Leshiy Barrel OD and Lockdown

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lbc_PSI

Member
Apr 17, 2018
1,125
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CA, United States
A while back I ordered a "made in Ukraine barrel" for my Leshiy from AirgunHeaven. I had wanted a .22, but they were "out of stock", so I went with a .177 instead. Pretty good price at €98 (~$116USD)

Life happens and I didn't get around to trying it out until today.

The “Standard Classic Leshiy” is made by LW? and the .25 barrel I have mics at 0.468" OD. The .177 Ukraine barrel mics 0.466". Take the measurements with a grain of salt, as he micrometer I have is around 35 years old and isn't digital..so reading it is probably only as accurate as my old eyes. ;-)

It could also be the 350mm .25 barrel I have is not a true Edgun LW barrel..it was purchased used as part of a package, so its origin is unknown. True Edgun LW barrel are listed at 12mm == 0.472..though the Edgun Shop lists them as 0.47..so IDK.

Maybe someone with a digital micrometer and good eyes could "mic" a known Edgun LW barrel?

The 0.002 makes a difference in feel when inserting/swapping barrels. The .25 LW is snug and the Ukraine .177 is definitely looser. Snugging the barrel nuts takes more turns than the recommended “bottom plus a quarter turn” when installing the Ukraine .177 barrel.

I only shot at ~10 feet in the garage with a wobbly hold but all 4 pellets were touching..kind of a micro clover leaf. Can’t shoot further here in CA for the next few days because of a “winter” storm. LOL..Yeah, it never rains in California..

The POI of the 4 .177 shots was left of the .25 scope sight in. This sort of makes sense as the barrel is pointing 0.002" to the left of center based on the OD diff of both barrels. This assumes the lock down process captures the barrel by pushing it against something..

Not sure if the “Ukraine slop” will cause issues other than POI. I don't know enough of how the Leshiy barrel is secured. Obviously, a certain length of the Leshiy breech contains or holds the breech end of the barrel, but I don't know anything about the barrel mid-point lock down clamping mechanism. If there is slop at the breech end, my mind tells me that the lock-down process might push on the Leshiy breech in a way not intended by the designer...

Maybe someone that knows how the lock down process works..or maybe Ed..will chime in. Am I over thinking it? Wouldn't be the first time. LOL
 
Would have been better if the 2 barrel tensioning screws were situated on the top or the bottom of the barrel rather than on one side in your csae then it would only result in vertical deviation rather than horizontal as you will notice when shooting far distances when zeroed at close distance where you will need to adjust both elevation and windag for the longer shots or hold over with Kentucky Windage. Not an issue if only shooting constant zeroed or very close distance though.

Only way I can think of to truly remedy this is to have a machinist turn the barrel down and run a proper sized permanently affixed rigid barrel sleeve running the entire length of the barrel.
 
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Thx. I get how the barrel swap works. ;-)

The questions are..

#1) How important is barrel OD? How much slop is OK? 0.0005 or 0.001? The Ukraine barrel I have will literally slide through..there is no effort required to push the barrel into place as in the video. If I insert a Leshiy LW barrel, it is a snug fit..it takes a firm press to push in place..and won't slide out when tipped forward. If I were to position the Ukraine barrel in the breech, then tip the gun forward, the barrel would slide right out. There is no tension involved when inserting the Ukraine barrel like there is with the LW.

#2) How does the Internal lock down work..not the exposed screw tightening..I get that..but rather the internal mechanism. Is it just a block pushing on the barrel? Or is it a sled like in the R5 air tube snug down that has a centering effect?


 
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I'd just return that undersized barrel as defective and just buy a genuine one for proper fit.

Would be a MAJOR BUMMER one day while youre out hunting in the woods and you go to load a pellet into your barrel that was lost anywhere within several hundred yards hidden within overgrown brush never to be found again (at least BY YOU). Bigger loss than your return shipping out of pocket expense. Matter of fact request refund for return shipping too and state the truth that the barrel just falls out that simply ain't right.

You could just decide to keep it and permanently EPOXY IT into the gun too...

No worries about ever losing that undersized barrel falling out that way...
 
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Maybe someone with a digital micrometer and good eyes could "mic" a known Edgun LW barrel?
Click to expand...

Both my original LW barrels measure 2 hundreds of a millimeter under 12 mm - 11,98 mm / 0,4716521 inch



Leshiy barrel od.1604828081.JPG



How the barrels is arrested, I don't know - maybe you can see it if you take out the barrel and look down the channel but I think you would have to take dismount the hammer spring housing to really see how its done

But my guess is that the barrel is pinched in the frame with two floating screws, so pinched from both sides but that's only a guess

Perimeter of the LW barrel at 11.98 is 37.6363

Perimeter of Ukraine barrel at 11.8364 is 37.1652

So the added pinch necessary to hold the Ukraine barrel will be 0.5411 mm

The barrel will sit lose in the bushing at the back but may not be a problem
 
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Would be a MAJOR BUMMER one day while youre out hunting in the woods and you go to load a pellet into your barrel that was lost anywhere within several hundred yards hidden within overgrown brush never to be found again (at least BY YOU).
Click to expand...

Surely you must be joking, the barrel would be a 175 g / 2700 grain slug (the weight of a .250 mm .177 cal barrel) and after moving a few cm the air would just vent down the frame

https://youtu.be/cohHmLcjG_s?t=73
 
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Both my original LW barrels measure 2 hundreds of a millimeter under 12 mm - 11,98 mm / 0,4716521 inch
Click to expand...



Thanks. I re-zeroed my micrometer and my LW barrel mics at 0.4705 as close as I can tell

How the barrels is arrested, I don't know - maybe you can see it if you take out the barrel and look down the channel but I think you would have to take dismount the hammer spring housing to really see how its done
Click to expand...

I have a endoscope that will fit the barrel cavity. I'm going to pull the UK barrel and take a look. If I get a good picture, I'll post it.



Perimeter of the LW barrel at 11.98 is 37.6363

Perimeter of Ukraine barrel at 11.8364 is 37.1652

So the added pinch necessary to hold the Ukraine barrel will be 0.5411 mm

The barrel will sit lose in the bushing at the back but may not be a problem
Click to expand...

I didn't measure the extra lockdown required, but it was lot more than the recommended amount. My main concern was the torque being applied at the lockdown location and the breech end not being a "perfect" fit. I'm thinking that the extra torque on the barrel, aside from there being a centering issue, might also cause a harmonic change. IDK. So far, the lighter pellets ~8gr have a shotgun pattern while the 13.6gr are a .22 sized hole at 8yards. Impact with the UK .177 barrel was a full 30-50 clicks at 8yds relative to the .25 LW barrel.


 
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