Results from using Strelok Pro (Android Ballistics Calculator)

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Gobc

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I've been using Shooter and Strelok on Android and found Shooter to give me crappy results. I also didn't like the clunky interface. I downloaded Strelok Pro for a whole $14. I'm not doing a full review but it has some great features. It can use the temp,pressure and humidity sensors on your phone. It can bluetooth to Krestel devices as well. I don't have one so I couldn't test the feature. It also allows you to use the G7 bullet model instead of limiting you to the G1 model. So how did it do?
Before the I show the screenshots, let me say that these groups suck and i wasn't doing my best shooting. Everyone of my groups today had a "flyer" (or two). So no laughing!

Here are my 109y (100m), getting my zero groups. Note that I adjusted the scope after these groups.



I then dialed in the settings for 300y. And here are my raw 300 yard groups.





My groups are almost right on the bullseye. I did a 200m group as well, but I"m not posting it because its really really pathetic. But take it from me, the elevation of the group is aligned with bullseye. I have to say I"m really impressed with this calculator. I highly recommend it. And having our phone's measure weather conditions is just an awesome feature. How did we ever live without these pocket computers we call smart phones?
 
To be honest you didn't do a very good test.

I'll assume that you have done a tall target test or something similar to prove that your scope is tracking as it should and you have an accurate chronograph.

If your shooting well inside the supersonic range of your caliber then ballistics aren’t all that "picky". At 300 yards its not going to make a big difference between using g1 or g7 ballistic coefficients.

That being said I've used the free Strelok and it works just fine inside supersonic ranges.

I have since upgraded to Byran Litz's program and its been spot on when I can feed it the proper information.
 
Gobc said:
I'm hoping to try shooting farther than 300y. This is why I tested it at the range, to see if it would at least get plausible results here.
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Did you shoot a tall target test? Theres a lot of things you can do before you go out long range shooting that can help you a lot.
 
No I didn't. I'm not sure what a tall target test even is. I can say that I've chronied my velocities and my scope (sightron SIII 10-50x) holds zero and tracks very well.
 
Gobc said:
No I didn't. I'm not sure what a tall target test even is. I can say that I've chronied my velocities and my scope (sightron SIII 10-50x) holds zero and tracks very well.
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The Siii 10-50 has 50 MOA of elevation travel. Half of that is 25. So with a 0 MOA base you should have around 25 MOA of up travel. At 100 yards it works out to roughly 25".

At exactly 100 yards set up a target that is about 3 feet tall. After its stapled to the target holder use a level and draw a plumb line from the top of the paper to the bottom. Draw a level line close to the bottom of the paper to make an aiming point.

Shoot a 3 shot group at the aiming point you made. Dial up 10 MOA and shoot another 3 shot group. Dial up another 10 MOA (total of 20) and shoot another 3 shot group. Dial up 5 more and shoot a 3 shot group.

Your first 3 shot group should be right on your aiming point. Your second group should be 10.47" above your aiming point. Your third group should be 20.94" above your first group.

If its not you will need to figure out what the correction factor is and put that into your ballistic calc. If it takes that input.
 
I was out yesterday using Strelok+ and with a 100yd zero then asking it to calculate for 450yds it was close enough to get me on paper, I dialed up another 1 moa and was pretty much where I needed to be. Was snowing while I was shooting so I'm not sure how much effect that has on things.
I like the program, definitely easy to use and accurate enough. I used the trajectory validation to get what it figures is my real velocity.
 
i found temperature is essencial in those things. I got my 100 meter zero at Borden and it was about -12, last time i shot up to 600 meters it was +15 degrees and there was a difference, especially 500 meters plus in the chart. Its very important to update your condition setting to get your zero conditions and then update the weater everytime you shoot.
 
martinjozwa said:
i found temperature is essencial in those things. I got my 100 meter zero at Borden and it was about -12, last time i shot up to 600 meters it was +15 degrees and there was a difference, especially 500 meters plus in the chart. Its very important to update your condition setting to get your zero conditions and then update the weater everytime you shoot.
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The weather function will correct for altitude density but it will not correct for the temperature sensitivity of your powder.
This is why you need to keep a shooters log book for all your DOPE.
DOPE stands for Data On Previous Engagements.
 
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