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Author Topic: Barrel Bending 101  (Read 22474 times))

Offline mcoulter

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Mr. Butterfingers...
« Reply #40 on: January 05, 2016, 02:14:33 PM »
Well I joined this club back in December... actually Christmas morning to be exact!  I had a new scope, 4 or 5 tins of new pellets to test out in my Hatsan 135 (.22) and the rest of the day to play...  Cocking the gun ON THE FIRST SHOT the barrel slipped out of my hands and whammo! A beautifully bent barrel.   :'(  It's probably zero'd at 150 yards now...

I did throw together a jig on my workbench but could not force the barrel far enough past center to get it straight.  (I was using the back side of my bench vice that extends out when you close the vice for pressure.)  I probably went 3/8th of an inch past center and it really did not affect the barrel much.  I'll try the c-clamp technique shown here and see how it goes...   

Can anyone advise on how far past center I may need to go?
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Offline ezman604

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Re: Barrel Bending 101
« Reply #41 on: January 05, 2016, 02:21:09 PM »
A little at a time. :)
Try 1/2". Test fire and see. Then try a bit more if needed. Or flip the battle over and go the other way if needed.
Just try small steps to SEE and get a feel for what it will take.
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Offline mcoulter

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Re: Barrel Bending 101
« Reply #42 on: January 05, 2016, 09:47:54 PM »
Roger that.  Thank you Sir!
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Offline nced

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Re: Barrel Bending 101
« Reply #43 on: January 05, 2016, 10:10:35 PM »
i would like to see the actual bending in  bbl bending 101. How did you bend it? or did i miss that part...  yup, i see that i did in fact miss that part.
I've been bending HW barrels for years to get the poi within 1/2" of the aim point at 30 yards with my optically zero'd scope. Here is the rig I use made from a couple pieces of 2x4 construction lumber and a modified 1/2" eye bolt with flat washers and nut...........
Uploaded at Snapagogo.com
Uploaded at Snapagogo.com
Uploaded at Snapagogo.com

Adding snoop and windage is easy with a break barrel and for this I use my "barrel tweaking tree" on the back yard practice lane..........
Uploaded at Snapagogo.com
Uploaded at Snapagogo.com

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Offline mcoulter

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Re: Barrel Bending 101
« Reply #44 on: January 06, 2016, 12:42:42 PM »
Outstanding, thanks for sharing that Ed!

Update:  Here's my jig:



I have not yet had a chance to put it back together again...
« Last Edit: January 14, 2016, 10:44:02 AM by mcoulter »
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Offline mcoulter

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Re: Barrel Bending 101
« Reply #45 on: February 29, 2016, 01:23:39 PM »
I posted a brief update here regarding how my Hatsan 135 is shooting after bending my barrel back:

http://www.gatewaytoairguns.org/GTA/index.php?topic=104942.msg998834#msg998834
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Offline lefteyeshot

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Re: Barrel Bending 101
« Reply #46 on: February 29, 2016, 07:00:28 PM »
This morning the one piece mount came with one of my Hammers scopes fit the wide scope groves on my Slavia 631. Mounted the Hammers, leveled it, then centered it and it hit about 2 feet low at 25 yards. Adjusted till the elevation knob hit the top and it still hit real low. Re-centered the cross hairs and went to the tree fork by the fence. Took three trips to the tree fork then the gun was hitting 2" high and about 4" left. Zeroed from there. It's a nail driver now.
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Offline MicErs

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Re: Barrel Bending 101
« Reply #47 on: February 29, 2016, 07:09:29 PM »
It's just too difficult for me to focus on the front sight, rear sight and the target. But the TruGlo sites on this airgun sure made a believer out of me.


You are not actually supposed to focus on the front sight, rear sight and target at the same time.  Focus on the front site. Everything else will take care of itself.




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Offline Sfttailrdr46

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Re: Barrel Bending 101
« Reply #48 on: March 01, 2016, 03:27:07 PM »
It's just too difficult for me to focus on the front sight, rear sight and the target. But the TruGlo sites on this airgun sure made a believer out of me.


You are not actually supposed to focus on the front sight, rear sight and target at the same time.  Focus on the front site. Everything else will take care of itself.


;) ;) So that's what I've been doing wrong all these years ;D ;D
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Offline sawtoothscream

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Re: Barrel Bending 101
« Reply #49 on: July 23, 2017, 03:18:24 AM »
Have to try this on my b 26.    It shoots really high, had to adjust way to much to hit where I want and the poi shifts alot.       
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Offline mst3kpimp

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Re: Barrel Bending 101
« Reply #50 on: August 09, 2017, 09:27:44 PM »
my new b26-2 .22 shoots too low so I bent it up but went too far so now I must go the other way.   A way to see your progress is to look down the barrel, in my case the exit hole is mostly obscured due to my bend.
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Offline Hoosier.22

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Re: Barrel Bending 101
« Reply #51 on: January 06, 2018, 02:34:50 PM »
Amazingly enough I was able to bend the barrel on my droopy Titan GP using this very same method. Trial and error got my poi close enough that my scopes vertical adjustment was in the upper range where it was able to remain consistently in target. Before this I had actually installed the scope upside down so that the correction for the barrel droop was tightening the erector tube spring, it worked ok albeit unconventional. Bending the barrel was definitely a better fix.
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Offline superchikn

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Re: Barrel Bending 101
« Reply #52 on: January 21, 2018, 04:26:30 PM »
Wow,  great information.  Working on restoring a Diana 23.  The barrel looked like a corkscrew and working with my bench vise and three points I have been able to true it up except for one last bend at the barrel block and was not sure how to tackle that in a vise.  C clamp and jig will work perfectly. 
FWIW - three points in a bench vise works great for very localized bends.
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Offline lefteyeshot

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Re: Barrel Bending 101
« Reply #53 on: January 21, 2018, 05:15:58 PM »
Wow,  great information.  Working on restoring a Diana 23.  The barrel looked like a corkscrew and working with my bench vise and three points I have been able to true it up except for one last bend at the barrel block and was not sure how to tackle that in a vise.  C clamp and jig will work perfectly. 
FWIW - three points in a bench vise works great for very localized bends.

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