A question I am struggling to answer - SMOA Scope, Rangefinder with MOA solution

My Swaro scope is SMOA and and I have a drop chart tested to be correct at 400 and 600 yards.

I could just range a distance & refer to the drop chart (and may have to) but I have a rangefinder I can put a custom ballistic curve in and it will give clicks in MOA (saving a step). The drop chart and curve line up (via Leica app) on inches of drop for distances... but the rangefinder gives an MOA result for the measured distance that doesn't match the drop chart for that distance (the difference at distance adds up (SMOA vs MOA)).

Does this make sense as its the end of week,.. the daughter is visiting from Auckland and the wife and her have been out shopping today so I have a stress headache too.

How do I make a ballistic curve that I can 'load' into the rangefinder so when it says X clicks for 600 yards it matches my SMOA scope? Can it be done or not? If not I'll just EHr range and refer to a chart on the phone and/or printed and stuck on the stock.

Could you offset the "zero" to make the drops match up?
For example your rifle is zeroed at 100m. But tell your ballistics calculator it's zeroed for say 123m?
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Originally Posted by hunter Al.7mm08

Could you offset the "zero" to make the drops match up?

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Could try that, set the ballistic curve for a 95 yard zero instead of 100yards for example.

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Originally Posted by Tikka7mm08

Could try that, set the ballistic curve for a 95 yard zero instead of 100yards for example.

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Yeah, something like that. Might be enough to make them match?

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Is there an option when setting up the ballistic profile for the rangefinder to give ‘corrected click value’ or ‘correction factor’ or something similar? If so, does setting that to around .955 level things out?

And that is my issue with swaro. Non calibrated adjustments. Had the same issue with one myself.
The logical option is sell it and buy a Nightforce or something reliable and repeatable.
Or.... get someone to print out a sticker or new dial that calibrate it. A complete f around but may work.

Not in the Leica app.

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Originally Posted by Gkp

And that is my issue with swaro. Non calibrated adjustments. Had the same issue with one myself.
The logical option is sell it and buy a Nightforce or something reliable and repeatable.
Or.... get someone to print out a sticker or new dial that calibrate it. A complete f around but may work.

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I’ve got a custom turret in SMOA, should get a calibrated distance one I guess.

Swaros don’t dial true moa (1.05in) or Smoa (1.00 in) but somewhere between 0.95 - 0.97 in. I have read several sources stating 0.95in per moa at 100yds. On Swaros I owned and done my own calibration the results come out in the 0.95 - 0.97, mostly 0.97. The difference between smoa, which you can get from your RF binos and your scope dialing 0.97 is minimal at the ranges you are talking. Say 600 yd with a decent bc and muzzle velocity you are going to be around 10moa dial up. The difference to correct for Swaro moa at 0.97 is +1 clk. 10/0.97 = 10.3. If it’s dialing 0.95 the it’s +2 clx, 10/0.95 = 10.5. You’ll find the +1 or +2clx added to your smoa read out from RF holds true for 400 all the way out to 800+ yards. It’s a bit crude but you’ll be within an inch of the precise POA needed, & you can’t dial “part clx” on any scope I know of.

Work out your maximum range and acceptable error.
True your muzzle velocity on the rangefinder so the drop matches at maximum range.
Compare your results at varying distances to check the error is acceptable. It should be reasonable up to maximum range, but quickly fall apart beyond that.

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Originally Posted by chainsaw

Swaros don’t dial true moa (1.05in) or Smoa (1.00 in) but somewhere between 0.95 - 0.97 in. I have read several sources stating 0.95in per moa at 100yds. On Swaros I owned and done my own calibration the results come out in the 0.95 - 0.97, mostly 0.97. The difference between smoa, which you can get from your RF binos and your scope dialing 0.97 is minimal at the ranges you are talking. Say 600 yd with a decent bc and muzzle velocity you are going to be around 10moa dial up. The difference to correct for Swaro moa at 0.97 is +1 clk. 10/0.97 = 10.3. If it’s dialing 0.95 the it’s +2 clx, 10/0.95 = 10.5. You’ll find the +1 or +2clx added to your smoa read out from RF holds true for 400 all the way out to 800+ yards. It’s a bit crude but you’ll be within an inch of the precise POA needed, & you can’t dial “part clx” on any scope I know of.

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I was thinking this overnight - it is basically a click or two out past 400... at 800y the RF says 16 MOA and the dropchart says 16.39 SMOA. Works out to 4" difference. So adding a click on the RF (which only gives a whole number adjustment) puts me pretty close. The RF rounds up or down either side of .5 I guess so at 720y SMOA is 13.86 and the RF is 14. So 1 click will mean dialling 14 SMOA, which won't make any relevant difference.

PS - I'm not good at division by 4 to use the click value :P