Short answer; Yes.

Chairgun truly does not care what scope you use. It only cares about what pellet/slug did you use, and what velocity did it leave the bore.

It is a great tool for you to do "what if" scenarios with. What if I use this projectile instead, what if I increase my velocity. What if I decide to shoot at 150 meters/yards... how much hold over, how many foot pounds of force will I have at impact.
 
Whitetail17, take a hard look a strelok pro for around $12 bucks. Every known reticle to man included. Loaded with all the features and will answer the "what if" questions. Get the input right (scope height very critical), a good zero and you are way ahead of the game. Add a range finder to the mix and you should be good to go. Just do it.
 
I also use strelok as my main app for my airgunning. I do still use chairgun often as a quick reference to look things up as far as numbers go. For example when I had been looking for a co2 airgun for a bud of mine that could take squirrels out to 30 yards or so I used chairgun to figure out the FPE potential. I just input the data from the website listing into chairgun. I know that all to often that lower end airguns will give you some crazy nonsense for data as far as FPS and whatnot but it helps.

With that said. Chairgun is a great app and defiantly more user friendly then strelok. My thoughts are to use chairgun as a quick reference tool and strelok for when you want to dial in your airguns. In any case. Both are great apps and handy to have on hand.
 
One of the differences between ChairGun and Strelok, if I understand this correctly, comes into play when you want to use different pellets (also, if you want to use different power settings, if your gun has that feature):

Let’s go through the steps of setting it up, to see where the difference (= the problem) comes in:

ChairGun (Android)
Pellet #1
1. With ChairGun (Android) you zero your scope for one pellet, #1.
2. Reset the scope turrets to zero.
3. Enter the pellet data and present weather conditions into ChairGun.
4. Store your rifle–pellet combination.
5. Let ChairGun calculate a shooting solution for pellet #1 at your target’s distance. 
6. Click the turrets to ChairGun’s number or use ChairGun’s dots of holdover. Shoot.



Pellet #2
1. If you want to use another pellet #2, re-zero the scope to shoot for pellet #2.
2. Write down in a LIST the offset up/down clicks, left/right clicks in comparison to pellet #1.
3. Reset the scope turrets to zero (yeah, many scopes require an that allen wrench).
4. Enter the pellet data and present weather conditions into ChairGun.
5. Store your rifle–pellet combination.
6. Let ChairGun calculate a shooting solution for pellet #2 at your target’s distance.
7. Click the turrets to ChairGun’s number or use ChairGun’s dots of holdover. Shoot.


Now comes the problem when switching between stored pellet-rife combinations:
If you want to go back to pellet #1, or any other pellet you have stored in ChairGun:
1. Find your written LIST of offsets.
2. Reset the scope turrets to zero (allen wrench...).
3. Pull up your stored rifle–pellet combination.
4. Let ChairGun calculate a shooting solution for pellet #1 at your target’s distance.
5. Click the turrets to ChairGun’s number or use ChairGun’s dots of holdover. Shoot.

Note: You could get away without resetting the turrets, doing it the following way:
1. Take ChairGun’s shooting solution of elevation and windage clicks.
2. Add/subtract to that the number of clicks that you have written down in your LIST of offsets.
3. Click the turrets to those new numbers. Shoot.
Complicated? Yes.



____________________________________________________



Strelok Pro (Android)
Pellet #1
1. With Strelok (Android) you zero your scope for your most common pellet, let’s call it the universal pellet. Pellet, #1.
2. Reset the scope turrets to zero.
3. Enter the pellet data and present weather conditions into Strelok.
4. Store your rifle–pellet combination.
5. Let Strelok calculate a shooting solution for pellet #1 at your target’s distance.
6. Click the turrets to Strelok’s number or use Strelok’s dots of holdover. Shoot.



Pellet #2
1. If you want to use another pellet #2, shoot it without adjusting the scope. Measure the offset (“zero offset” up/down, left/right) from the bulls.
2. Enter the pellet #2 data and present weather conditions into Strelok. Enter the zero offset of pellet #2 into Strelok.
3. Store your rifle–pellet combination.
4. Let Strelok calculate a shooting solution for pellet #2 at your target’s distance.
5. Click the turrets to Strelok’s number or use Strelok’s dots of holdover. Shoot.



Now comes the good part of Strelok, when switching between stored pellet-rife combinations:
If you want to go back to pellet #1, or any other pellet you have stored in Strelok:
1. Pull up your stored rifle–pellet combination.
2. Let Strelok calculate a shooting solution for pellet #1 at your target’s distance.
3. Click the turrets to ChairGun’s number or use ChairGun’s dots of holdover. Shoot.
XXX No need for a written LIST of offsets.  XXX
XXX No need for resetting the scope turrets to zero (no allen wrench...). XXX
XXX No need for recalculating the clicks by adding/ subtracting the clicks from some written LIST of offsets. XXX



___________________________________________


What Strelok has – and ChairGun doesn’t

• Strelok Pro and "+" allows you to store up to 10 rifles (or rifle set ups, e.g., with moderator, and without moderator, or with high power, mid power, and low power). And for each of these rifles you can have up to 10 pellets. The free version gives you only 7 rifles with 5 pellets each.

• Strelok Pro allows you to connect to various wind meters and weather meters – wirelessly via bluetooth – and adjusts POI accordingly. So, you look at Strelok and it gives you real-time data for your wind corrections required.

• Strelok Pro allows you to enter the exact weather conditions when zeroing the scope. And when shooting, you enter the current weather and Strelok adjusts your POI accordingly. This is much more accurate.

• If you have certain targets or ranges that you shoot frequently, you can store those in a target list.

• You can set Strelok to accept data of different units (metric, imperial), and you can adjust the unit for each data field.

• It has a very powerful conversion function to convert just about anything you need into different units of measure.


What ChairGun (Android) has – and Strelok doesn’t

• Calculates kinetic energy FPE when entering pellet weight and velocity.

• Graphs to show wind drift, POI, energy, velocity, drop, time, clicks required.

• Comparisons of those data for up to four different pellets, in graphical format or in table format.


 
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Chairgun is worthless. It's wildly off in many cases. For instance, I plugged in a rimfire projectile with the ballistic coefficient obtained from my chronograph, at two known ranges, and then used a 25 yard zero.

Scope height calculation is correct. Chairgun showed a 7 inch drop at 100 yards. Realistically, it's about a 17 inch drop. I have also used it with various airguns with proper inputs. It has failed there as well.


 
I've been a big fan of Chairgun since it first came out and find the data to be very close to reality with pellets. I don't shoot Field Target or benchrest so I can't say it's 'spot on' for those uses at know ranges but for field use and 'what if' questions -- it works great. Since Hawke took ownership they seem to limit the reticle choices to those their scopes use and provide generic options in addtion. They have added many features I never use (yet) but I need to setup some rimfire data now that the ballistic profile allows one to choose between drag options available. I found one post on another forum where several well respected and very smart shooters discussed this aspect (see link below).

link: https://www.tapatalk.com/groups/thegreencrosmanforum/chairgun-ballistics-profiles-t46689.html

data from link:

G1 (black) is the old standard artillery shell shape used for years....
GA (red) is a profile for airgun pellets, and is the default profile for the program.... note they have slightly lower drag than the G1 profile in the subsonic range....
RA4 (purple) is a .22LR bullet, which should be a good starting point for round nosed cast bullets in big-bore airguns....
GL (yellow) is for "blunt nose - exposed lead" bullets, which, with no other information, may be useful for cast bullets with a flat (meplat) nose....
GS (blue) is for spheres (roundball)....
GC (grey) is for cylinders....
Gx (green) is the custom profile, which you can modify yourself.



I have never used Strelok or even seen it in use for that matter but it appears to be good and has many more options regarding a scope reticle choice. I now have a smart phone and based on what I saw in this thread eatlier -- may have to try it out.

There is an old saying about programs that are computer related --- "garbage in = garbage out" and I'm sure that can apply to either of these programs. If your results aren't as expected review and confirm the data input.




 
What ChairGun (Android) has – and Strelok doesn’t

• Calculates kinetic energy FPE when entering pellet weight and velocity.

• Graphs to show wind drift, POI, energy, velocity, drop, time, clicks required.

• Comparisons of those data for up to four different pellets, in graphical format or in table format.

Strelok pro does all that and more with the exception of comparing data between multiple trajectories. You can send trajectory tables by email or text message to yourself so you can compare multiple trajectories. Strelok Pro does so much more than chairgun.
 
What ChairGun (Android) has – and Strelok doesn’t

• Calculates kinetic energy FPE when entering pellet weight and velocity.

• Graphs to show wind drift, POI, energy, velocity, drop, time, clicks required.

• Comparisons of those data for up to four different pellets, in graphical format or in table format.

Strelok pro does all that and more with the exception of comparing data between multiple trajectories. You can send trajectory tables by email or text message to yourself so you can compare multiple trajectories. Strelok Pro does so much more than chairgun.



LDP, I'm hoping really hard that you are right and I'm wrong.

Because I really really want my Strelok Pro (Android) to calculate the kinetic energry (in FPE) when I feed it with the pellet weight and a velocity.

How do I find that function? I have been through all the menus at least twice.... 
 
Maybe its different with android. On my iphone after you have all your data entered you go to the main menu. At the bottom theres two rows of buttons. The one on the far right that looks like an empty calender takes you to your trajectory table. Once you are at the trajectory table open the settings button on the bottom of the screen. In the settings window you can change what data is shown and switch between moa, mrad and inches. Theres a button for turning on bullet speed, energy and flight time. If you turn on bullet energy it will add a column in the trajectory table that shows the energy at any given distance. 

Heres a pic showing the energy column. 

1544815682_16815040445c140442838dd9.69648625_A7EEF22D-FD9F-47F0-B4DC-B13DBCD5B13A.png

 
I see what you mean, LDP, yeah, there is a way to find FPE. Thanks.



However, I constantly play what-if scenarios, where I need to manipulate the three factors:

–pellet weight

–pellet velocity

–kinetic energy



In ChairGun (Android), I open a screen for doing just that. Very convenient, like if I wanted to know the lower weight limit of pellets for a certain xFPE gun, in order to avoid the pellets going supersonic. Or how much power I need to push 25gr pellets at 900fps.

Strelok really needs a few calculation screens added. Also, for instance, a calculation screen how far a pellet will travel before hitting the earth again, and at what angle I can shoot how far, and how much kinetic energy the pellet will have upon impact.
 
Yes chairgun does allow comparative samples easier than strelok. Im guessing since strelok is geared more toward the shooter who is experienced and using firearms they didnt feel the need to have those types of options. I think strelok started with just firearms then started adding airgun support. 

Personally I dont need to compare different pellets at that level. If I did I would be able to look at the velocity and get a really close educated guess on the fpe difference. If you really need to compare then I would use chairgun to do that. I would still use strelok for calculating my holdover/ click adjustments once I settled on the load I wanted to use. Strelok has more depth and will be more accurate as you stretch the distance so I use it for my airguns and firearms. 
 
If you really need to compare pellets I would use chairgun to do that.

I would still use strelok for calculating my holdover/ click adjustments once I settled on the load I wanted to use.

Strelok has more depth and will be more accurate as you stretch the distance so I use it for my airguns and firearms.

LDP,

I fully agree! Strelok rocks.

Just got a bluetooth anemometer for 60$ that connects with Strelok.

I'm looking forward to see how the two operate in tandem. :)
 
If you really need to compare pellets I would use chairgun to do that.

I would still use strelok for calculating my holdover/ click adjustments once I settled on the load I wanted to use.

Strelok has more depth and will be more accurate as you stretch the distance so I use it for my airguns and firearms.

LDP,

I fully agree! Strelok rocks.

Just got a bluetooth anemometer for 60$ that connects with Strelok.

I'm looking forward to see how the two operate in tandem. :)

I use the weatherflow wind meter with mine when I am out shooting ground squirrels, prairie dogs or rock chucks with my firearms. The wind meter just plugs into the phone and syncs with strelok. Strelok takes the reading from the meter and makes all the adjustments I dont have to do anything. I am sure yours will work just as good and you are gonna really like it. I recently upgraded my Iphone to the max xs they dont have the headphone jack anymore like my iphone 6 did so im gonna have to find a bluetooth meter like you have. I never thought of that so thanks for bringing this up. I would have been out in the field getting ready to setup on the ground squirrels and not be able to use my wind meter lol.
 
I got the full WheaterFlow, not just wind, but pressure, temp, all that.

No plug-in needed into the phone.

Now I'm trying to make a weather vane for it.

The vane for the Krestel costs 50 bucks — for a piece of plastic worth 10% of that — and NO, there is no tripod included with that yet (talk about highway robbery... 😫).