline Mike Brooks

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Re: Bump inside barrel
« Reply #10 on: August 12, 2019, 04:37:58 PM »
Maybe I should have spoke up before you got the hacksaw out.....You could have sent it to Hoyt and had a liner put in it.
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Say, any of you boys smithies? Or, if not smithies per se, were you otherwise trained in the metallurgic arts before straitened circumstances forced you into a life of aimless wanderin'?