Go Back   Maryland Shooters > The Arsenal > Rifles

Notices


Reply
 
Thread Tools Display Modes
Old May 17th, 2018, 08:03 PM #11
davsco's Avatar
davsco davsco is offline
Senior Member
 
Join Date: Oct 2010
Location: Loudoun, VA
Posts: 4,727
Images: 4
davsco davsco is offline
Senior Member
davsco's Avatar
 
Join Date: Oct 2010
Location: Loudoun, VA
Posts: 4,727
Images: 4
again, maybe attach a few pics there. if there is something wrong with your setup, sure someone here will see that and let you know...
davsco is offline   Reply With Quote
Old May 18th, 2018, 05:11 PM #12
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,034
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,034
Sometimes the barrel extension isn’t square to the upper receiver and the barrel will sit a little cockeyed.

This throws off iron sights, and is probably what is throwing off your scope.

Bottom line, it might not be a problem with the scope but the upper.

Brownells makes a lapping tool the will square it, or it’s an easy job for a gunsmith.
Major03 is offline   Reply With Quote
Old Yesterday, 09:13 AM #13
ras_oscar ras_oscar is offline
Member
 
Join Date: Apr 2014
Posts: 735
ras_oscar ras_oscar is offline
Member
 
Join Date: Apr 2014
Posts: 735
Quote:
Originally Posted by davsco View Post
again, maybe attach a few pics there. if there is something wrong with your setup, sure someone here will see that and let you know...
I'll take a few pictures of the scope mounted on the rifle. Any specific detail shots recommended in addition to the overall left/right/top/bottom?

I found that my elevation setting is within a few clicks of the stop, so I know I have some work to do. I assume I *could* shim the front or rear between the scope and the mount, but I'm not sure how I would shim to adjust windage. I counted at least 150 clicks of windage in one direction before I gave up and returned to zero.

As a reminder, I am using a Nikon M308 One piece scope mount. I *assume* the front and rear rings would be lapped in the factory far more precisely than I could accomplish using hand tools and a vice.
__________________
I'm a democrat and I support the second amendment . Deal with it.
ras_oscar is offline   Reply With Quote
Old Yesterday, 09:44 AM #14
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,034
Major03 Major03 is offline
Senior Member
 
Join Date: Jan 2013
Location: Northern Maryland, Baltimore County
Posts: 1,034
Personally, I'm not a fan of the shimming method to correct a poorly aligned scope. I think you'd be better served by figuring out what the underlying cause is and fixing that.

My bet is the following in order:
- out of square upper to barrel extension causing the barrel to be off center to the upper / bolt face. Fixing this BTW should make things a touch more accurate too
- scope base is jacked up, replace if needed
- rings are jacked up, if so they can be lapped to fix that problem.
- scope is jacked up, replace if needed
Major03 is offline   Reply With Quote
Old Yesterday, 11:46 AM #15
smdub's Avatar
smdub smdub is offline
Senior Member
 
Join Date: Nov 2012
Location: MoCo
Posts: 2,918
smdub smdub is offline
Senior Member
smdub's Avatar
 
Join Date: Nov 2012
Location: MoCo
Posts: 2,918
This your nikon mount? Specifically, the TWO separate rail clamps. That one is *TOTAL SHIT*. I had the 223 version. It will not auto center and you can easily tighten it down w/ the center part not parallel to the pictinny rail. Prove it to yourself: Loosen the clamps, twist it w/ the scope grossly to one side (windage), and re tighten. It will still visibly retain a lot of the offset. You could probably get it close enough centered to work, but I always worried about it holding zero. If you do have that kind of mount, my suggestion is to throw it in a deep lake and get a different mount. One that has one side of the rail integrally machined w/ the upright part. Nikon makes some mounts made correctly, but they still sell that crap 2-pc clamp type in both 223 and 308 variants
Attached Images
 
__________________
NRA, CCRKBA, & SAF life member, MSI member
smdub is offline   Reply With Quote
Old Yesterday, 10:33 PM #16
ras_oscar ras_oscar is offline
Member
 
Join Date: Apr 2014
Posts: 735
ras_oscar ras_oscar is offline
Member
 
Join Date: Apr 2014
Posts: 735
That's the mount, with the 2 piece clamp. I will try returning the reticle to the midpoint both directions and then try messing with the 3 screws to see if I can get it closer. Assuming I am forced to replace the mount, Is there a better one piece mount for 308?
__________________
I'm a democrat and I support the second amendment . Deal with it.
ras_oscar is offline   Reply With Quote
Old Yesterday, 11:23 PM #17
quad's Avatar
quad quad is offline
Another Hooligan
 
Join Date: Mar 2011
Location: Allegany County
Posts: 822
quad quad is offline
Another Hooligan
quad's Avatar
 
Join Date: Mar 2011
Location: Allegany County
Posts: 822
Burris PEPR is a great mount ��
__________________
Some talk of the Second Amendment as if it were negotiable, It isn't.....The last defense against tyranny cannot be traded for anything, for there is nothing equal in value to the only right that can and does protect all others.
quad is offline   Reply With Quote
Old Today, 12:13 AM #18
danb's Avatar
danb danb is offline
W T F
 
Join Date: Feb 2013
Location: Howard County
Posts: 14,743
danb danb is offline
W T F
danb's Avatar
 
Join Date: Feb 2013
Location: Howard County
Posts: 14,743
Leupold and Warne both make good 1pc mounts. I have 1 pc Warne on some rifles, never had a problem. Warne XSKEL1 gen 2 (1 in) and XSKEL30 Gen2 (30mm) both come in colors too. Send it in style.
Holster
danb is offline   Reply With Quote
Reply

  Home Page > Forum List > The Arsenal > Rifles


Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools
Display Modes

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 -4. The time now is 04:05 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
2018, Congregate Media, LP Privacy Policy Terms of Service