Rifle Scopes AI mount/feeler gauge question?

bm11

bm11

Gunny Sergeant
Full Member
Minuteman
Jun 18, 2010
2,562
13
41
Maine
#1
My new scope is on it's way, which means I'm going to have to mount it. I am using my existing 18moa AI mount on my AW, I just need to make sure that the feeler gauge method will work, if not, I'm going to need to order a set of levels.

I ask because I want to make sure that the mount has a level surface. I can't tell by looking at it if it has been milled at an angle.

Thanks,

-Bob
 
#2
Re: AI mount/feeler gauge question?

one ring is taller than the other so the ring centers are not parallel to the bottom of the base. Unlike a XX MOA base that then has rings installed onto it, then the rings ane base are parallel to each other as the base shortens to make the diffrence.
 
#3
Re: AI mount/feeler gauge question?

The feeler gauges will work you are working across the flat so it doesn't matter the cant.

Invest in a piece of string with a weight and ditch the idea of a level. mount it and then check it with a piece of string.
 
#4
Re: AI mount/feeler gauge question?

So what your saying is don't worry if the feeler gauges cant go through all teh way, as long as the scope bottom is flush against what can fit your ok?
 
#5
Re: AI mount/feeler gauge question?

Yes, from front to back the cant only changes things a very tiny amount. 20/1000ths at mount, and that is the total distance, not the distance the feeler gauges will span.

In fact the new SPUHR mount has a key / notch built into the mount to level the scope... same principal executed in a better way. It also has a cant built into it.

The mount and scope are canted the same, if one ring it technically "higher' then one side of the scope is too... still parallel.
 
#6
Re: AI mount/feeler gauge question?

To clarify, I wasn't worried about the front to back 18moa cant, that should be consistent with the cant the scope will be mounted at. I was worried about side to side level on the mount.

As for checking it with a plum line, that will only work if I have a solid method to verify the rifle is level.

Speaking of that, is there anyone that makes a level that mounts to the AI dovetail?
 
#7
Re: AI mount/feeler gauge question?



The feeler gauges will have it level side to side with no problem. I thought you were looking at the base of the scope being perfectly parallel to the bottom of the base. I took this picture quick and you can see that the scope is tlited forward already. The left side of the pic is the bell, I can sneek up the rear with .031 on the feeler gauges then they stop half way. .021 clears the rest of the way.

DSC_0188.jpg
 
#9
Re: AI mount/feeler gauge question?

You're putting way too much thought into it...

Here is the SPUHR Mount, consider this if you are worried about it.

Key inserted
spuhr3.jpg



no key channel
spuhr4.jpg


The SPUHR has an AI Dovetail version, and there is a level built in the back.
 
#10
Re: AI mount/feeler gauge question?

Thanks for the help guys.

LL- that mount looks pricey, what's it run? I already have a mount and wasn't looking to rebuy, just making sure I had the appropriate tools on hand when the time came.
 
#12
Re: AI mount/feeler gauge question?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bm11</div><div class="ubbcode-body">To clarify, I wasn't worried about the front to back 18moa cant, that should be consistent with the cant the scope will be mounted at. I was worried about side to side level on the mount.

As for checking it with a plum line, that will only work if I have a solid method to verify the rifle is level.

</div></div>

The feeler gauge method will eliminate side to side cant providing you get a good enough fit under to scope.

Regarding the plumb line - There may be a more scientific way to verify the rifle is level but to be honest trust your eyes! Sit the rifle on front and rear rests so its parallel. Have a good look from behind the rifle (dialling the scope to minimum mag and parallax) then follow the line up from the stock through the cross hairs. If you've used the feeler gauges make the assumption that the cross hairs are now straight and level them with the plum line. The rifle should look square on if everything has been done right.
 
#14
Re: AI mount/feeler gauge question?

I'm not too stressed, it's not rocket science. I'll box test it when it's all said and done, to make sure I got it right.
 
#17
Re: AI mount/feeler gauge question?

I have same mount and i did it with gauges and its perfectly centered i also did check all the standard test and still it worked. Only problem i had is that i overtightened rings as they are build the russian way luckly no damage to the scope tube just parallax got little stuck (until i loosened up front ring a bit)...:)

Price? Shooting sports? Those three words go hand in hand...
 
#18
Re: AI mount/feeler gauge question?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ROLEXrifleman</div><div class="ubbcode-body">I wonder how much an oil chane is?

Words you will never hear a Bentley owner say!! LOL</div></div>

Ha Ha,

<span style="font-style: italic">"ya, only change 10 of my 12 plugs in the Continental GT, the last two put me over the top in cost ". </span>
 
#20
Re: AI mount/feeler gauge question?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lowlight</div><div class="ubbcode-body">Expensive ? ! ?

You own an AW... expensive is no longer relevant to the conversion. Welcome to the life of the owning the finest built sniper rifle in the world.

</div></div>Good call, I have an AW and a Schmidt and Bender, and I'm acting like the price would be a dealbreaker on a good mount!
 
#21
Re: AI mount/feeler gauge question?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ROLEXrifleman</div><div class="ubbcode-body">I wonder how much an oil chane is?

Words you will never hear a Bentley owner say!! LOL </div></div>You would be surprised, ha ha! Service gets expensive on high end stuff. The Mercedes garage wanted $500 for the 20k service on my wifes car, and after a little shrewd reading, it turned out to be nothing more than a glorified oil change and inspection. We did it with a Mercedes filter and Mercedes Mobil 1 at my dealership, and the total bill was about $100.

The 60k on my M3 runs close to $2k, and I'm looking for a way around that as well!

Not that I'm in Bentley territory by any means, but my as a car dealer my experiences have told me that the more financially capable the customer, the harder a time they have with parting with their money. I imagine Bentley service writer gets shit all the time!
 
#22
Re: AI mount/feeler gauge question?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bm11</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lowlight</div><div class="ubbcode-body">Expensive ? ! ?

You own an AW... expensive is no longer relevant to the conversion. Welcome to the life of the owning the finest built sniper rifle in the world.

</div></div>Good call, I have an AW and a Schmidt and Bender, and I'm acting like the price would be a dealbreaker on a good mount! </div></div>

So true. Would you use the SPURH on your $7k AIAW with your $3k S&B if it cost $80?

If the SPURH was any less than $300 I wouldn't touch it.
 
#23
Re: AI mount/feeler gauge question?

I was just shopping earlier this week for a mount for my new AE and saw a price of just under $400 for the SPURH mount, I don't remember where that was - but of course google to the rescue would likely find it, or wait until Monday for the GB here it sounds like. I ended up with the AI mount in the end because I wanted something right now.
 
You must log in or register to reply here.

Similar threads

ROLEXrifleman
AI One Piece mount question (need measurements)
Replies
0
Views
128
ROLEXrifleman
ROLEXrifleman
W
Optics WITHDRAWN - Nightforce ATACR!
Replies
1
Views
337
tacguns
T
R
did i made an error while mounting this scope?
Replies
29
Views
1K
JWG
J
S
Scope clarity question
Replies
47
Views
1K
supercorndogs
supercorndogs
Gentleman4561
Leveling scopes…tools?
Replies
16
Views
1K
JWG
J
Top Bottom
Back
Home
Forums
Merch
Alerts