Setting up Strelok Pro for FX 30 cal Impact

[ashes5]

Hopefully this will be helpful to some of you and someone with more experience can help me.
I purchased Strelok Pro and the WeatherFlow wind meter.
I zeroed my rifle at 35 yards and it shoots 870 fps using JSB 44.75 Exact. Length of pellet was .375 and I used BC .043. 
Scope height is 2.71. the scope is a Hawke Airmax 30 IR 4-16 x 50 .250 MOA adjustment
I shot all shots at 16x power.

I checked the zero at 35 yards when I first went out. The wind was variable from 3 to 7 mph. about 70 degrees from my back counter clockwise or 20 degrees clockwise from my front.
It was hard to get an exact measurement because the wind was so intermittent. 
At 50 yards I shot about 30 rounds testing the elevation and windage.
The elevation was very close within 1-2 clicks from Apt reading. The Apt showed 1.4 MOA or 5.6 clicks from zero. 
It was hard to tie down the the windage but I would look at the horizontal adjustment shoot and then look back at the adjustment to see if it was still the same. Some shots were close and some were different by 1 or 2 MOA.
I didn't adjust for windage to hit zero but I would aim at center point each time and measure the wind drift with the scope to see if it actually matched up with the Apt reading. It was very close at 50 yards. I would say within 1/2 MOA.

At 100 yards it got a bit harder.
Elevation: the Apt showed 12.23 MOA or 48.9 clicks
actual was 13.25 MOA or 53 clicks from zero for elevation. A difference of about 1 MOA
Windage: was a bit more difficult. The wind where I sat differed quite a bit than what it was out at the target. I setup up a flag out at the target to have something to judge the difference. I was getting a 1- 1.5 MOA difference from actual to Apt readings.

A question for those of you that know this Apt better than me. Where should I adjust to get a closer adjustment for elevation out at 100 yards?
The wind is a tough one because it was so variable.
The wind stopped blowing while I was shooting at 100 yards so I was able to confirm my adjustments for windage and elevation which made me more confident of the data on the Apt. 
Thanks for your input

 

[Ginuwine1969]

I to use Strelok Pro and it is usually pretty close but thats the best i can say about it pretty close because BC is constantly changing. I would recommend you get the numbers spot on at 50 yard. Anything closer if feel is unreliable because the difference between 21-40 yard for me (with a 25 yard zero) is like .25 of an inch so its really difficult to get an exact zero that close for me. But at 50 (46 actually) yards the drop becomes more noticeable. So if you can get it reading perfect (as can be) at 50 yards you should be good to go.

 

[Michael]

Looks like that model is based on 10x mil-dot. Try using 10x magnification and see if you get better results.

Also, correct me if I'm wrong but the scope height should be measured from the center diameter of the barrel to the center diameter of the scope tube. Is that what you used?

I noticed another problem with Strelok Pro. When I enter the wind direction of either 0 or 180 degrees (head wind or tail wind) the calculator does not show a vertical rise or drop. Even with outrageous wind speeds. The wind direction only appears to work on the horizontal axis.

 

[sharroff]

When you are setting up the scope, there is a field for "Ranging Magnification". That needs to be set for where you consistently do your range finding / shooting for non first focal plane scopes if you plan to use their mil dot hold over/under scope picture. The clicks are still on regardless as long as you have your range correct.

 

[X27]

What drag-function are you using there are a bunch to choose from and there is one used for pellets.
GA ← this is the pellet one...


Also can someone tell me what ranging magnification is.. I think it is the magnification where your mil dots are the correct distance to use them to range distance? But how can I tell what this magnification is. Is it always 10x?
I have a utg 3-12 ao swat scope 

 

[Erik]

Also the pellets you use are in the cartriges database inside the app so you don't need to measure them yourself

 

[REDSF65]

Okay you guy's, I when out in the cold and gave it a go.
Setting up 30 Cal FX Impact:
Charged rifle up to 199 bars / 2886.25 PSI.
Regulator was set at 150bars / 2175.57 PSI.
Power Wheel set to Max, for first 15 shots. Then moved it up and down for a bit, settled on #3 setting.
Valve control knob out to line #3.

Average FPS at max was......803. 

Loaded up the Strelok Pro, got to cold to be continued.

Smacked everything, had to dial it back bit.
Shot clear through a cast iron skillet, at 50 yards.

 

[Centercut]

Ranging mag is the mag that your scope is calibrated at for the mil-dot or MOA markings of your reticle. Most scopes its at the highest magnification of the scope. So, for my Vortex 3-15x or my Sightron 4-16x, its 15x or 16x. However, Hawke scopes are usually 10x or 20x. If your Hawke doesn't got to 20x, then the ranging mag is probably 10x. If it goes to 20x or beyond, its probably 20x.
​As far as Strelok Pro, what I recommend is setting the BC to the actual data you get from shooting at your max range. So in my case with a .30 FC Bobcat MK2, it shows a BC of .043 most places you look. However, to get my Bobcat to hit consistently where Strelok Pro predicted, I needed to set my BC at .037. Before I did that it was hitting low at most distances from its zero of 52 yards. After shifting to .037 (from .042), it hits very close to prediction and the holdovers are correct. Using GA drag function.
​For windage, there is a function in Strelok Pro where you can tell the app to add the effects of windage to your overall holdover...

 

[Trailryder42]

"Centercut"
​For windage, there is a function in Strelok Pro where you can tell the app to add the effects of windage to your overall holdover...

It's in Settings, that gear wheel looking icon.

There's also the Trajectory calibration truing function you can use. If you're experience with POI for the holds the app suggests is different with the built in ballistics data for the pellet you've chosen in the apps database, you can have it figure a correction. Put in what your hold actually is for a distance and it will figure new data and ask if you want to use it. Then it will adjust all your holdover/unders for all distances. See if that gets the app suggestions any closer to what you're actually experiencing.