The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > The Smithy

Reply
 
Thread Tools
Old March 20, 2012, 05:16 PM   #1
chrisb38002
Member
 
Join Date: August 28, 2005
Posts: 18
alignment question, totoally confused!

Ok, here is what I have. Savage model 12FV, 26" heavy barrel, in 308. I have a Nightforce Benchrest scope mounted on a Warne 20MOA rail.
Problem- with the 20moa rail, I should be about 20" high at 100 yards, everything else being aligned. I have the elevation on the scope maxed out (can't bring the shots down any more), but still hitting about 8" high at 100. BTW, the scope has 40moa of adjustment.
Here is the kicker, at 300 yards, I am hitting 19-20" high, without moving the scope, still maxed out, so I can't bring my shots down.
Any ideas why my point of impact is so high? I should be able to dial in to zero the scope at this range with my mount.
I'm open to any ideas.
chrisb38002 is offline  
Old March 20, 2012, 06:46 PM   #2
smoakingun
Senior Member
 
Join Date: April 12, 2009
Location: melrose, fl
Posts: 634
just to cover some basics. Is the rail tight on the reciever? Are the rings torqued evenly on the rail, Are the ring caps tight? Is the eye relief set properly? is the image viewed through the scope clear, no shadow around the edges? It is strange that the rifle is shooting higher at 300 than at 100. If I had a problem like this, I would be hunting for my glasses and making sure everything was right and tight
__________________
Hundreds of years from now, it will not matter what my bank account was, the sort of house I lived in, or the kind of car I drove... But the world may be different because I did something so bafflingly crazy that my ruins become a tourist attraction.
smoakingun is offline  
Old March 20, 2012, 07:31 PM   #3
emcon5
Senior Member
 
Join Date: July 10, 1999
Location: High Desert NV
Posts: 1,607
Quote:
It is strange that the rifle is shooting higher at 300 than at 100
Actually that is expected. With his excessive elevation, the rifle is essentially zeroed at about 600 yards, and at 300 the bullet is still going up, almost to the apogee of the trajectory.

You don't have tapered rings as well do you? 20MOA rings, plus 20MOA base could cause what you describe.

Assuming everything is put together properly, and properly torqued, you can try reversing your rings, see if that changes anything.
emcon5 is offline  
Old March 20, 2012, 07:52 PM   #4
Jim Watson
Senior Member
 
Join Date: October 25, 2001
Location: Alabama
Posts: 10,986
A friend had the opposite problem with a Savage.
A 20 MOA base would barely let him get on at 1000.
He had the base modified for more taper so he could zero for Long Range without off-centering his adjustments so badly.

All we could think of was that his receiver was not quite straight... he had not had it blueprinted or aligned, and was using it as it came from the factory.
He has since had it rebarrelled without the Savage Nut. I don't know if it were straightened in the process or how it sights in now.

What range do you wish to shoot at? If 100-300 or even 600, a level base would be suitable.
Jim Watson is online now  
Old March 20, 2012, 08:01 PM   #5
chrisb38002
Member
 
Join Date: August 28, 2005
Posts: 18
To answer Smoakingun's questions, yes to all. I have checked and torqued everything.
From what I calculate, Emcon5 is right, I am zero'ed at somewhere between 500 to 600 yards.
I don't think the bases I have, which are leupold, are tapered, but I may have to check again. I have not tried switching them front to back.
Other than the elevation, the gun is right on, my windage is nearly dead center to the scope, and the gun can group 1.5" at 300 all day long. I shoot at ranges from 100 out to 1000, so the 20moa would be fine, just don't need 40.
chrisb38002 is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:54 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06592 seconds with 9 queries