Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

verticle stringing

 
LinkBack Thread Tools Display Modes
  #1  
Old 10-08-2012, 02:39 PM
Bronze Member
 
Join Date: Oct 2010
Location: oregon
Posts: 41
verticle stringing

I have a question for the guys that know about this shooting game we all love.I have a 7 ultra that i am having a verticle stringing condition with.The gun is pretty much stock remington j lock 700,it doesnt seem to matter what i feed it it will shoot a nice tight group at 100 but they all climb vertical.What am i doing wrong and how do i fix it?
Reply With Quote
  #2  
Old 10-08-2012, 03:13 PM
Bronze Member
 
Join Date: Aug 2011
Posts: 91
Re: verticle stringing

Quote:
Originally Posted by bullelk6 View Post
I have a question for the guys that know about this shooting game we all love.I have a 7 ultra that i am having a verticle stringing condition with.The gun is pretty much stock remington j lock 700,it doesnt seem to matter what i feed it it will shoot a nice tight group at 100 but they all climb vertical.What am i doing wrong and how do i fix it?

Maybe the barrel is heating up and causing the to POI to change. Is it free floated? Are you putting the rest at different spots on the forearm?
Reply With Quote
  #3  
Old 10-08-2012, 05:38 PM
Gold Member
 
Join Date: Jan 2012
Location: Hot Springs, South Dakota
Posts: 504
Re: verticle stringing

A nice article by Speey Gonzalez CURES for VERTICAL STRINGING
Reply With Quote
  #4  
Old 10-08-2012, 05:42 PM
Gold Member
 
Join Date: May 2009
Location: Australia
Posts: 733
Re: verticle stringing

I would help if you give more detail about how you shoot the gun , bench rest with rest and rear bags ? Bi-pod and rear bag or no bag ? etc etc.
What ammo are you using , factory ? reloads ?
Do you firm up your grip and control recoil or let it push you around ?
There is many things it could be and most likely a combination of several things working together. Sometimes you have to work through changing several things to get the best result.
The fact that the gun is stock standard and the group strings vertical as you shoot suggests to me a bedding issue exacerbated by barrel heating .
If the first cold bore shot after a few fouling shots , hits the mark then the bedding system and barrel floating seems a good place to start .
Followed by shooting style and recoil control review .
Also it is possible for a scope to be faulty and do that but usually they also throw the first shot inconsistently .
After that try different ammo or if reloading try changing seating depths or projectiles as Secant ogive bullets don't like a jump to the lands but Tangent ogive will tolerate some jump.
Reply With Quote
  #5  
Old 10-08-2012, 10:49 PM
Bronze Member
 
Join Date: Oct 2010
Location: oregon
Posts: 41
Re: verticle stringing

Thanks for the replies,now for the things you asked for,i shot the gun on the ground off a short harris bipod and holland rear bag.I shot 1 round waited 10 minutes between shots for each of three shots.The first round hit on center exacly 1 inch high,the next 2 were exactly 1/4 inch above the other.I fired two 3 round groups that are exactly the same.the ammo are factory loads i got with the gun.What they are exactly only god and big green know that secret.the glass is vortex viper pst on 20 moa warne rail with luppy rings,all are tight.I am trying to get this worked out before our bad weather starts and am open to all good ideas on loads for elk and remedies om my trouble.Thanks in advance.
Reply With Quote
  #6  
Old 10-08-2012, 11:37 PM
Gold Member
 
Join Date: May 2009
Location: Australia
Posts: 733
Re: verticle stringing

Check all the action screws are tight. Also if your Harris bipos is a leg notch model don't run it at the lowest un-notched setting as it will bounce about on the springs .
Come up into a notch position . When you shoot of a bi-pod with some recoil you have to load the bipod just before you fire a shot by pushing it slightly forward also make sure the bi-pod feet have not dug a hole in the dirt if on that kind of surface. If so make sure you push forward enough that the feet don't hit the back of any hole or depression .
Don't use the modern sniper prone position of straight behnd the gun it is too difficult for some and encourages the stock to go under the correct shoulder croutch position during recoil. Lay at an angle to the gun , comfort is more important .
So you are telling me that from your first shot went 1" high the next two shots went into a 1/2 inch above that ! What is wrong with that , you have the three shots in a half inch group .
Could you be forgetting that your Zero could already be the 1 inch high mark to start with.
It seems to me that you have a good first shot cold bore gun so that is a big plus when most of our shooting rests on that first shot anyway and it can put three shots into a 1/2 inch . I may be reading something wrong but I don't think you have a big problem .
If I have got it wrong let me know.
Reply With Quote
  #7  
Old 10-09-2012, 12:40 PM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: verticle stringing

Causes of vertical stringing at 100 yards is typically caused by:

* Epoxy bedding pad under the first inch or so in front of the receiver. As the barrel heats up, it gets bigger in diameter. That puts more pressure on it where the bedding pad is.

* Shooter's not putting the rifle butt pad the same place vertically in their shoulder for each shot.

* Shooter's not putting the same pressure from his cheek on the stock for each shot.

* Inconsistant pressure on the stock's fore arm from what it's resting on; especially when there's contact at the fore end tip against the barrel.

* Loose stock screws; either front or back, but not a middle one.

* Barrel's not stress relieved properly after factory bending to straighten it.

* Receiver face isn't square with barrel tenon threads and as the barrel heats up, more pressure's put at the high point of contact; either at the top or bottom of the receiver face.

Oft times folks blame muzzle velocity spread as the culprit. But even a medium size cartridge such as the .308 Win. has only 2/10ths inch vertical shot stringing from a 100 fps velocity spread.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: verticle stringing
Thread Thread Starter Forum Replies Last Post
time to anneal and fl size?groups are verticle? 30-06 boy Rifles, Bullets, Barrels and Ballistics 3 10-25-2008 11:14 AM
Stringing way to the right...Why? EXPRESS Rifles, Bullets, Barrels and Ballistics 2 11-18-2007 07:45 PM
Vertical stringing---Causes? hank shaper Long Range Hunting & Shooting 13 02-07-2007 02:05 PM
a cause for horizontal stringing splattermatic Rifles, Bullets, Barrels and Ballistics 7 01-28-2007 09:31 PM
My SAvage 10 FP LE2B Verticle stringing coupalr Rifles, Bullets, Barrels and Ballistics 2 08-19-2006 02:03 PM

Current Poll
Do you archery hunt for elk?
YES - 31.86%
65 Votes
NO - 51.96%
106 Votes
Not yet, but I plan to. - 16.18%
33 Votes
Total Votes: 204
You may not vote on this poll.

All times are GMT -5. The time now is 01:22 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC