I finally have her dialed in over the last couple days. The Athlon turret is dialed in from 25 to 170 yards. Very happy camper here 
The target picture is 3 in a row at 132 yards 
The target picture is 3 in a row at 132 yards I am finally happy! .25 Mark II setup
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I'm shooting the 26.2 grain slug from NSA. 130 bar on the reg. 925 fps. I am also running an external plenum from Vlad. Very happy with the groups also. I also have a power plenum on order from FX so switching out the barrels to a .35 should be a breeze.
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I have Strelok Pro and I have, I think, entered all the information correctly and my numbers don't quite match what Strelok says. Is there a way to fine tune Streloks numbers to match mine more closely? That way I could shoot all the way out to 200 and 300 yards with me having to walk my fat ass out there to the targets. LOL
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there are a few ways but it would tweak with BC number first. BC changes with speed so see if you can get better BC number at your speed, there are YouTube videos on how to do that.
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That's awesome! Now, is that a group of three or the traditional five shot group? Either way still awesome.
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My SUPERIOR liner is to show up tomorrow if I can do that well at 100 I’ll be over da moon. Assuming it’s repeatable . Which seems to be my struggle. I can get a good group maybe one in ten I keep trying
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@triggertreat- I had about 10 targets out and would spread them out at 5 yard increments. I moved the 3 different times, so essentially 30 targets out. I just ran 3 shots at each target (distance) towards the end. So..... just 3 shots
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Here is a post I made regarding set up in Chairgun which may also help dial in Strelok
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There are some tricks to making Chairgun work better than just using a measured scope height and the listed BC. Start with the listed BC and weight for your projectile either in Chairgun or from the web and the muzzle velocity and enter a good estimate of your scope height.
Zero the scope at the first zero of 20 yards which is a range where minimal drop will have occurred.
Zero the scope at 20 yards and enter that as the input to chairgun
Take note of the elevation setting on the turret.
Enter 10 yards as the zero in Chairgun. Read the chart as to what it says the clicks will be.
Zero at 10 yards (hopefully your scope can come up to this) and compare on the chart the number of clicks that it told you to use, and the number of clicks that you actually used. 15 yards could work but wouldn't have as much resolution as at 10 yards. 12 1/4 moa clicks for 15 yards versus 45 clicks for example.
Adjust the value of scope height in Chairgun until the chart matches the actual value of clicks that you found. This is what Chairgun thinks your scope height is. I have found that this might be quite a bit different than what you can measure for some reason.
Now to get the BC set as best: Stretch out the range as far as you might want to shoot/ have room for/ can still get a reasonable group, in 5 yard increments. 50-60 yards at least. Compare the actual clicks to what Chairgun predicted as the difference from 20 yards and adjust the BC entry until they match. This is essentially the same as using the POI drop calculator for BC from the toolbox.
When you are done with these calibration steps you can then calculate the zero that you may want according to Chairgun and the fly through of the point of impact and your desired kill zone tolerance using the "optimum zero range" button under the toolbox tab.
I usually set a .5" kill zone and then remember I am 1/4" low at 13 yards, 1/4" high at 35, and 1/4" low at 40 for example with my Mrod .177 with it's low scope height so that I don't have to click within those ranges. If you use a zero stop and never want to hold or click "under", set the kill zone to 0.01" and the near and far zero will be the same with no point of impact above..
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Since you are trying to get your scope tape accurate out past 100 yards you may need to measure the drop difference between something farther like from 75 yards to 150 to see how much different the bc is as compared to between 30 and 75.
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Here is my strelok data. But for me to hit bullseye at 132 yards I had my scope turret up 68 clicks.
Is there a way to figure out my corrected BC from this data?
Is there a way to figure out my corrected BC from this data?
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If the zero that you entered as the baseline (pre 68 clicks) was the second zero or single zero, or even farther the better, to minimize the input of scope height,
and you are fairly certain of the muzzle velocity,
and have a fairly good value for the scope height,
You can just start playing with the value that you enter in Strelok for bc until it predicts 68 clicks and use that. Which should be closer to correct for all other calculations as well.
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I'm not sure how you determine the gyro stability value to enter for spin drift calculations but this could be a good guess as to why Strelok is recommending 2 clicks left.
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Fun fact: Matt Dubber tells us that spin drift is usually opposite for pellets as it is for slugs and bullets due to pellets having the CG in front of the CoP..
and you are fairly certain of the muzzle velocity,
and have a fairly good value for the scope height,
You can just start playing with the value that you enter in Strelok for bc until it predicts 68 clicks and use that. Which should be closer to correct for all other calculations as well.
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I'm not sure how you determine the gyro stability value to enter for spin drift calculations but this could be a good guess as to why Strelok is recommending 2 clicks left.
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Fun fact: Matt Dubber tells us that spin drift is usually opposite for pellets as it is for slugs and bullets due to pellets having the CG in front of the CoP..
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