need help trueing a scope to a new mount

[battlemidget]

I have a new mount for a 30mm tubed scope that I need trued to the mount. If someone here has a doohicky, whether it's shims or some sort of jig, I'd appreciate the assist. I'll come to you, anytime, anywhere in El Paso county/springs. I'd rather not pay a smith for the work.
Please PM me here if you can assist.
Thanks!

[Tim K]

One piece mount?

[battlemidget]

Yes, Midwest Industries QD, 2.8" offset

[XJ]

I’ve been procrastinating mounting several scopes for a while myself.

It looks easy on youtube…

[mb504]

I must be missing something.. If it's a one piece mount, what's there to do? Mount the mount to the gun, put the scope in the mount, level the mount/gun, set your front/back position, level the scope, tighten it down.

[Tim K]

Yeah, that’s why I asked if it was a one piece mount.

Battlemidget, exactly what do you mean by “trued to the mount”?

One piece mounts are typically machined pretty true and require no additional work.

[battlemidget]

Used a bubble level as best I could but it still feels off. I'm looking for some sort of mechanical 'trueing' between the flat bottom of the scope and the flat part of the mount, like a wedge kit or similar.

[Batteriesnare]

How much space is there between the top of the mount surface and the bottom of the flat of the turret of the scope? I have one of those arisaka leveling wedge kits if you'd like to try that, but have found that it's not super awesome with some of the AR mounts as there's not enough space to get the tool in there. Plumb-bob is always good too.

[asystejs]

Used a bubble level as best I could but it still feels off. I'm looking for some sort of mechanical 'trueing' between the flat bottom of the scope and the flat part of the mount, like a wedge kit or similar.

Like this ?
Arisaka Optic Leveler (https://arisakadefense.com/optic-leveler-small/)

[earplug]

Nice tool.

[battlemidget]

3/16" between flats, I think it's too tight for the arisaka tool. I wish all mounts came with a leveling screw.

[Tim K]

I can help you with it if you like. I generally level the rifle with a bubble level and then line up the reticle with something I know is plumb. Alternatively, I’ll use a stack of paper shims between the top of the mount and the bottom of the scope if I’m in a hurry.

The former method gets the reticle plumb. The latter gets the erector plumb. Which is more important to you (the reticle is not always perfectly aligned with the erector) depends on weather you will primarily be shooting at longer ranges off the reticle or if you’ll be dialing the scope. Unless you have a level on the rifle, none of it makes a lick of difference since you’ll be canting the rifle no matter what.

PM me if you want some help. I’m in Woodland Park

[Hoser]

I use feeler gauges to get the bottom of the erector housing parallel with the mount.

However the reticle might be off a few degrees which could be your problem.

[arbol]

The second I get mine all tru'ed up, I get in a conversation, and spin the wheel out of nervous energy. ;)

Once you get it tru'ed up, lock it down nice and tight.

-John

[battlemidget]

I use feeler gauges to get the bottom of the erector housing parallel with the mount.

However the reticle might be off a few degrees which could be your problem.

That's a good point, thanks!

I've gotten alot of good ideas from this thread, y'all are awesome. I'm going to shim with a deck of cards, I got some stiff 30 year old E&E playing cards with edible plants and tiny ass print that I'll never be able to read without a microscope, so glad I hung onto that. I'll do that while I look at the reticle over a plumbline at distance.
There's 2 clamps, should I obsess over the gaps on the sides of the clamps, or is a little incongruence ok?

[Tim K]

I like the gaps to be very close to equal. I don’t think it matters in the slightest, but the amount of effort required to equalize the gaps is small compared to the reduction of noise in my brain if they are not.

[Oscar77]

Wow, I absently mindedly clicked on this and found out something cool here!
Thanks!

[earplug]

A old spark plug gap tool helps with equalizing ring gap.