Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels & Ballistics

Rifles, Bullets, Barrels & Ballistics Applied Ballistics


Reply

Help scope moa problem

 
LinkBack Thread Tools Display Modes
  #1  
Old 03-10-2013, 05:48 PM
Platinum Member
 
Join Date: Jan 2009
Location: Rochester, NY
Posts: 1,483
Help scope moa problem

I just got a new scope and it has about 50 MOA of adjustment, not much really. I'm using it on a 308 BAR that is very accurate, with the last scope. Today I mounted the scope and it is almost against the rail. The rail is -0- MOA. I had to crank the elevation up all the way and was still 2 inches low at 100 yards. WTF, I guess I don't understand the scopes bore line and the guns bore line correctly. What should I do now? Mabe someone can explain this to me. Almost all of my rifles have a 20 MOA and scopes, 50 or more MOA. I guess I haven't shot long enough to have had to dial all the way up?

I'm out of elevation and 2 inches low at 100. Should I be shooting backwords!? lol

Please explain. Maybe the dial on my scopes is backwards? haha

HELP.
Reply With Quote
  #2  
Old 03-11-2013, 06:39 AM
Platinum Member
 
Join Date: Jan 2009
Location: Rochester, NY
Posts: 1,483
Re: Help scope moa problem

Still looking for someone that understands bore line and scope height to scope bore line. I can't use any of the MOA on my scope at the moment as something appears wrong with the height of the rings on my scope. Other possibilities are, elevation knob was put on backwards or the manufacturers rail put on backwards and slopes the wrong way (MOA) making the MOA negative?

Thanks
Reply With Quote
  #3  
Old 03-11-2013, 09:06 AM
Platinum Member
 
Join Date: Jan 2013
Location: Meridian, Idaho
Posts: 1,387
Re: Help scope moa problem

I am no expert so who know's what you might glean from this: check the total moa of the scope and see if it is even working first. For example, set the rifle up on bench and locked down well. Look through the scope and turn the elevation dial to full up. While looking throught the scope you should see the reticle move. Now turn the elevation to full down and count the clicks, MOA, or turns until you see no more reticle movement. That is your total movement and will tell you if the scope is even working.

If it is, then perhaps the rail is in fact on backward if it is 20 moa rail. If it is a 0 moa I don't see how it matters.

I would guess you need a 20 MOA or even a 40 MOA rail if the scope is working correctly to be close to the center of the scopes movement or have that scope repaire or replaced. Perhaps use of your other scopes to double check?

??
Reply With Quote
  #4  
Old 03-11-2013, 09:40 PM
Platinum Member
 
Join Date: Jan 2009
Location: Rochester, NY
Posts: 1,483
Re: Help scope moa problem

Thanks Brett. I went back to the shop but those guys are like you and me, although, the rings are so low, the scope is touching the rail, possible pulled by the rings? I took it off and there is no dent, but is it possible I bent it a touch? I put a cleaning rod in the muzzle gently and then put a level on it until it was level. I had it in the vise so I then took the level and put it on the rail and it is about 3/8" higher in the front, so I'd guess that is 20 MOA? Seems correct to me, scope slanting upward?

I'm going to try higher rings, as that's the only thing I can think of? The MOA dial moves the scope properly. I'll update this after I check it out at the range.

Thanks
Reply With Quote
  #5  
Old 03-11-2013, 10:22 PM
Silver Member
 
Join Date: Apr 2009
Location: New Mexico
Posts: 230
Re: Help scope moa problem

If it is a sloped rail, the higher portion should be towards the rear with the shorter piece to the front! Take the base off and measure it with some calipers, if it has any slope at all you will be able to measure the difference, it needs to,slope forward.....this may be your issue if there is any slope to your rail.
Reply With Quote
  #6  
Old 03-11-2013, 10:37 PM
Platinum Member
 
Join Date: Jan 2009
Location: Rochester, NY
Posts: 1,483
Re: Help scope moa problem

I think it is the opposite, you want to add MOA, it should slope upwards.
Reply With Quote
  #7  
Old 03-11-2013, 10:40 PM
Platinum Member
 
Join Date: Jan 2013
Location: Meridian, Idaho
Posts: 1,387
Re: Help scope moa problem

Cwinner is right
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 12:50 PM.


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