Rifle Scopes 2nd focal plane calibrated reticle mil-dot / NP-R2

[michael_aos]

Say I have a Leupold Mark 4 MR/T M2 2.5-8x36mm with the TMR reticle. P/N 60180.

At an indicated 8x setting, there are dots every 1/2 mil, and hashes every mil. If I move it to an indicated 4x, are the dots now every 1-mil, and hashes every 2-mil?

Or if I had a Nightforce 3.5-15x50mm with the NP-R2 reticle. At the 15x setting, there are hashes every 2-MOA. If I set it around 7.5x, are the hashes now every 4-MOA?

Or does it go the other way? Or is it non-linear?

Mke

 

[matchking]

Re: 2nd focal plane calibrated reticle mil-dot / NP-R2

Correct, though the exact power that will double the mil spacing needs to be verified. I have an 8.5-25x where the "double point" is near the 15x mark on the power ring. I will usually confirm the location and mark it somehow.

 

[Rafael]

Re: 2nd focal plane calibrated reticle mil-dot / NP-R2

I agree.
Also, you can use a mil reticle as MOA or an MOA reticle as mil using this method.

 

[Advokaten]

Re: 2nd focal plane calibrated reticle mil-dot / NP-R2

A.

In theory you are right, half the X, tvice the with cowered by the reticle.

B. The question where is this on your scope, can you reliably come back to that X again?

C. Conclusion, get a 1 meter long stick, have it marked of every 10 cm/about 3.93 inches, set it out at 100 meter, that is your stick x 100,

and get to calibrating/verifying that scope.

I have the very same interesting task at hand with a Mark 4, 6,5-20 that I just got from a member here,

I need to know where I have the halftime values as well, ie where that is on the X-ring.

Take care use a safe measuring stick.

Best regards Chris

 

[Lindy]

Re: 2nd focal plane calibrated reticle mil-dot / NP-R2

The end of this article gives you a procedure for calibrating the half-power point:

Optically Checking Rifle Scopes