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vertical stringing
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Picture of beretta96
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My rifle now has a slight case of vertical stringing. It seems to happen only when it warms up, not hot to the touch though. It's not a big concern, the first 20 go where I want them to, just curious as to the possible cause and solution.


http://s163.photobucket.com/albums/t302/hannahcarlo/?ac...338federaltarget.jpg


Thanks,
Mike
 
Posts: 263 | Location: ontario, canada | Registered: 10 January 2007Reply With Quote
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More then likely it's a pressure point on the forearm... It would be good to know for the others that might comment on this thread as to what rifle it is... I assume by the photo that it's chambered in 338 Federal but who's the manufacturer, etc??

Ken....


"The trouble with our liberal friends is not that they are ignorant, but that they know so much that isn't so. " - Ronald Reagan
 
Posts: 5386 | Location: Phoenix Arizona | Registered: 16 May 2006Reply With Quote
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Sounds like a bedding problem.


David
 
Posts: 332 | Location: Backwoods Of Kentucky | Registered: 18 September 2005Reply With Quote
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It would be interesting to see what would happen if the barreled action was dropped into another stock.
 
Posts: 11651 | Location: Montreal | Registered: 07 November 2002Reply With Quote
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I had the same problem with a ZG47 stringing shots up in a straight line. Removed the recoil lug screw and started giving me normal groupings although not very tight.
 
Posts: 603 | Location: Louisiana USA | Registered: 24 August 2007Reply With Quote
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"the first 20 go where I want them to"
You shoot 20 shots and your barrel shocker isn't hot?


The only easy day is yesterday!
 
Posts: 2758 | Location: Northern Minnesota | Registered: 22 September 2005Reply With Quote
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Have you tried a "lick and a promise" type cleaning after about 15 shots? (That is, one wet patch & 2 dry patches.)

If done quickly enough, the barrel would still be warmish. Then you could shoot another 10, for a total of 25, and see if it was doing it then. I suspect bedding, but some rifles start to shoot strangely after a bunch of shots without cleaning. Yours might be one of them.
 
Posts: 9685 | Location: Cave Creek 85331, USA | Registered: 17 August 2001Reply With Quote
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The rifle is a Rem 700 338 Federal with a 24" Lilja barrel, varmint contour, in a HS Precision stock, fully floated from action forward.

After 20 rounds not quick ones mind you, I shoot 5, change target and so on. The barrel is only warm. I figure by the time I walk 200 yards and back, should be cool enough for another string.

I'll try the "lick and promise" trick, and the front screw tension as well as a longer cool down and see what happens.

Like I mentioned earlier, it's only mildly annoying since the first 15 or 20 rounds go where they're suppose to so it's a non-issue for hunting.

http://i163.photobucket.com/albums/t302/hannahcarlo/Picture.jpg

Here is the previous target, excuse the flyer, my fault.
 
Posts: 263 | Location: ontario, canada | Registered: 10 January 2007Reply With Quote
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The first thing to check, as it has been stated, is bedding.

The second is barrel fouling.

A thirs, very unlikely, is barrel warping

And the fourth is you. After 20 rounds with a 338 Magnum, your stock weld may be off, or you are flinching!
 
Posts: 1228 | Registered: 10 October 2005Reply With Quote
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The barrel is touching the stock slightly in the barrel channel. Rund a dollar bill between the barrel and barrel channel next time you're shooting and it warms up.
 
Posts: 2627 | Location: Where the pine trees touch the sky | Registered: 06 December 2006Reply With Quote
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I would have to agree with AC on this one .
Acts like it's dirty . Walking 200 Yd. changing target is plenty of time for a cool down .

Try this first . Clean the bore real good , then shoot a group of 10 rounds with 1 -1.5 minutes between each round . See what kind of group this gives you . If it starts acting up after say 5 suspect something else bedding or stock shift . It doesn't sound like a heat problem at all .

Shoot straight know your target . ... salute
 
Posts: 1738 | Location: Southern Calif. | Registered: 08 April 2006Reply With Quote
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I suspect that the group you show is about 3/4" or thereabouts...That is not vertical stringing btw, its a nice accurate rifle...

What you are refering to as stringing is most likely your shooting (again which ain't bad) A shift in grip, hold or about anything can cause that.

To analize a group like that I would need to have the shots numbered as they hit, you would have to show me that it does that each time.

Unless your just target shooting then why would you even be concerned, it certainly shoots well enough for varmint and big game hunting.

If your a target shooter then you must consider mirage, your loads, shooting style, bench hold, and a magnitude of possibles. You can do this through a process of elimination..


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com
 
Posts: 42190 | Location: Twin Falls, Idaho | Registered: 04 June 2000Reply With Quote
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+1 on what Ray said.
 
Posts: 2034 | Location: Black Mining Hills of Dakota | Registered: 22 June 2005Reply With Quote
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I am with Ray, also. Surely there is more to life than this.
 
Posts: 1077 | Location: Mentone, Alabama | Registered: 16 May 2005Reply With Quote
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I would be real happy with that group.
But, if you are really interested in making it better, do what the guys above said about checking the forearm bedding. I suspect the barrel is touching the stock somewhere.

Don




 
Posts: 5798 | Registered: 10 July 2004Reply With Quote
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Dang nice group to my eyes. I think you must have not much to worry about and are in the habit of worrying. Take that gun and use it. Or I guess you could sell that sorry piece of crap to me really cheap. I will give you $50 if you throw in the scope. Good hunting. "D"


Although cartridge selection is important there is nothing that will substitute for proper first shot placement. Good hunting, "D"
 
Posts: 1701 | Location: Western NC | Registered: 28 June 2000Reply With Quote
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Thanks for all the input, I'll try a few ideas this weekend at the range. It's been busy here, trying to finish off all chores before moose and deer seasons start. I don't like loose ends while I'm away.

This rifle is a bone of contention with the wife and I, everything I do has to be to my satisfaction or I keep fidling until I'm content. She thinks like everyone else, it's more than accurate enough just enjoy.

But you know, I'll bet a nice Mcmillan stock with a pistol grip would be really comfortable to shoot! I'll mention it to the boss, see if she flips!!!
 
Posts: 263 | Location: ontario, canada | Registered: 10 January 2007Reply With Quote
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One thing about good guns, if it ain't broke, don't fix it!! Smiler It seems that everytime I get into one of those deals it ends up costing me money or I screw it up!

Tinker with your loads but don't touch it with a screw driver.Smiler


Ray Atkinson
Atkinson Hunting Adventures
10 Ward Lane,
Filer, Idaho, 83328
208-731-4120

rayatkinsonhunting@gmail.com
 
Posts: 42190 | Location: Twin Falls, Idaho | Registered: 04 June 2000Reply With Quote
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quote:
Originally posted by Atkinson:
One thing about good guns, if it ain't broke, don't fix it!! Smiler It seems that everytime I get into one of those deals it ends up costing me money or I screw it up!

Tinker with your loads but don't touch it with a screw driver.Smiler



+1 thumb

The more I look at your posted group, the more I suspect the problem (if any) may simply be "bench technique". That is not intended in any way to insult your shooting. You obviously are a fine shooter, with an equally fine rifle. It is just to say that little things, such as a front sand bag packed a little too hard with filler, can often cause that little tiny bit of vertical stringing...

As the gun bounces on the front bag with each successive shot, the filler can pack a little harder. And, as the front bag surface gets "harder", it presents a surface that a light ("sporter") stock may "bounce" a little farther away from each shot.

I know that sounds hard to believe, but I had to learn it the hard way in benchrest competition. It can and sometimes does happen.

So, I'm with Ray, and your wife. Don't putz with your rifle's mechanics. Just make sure it is clean enough, tweak your loads perhaps a tiny "skosh", and examine your bench techniques to assure everything is consistent from shot to shot. Betcha your groups will be just fine that way.


My country gal's just a moonshiner's daughter, but I love her still.

 
Posts: 9685 | Location: Cave Creek 85331, USA | Registered: 17 August 2001Reply With Quote
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I never take offence to any critics of my shooting from people on forums like these. I'm sure most people here have shot rifles longer than I have and at greater range. A long rifle range here is 200 yards, and I have found a sand pit behind the mine I work at where I can shoot to 300 yards.

I'm basically self taught with reading articles from David Tubb etc... I'm sure there's many ways I can improve. I don't have any sand bags as of yet, I tried them and liked them. Currently i'm using a MTM adjustable rifle rest. It's not bad, but I can't explain why I haven't upgraded.

I'm going to the range this weekend so I'll reply later.

Mike
 
Posts: 263 | Location: ontario, canada | Registered: 10 January 2007Reply With Quote
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After looking at you groups, and reading the posts above, I would second not touching the rifle until after you try the cleaning mid-serial.
Some BBls are sensitive to fouling, some aren't.
FWIW, 20 shots seems plenty for any hunting short of a cull.
JMHO, and 0.02 worth, adjusted for inflation...

Give it a try, and maybe let us know how you get on?

Good group, BTW!


Cheers, Dave.

Aut Inveniam Viam aut Faciam.
 
Posts: 6716 | Location: The Hunting State. | Registered: 08 March 2005Reply With Quote
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