Chairgun vs ScopeKnob vs actual

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LonnySC

Member
May 31, 2018
7
1
South Carolina, United States
I have been busy making up a bunch of AZ style scope knobs and printing out elevation turret tapes. The ScopeKnob software is fantastic for this task. They have been somewhat usable but decided to really dial them in and that is where my problem lies. Can't seem to get the clicks / distance to line up between the software and actual. Have accurately measured scope height using the end of barrel method, rechecked velocity over the chrono, etc. One scope / gun combination actually came close between Chairgun and ScopeKnob and Scopeknob BC and scope height were pretty close to actual. The rest are way off. Most are using 28 yards for zero, and 11 and 54 yards are the near and far for click count. 

The largest discrepancies seems to be with the near yardage (11 yards) actual click count to what the software says it should be for given scope height.

Also, once the range starts getting beyond 50 yards the differences between Chairgun and ScopeKnob are really significant.

Any thoughts or suggestions on how to get an accurate scope elevation tape without manually shooting all the distances and then manually inputting data into ScopeKnob.

Appreciate any help you can offer.

Lonny
 
Not to change the subject, but, my ChairGun pro tape length does not match turret diameter after print, to short. I can’t find out where the error is. I did the math and came up with the ratio needed to correct the printing error. Checked the printer profile and can’t see anything causing the problem. Can anyone help or suggest places to look?
 
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The largest discrepancies seems to be with the near yardage (11 yards) actual click count to what the software says it should be for given scope height.
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Click to expand...

Programs typically use target distances with respect to the muzzle. But required clicks should be based on the distance from the scope. If the program does not take that into account, that alone will cause a noticeable discrepancy for closer targets. The muzzle might be 10yds from the target, while the scope might be 10.5+yds from the target. That's about a 5% error even with all other input being correct.
 
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Not to change the subject, but, my ChairGun pro tape length does not match turret diameter after print, to short. I can’t find out where the error is. I did the math and came up with the ratio needed to correct the printing error. Checked the printer profile and can’t see anything causing the problem. Can anyone help or suggest places to look?
Click to expand...

It could be something as simple as the printer DPI not matching what the Chairgun output format is.

If Chairgun has the option to print/save to a PDF format, "print" the tape to a .PDF file, and then print the .PDF file.
 
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