Air Gun Home :: View topic - Winchester Re-Crowning

Alstone · Moderator & Site Supporter

When I first got my Walther Winchester 94 it seemed to be shooting all right and the odd flyer I thought was me as I’m used to pistols these days and haven’t had anything to do with rifles for quite a few years. Anyway not being used to iron sights and not wanting to put a scope on it as I would not be in keeping, I persevered, but things did not get any better so I decided to investigate further, the first place to look was the crowning of the barrel and this was in a poor state, considering it has a Walther barrel, this I removed to get ready for machining in the lathe, but before I did that I put it on a surface plate to check for straightness, and it was found out to be .024” out in the middle ( for any on who is not familiar with a Walther Winchester it has a 10mm tube for a barrel which fits in a 20mm shroud ) this I straightened then re-machined the crown re-assembled the gun and hey-presto it shoots OK, and I’m not such a crap shot as I thought.

AL

Poor state of the crown

The Barrel was .024" out

AirGunEric · Site Admin

Sounds like Crosman- bent barrel and a poor crown! Apparently QC isn't so hot at Winchester either.

Hmm, some Winchester airguns are made by Daisy, and apparently some by Walther- is there anyone else Winchester has making guns under their name? I might've expected QC issues from Daisy- but I would have thought Walther dropping the ball to be a lot less likely. Apparently not!

I'm glad you sorted it out. It's always good to find out it's not your shooting skill that is the problem!

Alstone · Moderator & Site Supporter

Actually I should have stated that this Winchester is made by Umarex as the Walther Lever-Action but it does have a Walther barrel. It's the same with everything these days the customer is the quality control.

AL

broommaster2000 · Moderator

Strange. My umarex is in near perfect condition, allthough I did spot a little spot of rust onder the stock when I took it apart. I made sure it got really greasy. Mr. Green

Alstone · Moderator & Site Supporter

Hi Broommaster the rest of the gun is excellent just the barrel letting it down, I think it was a Monday morning or Friday afternoon job.
Plus with the gun being a replica I think the engineering tolerances are not as strict as on a proper air rifle such as your Airmagnum, but things are OK now so I'm happy.

AL

StevieLaner7777 · Moderator

Hi Al

Bent barrels can cause significant wear on the one side of the barrel.

Nice to know that's been sorted out now!!

Also: Nice gauge Al,
And the adjustable stand, I've always wondered how the magnet can be switched off just by a switch!?!

Stevie Thumb Up!

AirGunEric · Site Admin

Alstone · Moderator & Site Supporter

Hi Stevie it's an old dial gauge but still better than most that you get today. The magnetic base has a north pole at one side and south pole at the other and acts like a horse shoe magnet, the inside of the base is made up of many bar magnets in a line all the north poles at one side and all the south poles at the other, when you press the button to switch it off half of the magnets flip over so the line up is NSNSNS etc and they cancel each other out and release the base. Simple when you think about it.

AL

StevieLaner7777 · Moderator

Hey Al

Ah!! So that explains it!!
I had a feeling it might be something to do with the magnets "Canceling each other out", But I wasn't too sure as I've never cut one in half or actually remembered to research it.

Thanks for letting me know Al, That's great info!!

Stevie Thumb Up!

AirGunEric · Site Admin

Here's the 'bent barrel' gun:

http://www.airgunhome.com/agforum/viewtopic.php?p=1645

I believe there was a second gun with a more "pretzelized" barrel out there somewhere that was constructed more in humor than for scientific purposes- but I can't find it at the moment.

Alstone · Moderator & Site Supporter

The barrel had a curve over it's full length and it was shooting to the left when I got the gun, then I tightened up the barrel and it shot to the right, which should have told me something, and being in a shroud did not help,
but thats all sorted now.

As for the photo of the gun with the twisty barrel I seem to remember that the germans in the second world war had a gun that shot round corners with a barrel bent at 90deg and a mirror half way down the barrel. Like you say Eric if the last bit of the barrel is stright things should be OK.

AL

AirGunEric · Site Admin

I agree- those fully shrouded barrels make it impossible to see the actual path/curvature on the barrel unless you disassembly the whole gun. Quite a number of Crosman's (and I'm sure many others) are built like this.