AmericanLongRifles Forums

General discussion => Gun Building => Topic started by: hortonstn on August 11, 2019, 02:33:24 AM

Title: Bump inside barrel
Post by: hortonstn 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

Title: Re: Bump inside barrel
Post by: smart dog 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

Title: Re: Bump inside barrel
Post by: rich pierce 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.

Title: Re: Bump inside barrel
Post by: Goo on August 11, 2019, 05:35:52 AM

How much "Bump" are we concerned about here? Lapping doesn't remove alot of material.

Title: Re: Bump inside barrel
Post by: Bigmon on August 11, 2019, 04:11:38 PM

LAst resort,  two short barrels?

Title: Re: Bump inside barrel
Post by: Longknife on August 11, 2019, 05:05:47 PM

 I would be more concerned about how thin the barrel wall is!!!~!

Title: Re: Bump inside barrel
Post by: Bob Roller on August 11, 2019, 11:10:28 PM

Quote from: Bigmon on August 11, 2019, 04:11:38 PM

LAst resort,  two short barrels?

Bigmon beat me to the draw on this.

Bob Roller

Title: Re: Bump inside barrel
Post by: hortonstn 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.......

Title: Re: Bump inside barrel
Post by: rich pierce 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.

Title: Re: Bump inside barrel
Post by: TommyG 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 (http://americanlongrifles.org/forum/index.php?topic=55142.0)

(https://i.ibb.co/8YCMpDS/P1000988.jpg) (https://ibb.co/2Z9qQ7f)

Title: Re: Bump inside barrel
Post by: Mike Brooks 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.