Rifle Scopes How do I check click adjustments...UPDATED>>>

[summitsitter]

I have a MK4 that im thinking is iphy instead of moa. im woder how to accuratly check it. Ive seen the process of using a yardstick at 100yds and dialimg the scope an checking it based on the ruler. Only problem I can see with is holding the rifle steady enough to get accurate readings.. Any suggestions.

 

[KNIGHT11B4]

Re: How do I check click adjustments

You need a solid rest to box check.

Either buy a solid sled or create a solid rest so that when you adjust the scope the rifle does not move.

I would first check with Leupold to see what they say the increments are. They should be able to tell you whether your Mk4 is IPHY or MOA. You then can box check to verify the accuracy of the adjustments.

Remember the difference between IPHY and MOA can appear slim at closer distances... 1 inch VS 1.047 inchs @ 100 yards

 

[5RWill]

Re: How do I check click adjustments

My clicks are .1 mils but for me i measured distance from different bullseye's in the target using my reticle. Adjusted for the value that i measured while holding the reticle in the same place and shot. Everything seemed spot on, but thats how i tested my tracking. I also know that the target i was shooting at was made up of 1 inch squares so to double check i counted the squares and roughly converted inches to mils at 100yds. You could do a similar setup by using a yardstick or a targets similar to what i listed, measuring in mils while knowing the distance between points in inches, then convert mils the MOA or inches to MOA and have at it. Thats going a bit far to me but i believe it would work unless i've misunderstood something. Also what Knight said about the similarities between IPHY and MOA, going to be hard to tell the difference at 100. I also agree that holding the rifle steady and being extremely consistent will factor in to distinguishing between MOA and IPHY.

 

[308Shooter1911]

Re: How do I check click adjustments

I would imagine it's MOA and not IPHY since it's what the military uses in some of their sniper systems. IPHY is more for hunting scopes IMO...

 

[gugubica]

Re: How do I check click adjustments

Place a perfectly verticle target at exacly 100 yards. Draw a perfectly plum line between a zero dot and one that is 40 inches above it.

Fire a group at the zero dot. Dail in 40MOA and shoot another group using the same point of aim.

If your second group hits the top dot, you check, if not, start doing math.

The problem is, even if you know what system you have, there is also likely error in your adjustments. Repeat above with different measurements to figure out what the error is and extrapolate it throughout you adjustment range for accurate dope.

 

[Red Ryder]

Re: How do I check click adjustments

Earlier today, before I saw this post, I went out to a 98 yard range and using a target graded in 3/4" grids fired 3 rounds. The first round was my 100 yard zero. Right on. Then I dialed my Mk 4 6.5-20 LRT up to 2 and fired two rounds. Both rounds created a somewhat large one hole and both rounds were 2.5" high at 98 yards. Now I didn't make sure the target was perfectly verticle or the other procedures mentioned by gugubica but I'm thinking this maybe enough to establish that I'm getting more than my money's worth with each click of the turret.

 

[summitsitter]

Re: How do I check click adjustments

Okay here's what I done today. I placed a 36" yardstick at exaclty 100yds from the face of my scope ( measured with a steal tape). I sucured the rifle in the rest using an assorment of stuff ( bungee cords, duck tape, etc). I started at 0" on the yardstick and then cracked on the scope until the crosshairs where sitting perfectly on the 36" mark. I don't this about a dozen times at both. 100yds and 200 yds. At 200 yds it took 67 clicks to reach 36". That converted to MOA should be 35.07". If my math is correct. It took 134 clicks at 100yds. Which comes out to be the same thing. Okay here's where I get confused. So would that make my clicks acutally .2566? per click ( 1.0265) per MOA? If this is correct do I just put that in my adujstment thing on my ballistics calculator (shooter's ballastics).

 

[summitsitter]

Re: How do I check click adjustments

Bump for a checking

 

[Jon A]

Re: How do I check click adjustments

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: summitsitter</div><div class="ubbcode-body">So would that make my clicks acutally .2566? per click ( 1.0265) per MOA? If this is correct do I just put that in my adujstment thing on my ballistics calculator (shooter's ballastics). </div></div>
That's exactly what you should do. Great job.

I'm a strong advocate of EVERYBODY who shoots long range doing this with EVERY scope they use to shoot long range. Most people's first reaction to their actual dopes not matching a ballistics program is to go messing with the bullet's BC--which is the last thing they should do and will cause problems when that incorrect data is extrapolated to different ranges.

Measuring the scope clicks should be the first thing people do.