A bit perplexed

nomad 68

nomad 68

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Hi all.I left my older Marlin 336 with a gunsmith to install the wwg happy trigger and swap the rear barrel band with one with the swivel. Could have swapped the band myself but figured since he had it there....Anyway,this was always a very accurate rifle and when I got it back,it didn't shoot so good.I got to googling about it and hit on some threads about barrel band tension affecting accuracy so I got out the screw driver. Had a bit of a chore removing the rear screw but the band was really tight. I couldn't understand how he got it on without leaving a lot of marks(there were some). I decided to take the rear band off to rremove little material out of the inside. When I removed the sight and front band I discovered he had cut a slot about a third way thru the mag tube behind the front band.Any idea why he would do this? Some kind of accuracy mod?After I refitted and re blued the inside of rear band and put it back together it shot fine again.
 
Why wouldn't you ask him? Maybe it was there before he worked on it?

I seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected...
 
guntech said:
Why wouldn't you ask him? Maybe it was there before he worked on it?

I seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected...
Click to expand...

I can say for certain it was not slotted because I had it apart several times over the years . I can't explain it but relieving the rear band seemed to do do the trick. As far as asking him,I got it back December of 13 but never fired it til recently( too many guns I guess)and I honestly don't know if he would remember it. He has to be almost 80 lol. Just wondered if this was common practice to relieve pressure.i didn't say and also don't think a barrel band would compress a barrel but wondered if upward pressure from the mag tube being squeezed toward the barrel would effect accuracy.
 
Install a bore sight in a barrel, clamp the barrel in a padded vise, then lean or lift the
rear stock while looking through the scope.
You'll be amazed at the movement between the two crosses.
Rest your barrel when shooting instead of the stock and compare results.
Pressure or pull in the least amount will affect your poi.
 
:confused: can't understand you :)
kamlooky said:
Install a bore sight in a barrel, clamp the barrel in a padded vise, then lean or lift the
rear stock while looking through the scope.
You'll be amazed at the movement between the two crosses.
Rest your barrel when shooting instead of the stock and compare results.
Pressure or pull in the least amount will affect your poi.
Click to expand...
 
guntech said:
I seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected...
Click to expand...

Yes it can.

nomad 68 said:
I can't explain it but relieving the rear band seemed to do the trick.
Click to expand...

Its the same mysterious forces and vibrations at play that lead us to free-float our barrels.

I have a Win M70 that was a tack-driver until a gunsmith repaired a busted forend cap and my groups went all to heck. Then I noticed that the new forend cap was pressing against the barrel. A little bit of sanding of the stock's barrel channel was all it took to relieve the wood/metal contact and to bring my accuracy back to normal.
 
ninepointer said:
Yes it can.



Its the same mysterious forces and vibrations at play that lead us to free-float our barrels.

I have a Win M70 that was a tack-driver until a gunsmith repaired a busted forend cap and my groups went all to heck. Then I noticed that the new forend cap was pressing against the barrel. A little bit of sanding of the stock's barrel channel was all it took to relieve the wood/metal contact and to bring my accuracy back to normal.
Click to expand...

Yup, you're right, the guy who's made his living, and a national reputation, building 100's of tack drivers is wrong. Un Fricken Real.
 
How many tack driving 336's have you built Dennis? Have you ever been wrong? :)

OP, was the slot for the barrel band bolt to pass through? Did you re install the original band or just adjust the fit on the new one?
 
Can-down said:
How many tack driving 336's have you built Dennis? Have you ever been wrong? :)
Click to expand...

Built - zero. Wrong - many times.

But I still seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected to the degree you would notice it... Now if there was a noticeable difference that was repeated each time the barrel band was tight and again when loose... then I would agree. Just saying it doesn't make it so... I need more proof.
 
Can-down said:
How many tack driving 336's have you built Dennis? Have you ever been wrong? :)

OP, was the slot for the barrel band bolt to pass through? Did you re install the original band or just adjust the fit on the new one?
Click to expand...
I think the slot was made just to squeeze the mag tube toward the barrel to aid in fitting the new rear band. I will monitor to see if this causes any rust issues in the mag tube.If it does,i'll change the tube.I should have just left the old rear band on but i'm never satisfied and wanted the swivel.If i switch back þo an original band,i will have to search for one because the smith lost mine.I have read up quite abit lately on these rifles and it seems the tightness of the band screws can greatly affect poi. Some like the screws loose and some like them tight.
 
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guntech said:
Built - zero. Wrong - many times.

But I still seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected to the degree you would notice it... Now if there was a noticeable difference that was repeated each time the barrel band was tight and again when loose... then I would agree. Just saying it doesn't make it so... I need more proof.
Click to expand...

I doubt the band is compressing the barrel but it could be changing the way the barrel rests. A business card is also not strong enough to compress a barrel but wedged in the right spot could disappoint an Olympic shooter.
Since the barrel is not free floated , could the change of barrel band effect the harmonics of the barrel?
 
enefgee said:
Yup, you're right, the guy who's made his living, and a national reputation, building 100's of tack drivers is wrong. Un Fricken Real.
Click to expand...
Its the classy members among us and the constructive comments that make this forum what it is :)

guntech said:
But I still seriously doubt a skimpy little barrel band could compress the thick barrel enough that accuracy would be affected to the degree you would notice it... Now if there was a noticeable difference that was repeated each time the barrel band was tight and again when loose... then I would agree. Just saying it doesn't make it so... I need more proof.
Click to expand...
While on the subject of constructive comments, THAT is a good point about the repeatability versus potential perceived cause & effect. Real science is proven science.
 
Do not clamp the barrel in a padded vise or anything else. That's how barrels get bent. Clamp the receiver.
Absolutely no way a skimpy little barrel band could compress the thick barrel at all, but installing it can alter the bedding in the forestock. The slot in the mag tube is likely for clearance. Aftermarket barrel band?
Tack driving 336. HAHAHAHAHAHA. How big are your tacks?
 
sunray said:
. The slot in the mag tube is likely for clearance. Aftermarket barrel band?
Tack driving 336. HAHAHAHAHAHA. How big are your tacks?
Click to expand...
This one will put 3 well inside an inch at 100 all day long with the leverevolution. When i got it back,it was closer to 3 inch groups. Back where it was as of now. Can't wait to work up a load for it.I have my doubts that i can better the factory le ammo though.I wouldn't call it a tack driver but it's the closest i've come with a mag tubed lever action.
 
sunray said:
Do not clamp the barrel in a padded vise or anything else. That's how barrels get bent.
Click to expand...

More crap and run from Sunray.

How many rifle barrels have you seen bent from clamping in a vise? I have been clamping rifle barrels in padded jaw vises forever (well 49 years) and have never bent a barrel doing that. When I have straightened a crooked barrel it takes a lot of pressure to bend it while a 'straight' portion is clamped securely in a vise... the vise simply holding it... basically the vise can not bend a rifle barrel.
 
If there was ever a chance of barrels bending being clamped straight in a vise the Benchrest shooters community would have abandoned it long ago.
I agree with Dennis, been doing it for years and never seen a vise bend or crush a barrel.
How else do you change barrels? Not by clamping the receiver.
 
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