GTA
All Springer/NP/PCP Air Gun Discussion General => Air Gun Gate => Topic started by: Ronno6 on August 18, 2022, 07:53:53 PM
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A springer I recently acquired has a bit of barrel rise......
From the breech block to the muzzle it deflects upward about 1/8"
Does this need to be corrected??
I do not as yet have sights for this rifle, and the rear sight will be mounted to the breech block.
I would have to believe that,if once the sights are mounted, the target can be hit, all is OK.
But, what do I know????
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As long as it shoots right, the rest is up to you.
I bought a new pistol with the barrel pointing almost 10 degrees to the right. And the rear sight still had to be adjusted all the way to the right to get it on target. But that bothered me. I straightened the barrel, knowing the sights would no longer be usable until I made a new front sight cocked over to the left a bit. Which I eventually did.
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it would bother me even if it wasnt out of range of the sight adjustment .. id probably take it off and screw it down to the work bench with a 2x4 and lean on it alittle lol ..
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Generally if a barrel has rise instead of droop it indicates the barrel was somehow allowed to snap shut by spring power during cocking. If it shoots well and the sights can be adjusted to compensate there's no problem. If it still shoots too high after adjustment it's simple enough to build a barrel bending tool. Plans and instructions are in the GTA library: https://www.gatewaytoairguns.org/GTA/library/Charlies%20Barrel%20Tool.pdf (https://www.gatewaytoairguns.org/GTA/library/Charlies%20Barrel%20Tool.pdf)
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A springer I recently acquired has a bit of barrel rise......
From the breech block to the muzzle it deflects upward about 1/8"
Does this need to be corrected??
I do not as yet have sights for this rifle, and the rear sight will be mounted to the breech block.
I would have to believe that,if once the sights are mounted, the target can be hit, all is OK.
But, what do I know????
Most likely caused by either letting the muzzle slip when cocking a break barrel or perhaps "triggering off" a break barrel with a dangling un-latched cocked barrel "snapping up"..........
(https://i.imgur.com/6cx8MTf.jpg)
I've been bending all my springer barrels for the last several years so the poi at my 30 yard zero distance is within 1" or less of the point of aim with a mounted scope that's been optically centered to keep even tension on the erector springs. To do the bending I've been using a "bending tool" made of construction lumber, a heavy closed loop 5/8" thread eyebolt (so the loop will fit over my muzzle break), a flat washer, flanged nut and a "saddle" to spread the bending force over a longer area of the barrel and protect the barrel finish..........
(https://i.imgur.com/rsK0loX.jpg) (https://i.imgur.com/nppgPMC.jpg) (https://i.imgur.com/hCUutJR.jpg) (https://i.imgur.com/mfVQ9Q4.jpg)
The "tweaker" is positioned so it puts "bending force" on the barrel alone and not on the "barrel to barrel pivot block joint". The bending is done in small steps shooting pellets to test the amount of bend........
(https://i.imgur.com/M9YMCt1.jpg) (https://i.imgur.com/a3A9W5a.jpg)
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I will test when I get the sights......
If straightening is desired, I will shrive to locate the location of the bend.
I think the barrel is straight and the deflection occurs at the barrel/breech block joint, but not certain at this time.
I recently acquired a cheap Ruger Air Hawk Elite II with pretty severe upward deflection.
I straightened it in my hydraulic press and it turned out fine.
But, I'm hoping not to have to do it on this one...........
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Bend the barrel, easy stuff. Or use a droop mount turned around backwards with a scope.
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I have a springer that snapped shut when the anti beartrap failed. The barrel is not bent. The pivot hole in the breech block has slightly ovalized. This causes the barrel to angle slightly upward when closed. The iron sights work just fine though.
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I decided to go for it.
Snuck up on it with 4 or 5 attempts in the hydraulic press.
Got it close..........we'll see how it shoots with the sights........
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I received my open sights from Crosman, and mounted them up.
While sighting in, I got to a point where I could no longer see where the shots were hitting.
I walked up to the target and found that the little red dot in the center was fairly shredded.....
Is that good??