Precision Scope Mounting Tool

[MarikinaMan]

My review, this device is awesome. Its much more simpler than using two bubble levels to level the rifle and the scope at the same time.

You simply slide it in, and with a flash light, check that there is no light coming through the space between the tool and the scope bottom, start torquing down and youre good to go.

Thanks for the tip about the possibility of getting it stuck. I adjusted the tool every few turn of the ring bolts to make aure I could get it out.

I still need to use a plumb bob to calibrate my scope reticle to the scope mounted bubble level. Thats up next.

[MarikinaMan]

The Arisaka is on sale for 25 https://www.midwayusa.com/product/10...mpaign=process

[sigstroker]

I still need to use a plumb bob to calibrate my scope reticle to the scope mounted bubble level. Thats up next.

Tip I read to make it easier - Shine a flashlight through the back of the scope and the reticle will be projected onto a wall. Haven't tried it but it sounds a lot easier than squinting through the scope.

[MarikinaMan]

Tip I read to make it easier - Shine a flashlight through the back of the scope and the reticle will be projected onto a wall. Haven't tried it but it sounds a lot easier than squinting through the scope.

eeenteresting. I will try it.

[MarikinaMan]

Tip I read to make it easier - Shine a flashlight through the back of the scope and the reticle will be projected onto a wall. Haven't tried it but it sounds a lot easier than squinting through the scope.

That was awesome advice. I did it with a plumb bob and validated it with the technique you linked to. I was off 2-3 degrees. Thats a lot if I wanna shoot to a mile



I aligned the reticle to the shadow of the line as the video said.




My process now is to level the scope using the tool, and then calibrate the scope bubble level to the horizontal using this projection method. The tool and this projection technique is now my most favoritest scope mounting method. So easy!

It's almost like using "LASERS"!



Thank you!

[climber32]

That was awesome advice. I did it with a plumb bob and validate it with the technique you linked to. I was off 2-3%. Thats a lot if I wanna shoot to a mile



I aligned the reticle to the shadow of the line as the video said.




My process now is to level the scope using the tool, and then calibrate the scope bubble level to the horizontal using this projection method. The tool and this projection technique is now my most favoritest scope mounting method. So easy!

This is very cool. As well as seemingly fool proof

Level being relative to what it is measured against. Which is why the above method is great. Gravity doesn't lie. Spuhr has included a wedge shaped tool much like the one in our OP's photo with all their mounts from the moment those came on the market. They're really cool. They effortlessly get your scope level WRT the mount. However if your rail is not perfectly level WRT to your action, that tool is of little help. The method above, which is a new one on me, seems like the perfect solution!

[sigstroker]

Very cool. If you had one of those laser boresighters you could even verify the rifle was perfectly vertical and the scope exactly above the bore.

[dozer wright]

Very cool. If you had one of those laser boresighters you could even verify the rifle was perfectly vertical and the scope exactly above the bore.

I've had .ixed results with bore sighters the brass ones that look like shells.
300 Winmag was slightly off.
7.62 x51 works perfectly
5.56not even close.

[beanz2]

That was awesome advice. I did it with a plumb bob and validated it with the technique you linked to. I was off 2-3 degrees. Thats a lot if I wanna shoot to a mile



I aligned the reticle to the shadow of the line as the video said.




My process now is to level the scope using the tool, and then calibrate the scope bubble level to the horizontal using this projection method. The tool and this projection technique is now my most favoritest scope mounting method. So easy!

It's almost like using "LASERS"!



Thank you!

Before you aligned the scope to the plumb bob string, did you make sure that your rifle is sitting perfectly vertical? Or do you assume the Arisaka tool takes care of that?

.

[MarikinaMan]

Before you aligned the scope to the plumb bob string, did you make sure that your rifle is sitting perfectly vertical? Or do you assume the Arisaka tool takes care of that?

.

The scope is level to the rifle. The tool achieves that mechanically. There is no reason to level the rifle since Im not working with bubble levels.

With that done, the plumb bob, by its nature is perfectly vertical. I then calibrate the perfectly vertical scope via the projection, and lock-in the scope mounted bubble level.

[smoothy8500]

Or do you assume the Arisaka tool takes care of that?

The tool "assumes" the mount is centered over the bore. Even if it is not, a perfectly plumb/level reticle is the only thing that matters.

[sigstroker]

I've had .ixed results with bore sighters the brass ones that look like shells.
300 Winmag was slightly off.
7.62 x51 works perfectly
5.56not even close.

So... essentially worthless. Okay, I'll be sure to never buy those.

[ar15barrels]

The scope is level to the rifle.
The tool achieves that mechanically.
There is no reason to level the rifle since Im not working with bubble levels.

But then you say you are working with a bubble level:

With that done, the plumb bob, by its nature is perfectly vertical.
I then calibrate the perfectly vertical scope via the projection, and lock-in the scope mounted bubble level.

So you are setting the RETICLE vertical and the scope mounted bubble perpendicular to the blumb bob shadow.

That's NOT the same as setting the scope mounted bubble with the rifle being level because the reticle could be off from the scope mechanicals and now you have calibrated your bubble level (which defines HOW you will hold the rifle) to be crooked which means you elevation turret won't track straight up and down.

You are making an assumption that the reticle is level within the mechanics of the scope.

It's more important for the gun to sit level when the scope mounted level is locked down than for the reticle to be plumb because you want the GUN to be level when you fire, regardless of if the reticle is level or not.

[beanz2]

The tool "assumes" the mount is centered over the bore. Even if it is not, a perfectly plumb/level reticle is the only thing that matters.

Wouldn't rifle cant make a difference though the reticle is plumb?

[ar15barrels]

Wouldn't rifle cant make a difference though the reticle is plumb?

Depends on if you are dialing or holding elevation.
If the reticle is off from level and you are canting the GUN to get the reticle level, dialing elevation will cause your aiming windage to be off by the amount of cant.
If the GUN is canted from the reticle and you hold the elevation using the leveled reticle, your impact windage will be off by the amount of GUN cant.

This is why bubble levels should be calibrated to the levelled GUN, not the reticle.