Ballistic calculator for Android phones

Tikkat3

Hey all,

Found this calculator a good while back and it seems to be one of the better offerings for Android phones:

Strelok Ballistic Calculator

Lots of nice features, with new reticules being added all the time in updates.

Anyway I just thought I would post it for anyone on the look out for a ballistics calculator.

gunhappy_ie

Cool .... il be gettin that....

Tackleberrywho

Tikkat3 wrote: »

Hey all,

Found this calculator a good while back and it seems to be one of the better offerings for Android phones:

Strelok Ballistic Calculator

Lots of nice features, with new reticules being added all the time in updates.

Anyway I just thought I would post it for anyone on the look out for a ballistics calculator.

Do you know does it work on a Nokia?

Merch

does that work with a range of cartridge sizes?

session savage

Yeah I paid for the shooter ballistic calculator but find it much too in depth for my needs. It needs humidity, temp, air pressure, etc before it will calculate. Fair enough it gives you all the info you could want but its too fussy for me. The strelok one is bang on and its results match my Hawke ballistic calculator on the laptop so they cant both be wrong

and its free.. sweet!

rowa

Tackleberrywho wrote: »

Do you know does it work on a Nokia?

it works on my n95 .

Tikkat3

Tackleberrywho wrote: »

Do you know does it work on a Nokia?

The developer has a version for Nokias running symbian.

Here you go: NOKIA

session savage

There is only one thing about the strelok think i was never sure of.... "on how many percent bullet speed will change at change temperature on 15 degrees"...??
Any ideas what thats meant to mean. I just left it on the default setting of 2.5 but would love to know what its about.

Tackleberrywho

session savage wrote: »

There is only one thing about the strelok think i was never sure of.... "on how many percent bullet speed will change at change temperature on 15 degrees"...??
Any ideas what thats meant to mean. I just left it on the default setting of 2.5 but would love to know what its about.

Air Temp dry air is thin, wet air is thick

However atmospheric pressure is proportional to this so it's not a critical input.

clivej

I have just installed the iPhone app for this calulator. go to the app store and search for "iStrelok"

Once the rifles zero, MV, and BC are entered all you have to enter is the target distance and it gives you the MOA and amount of clicks to come up/down from your set zero or a reticle view.

I have to see if it gives the same values as my present drop chart that I use from www.biggameinfo.com/BalCalc.aspx

There is a slight difference in returned values. 1 click or 1" @500y

With a 308 155gr bullet, BC=.435, zero=150y, scope height =1.5", MOA click value=1/4", MV=2800.


Now to realy make sure what your actual drop is, is to shoot at a 500y target and messure the drop. Then if it is the same your good to go and the balistics calulator is giving you the correct reading.
But if it's out you have to alter the BC value, just a little, until you get the same reading as your drop @500y. This should be checked at a couple of distances and the drops noted down.


You should not trust the readings from Balistic calulators and always check the output values with the real bullet drop out on the range using results from shooting paper.

Just using it a litle more. Theres a nice option of selecting the reticle as the view output and it will give you the target at the say 500y distance with a reticle overlay. I chose a mildot reticle and added 8MPH of wind. The result was the midots with the yardage drop markings and my the 8MPH target offset by 1 mildot. I'll try and get photo's of iPhones screen grabs later and put them up.

A good little balistics calulator utility and it's free.

Thanks TikkaT3 for the link

Tackleberrywho

clivej wrote: »

I have just installed the iPhone app for this calulator. go to the app store and search for "iStrelok"


Why do you 150 yard zero, and not 200 yard zero?

clivej

Tack can you amend your post above to exclude the quote from me as I changed the text 'cos I didn't have the same default settings in both programs and the results are as near as to make no difference.

You take it I have my 308 zeroed at 150y just 'cos I put that data into both calulators. Not so. My zero is 185y 'cos thats where I left it at after coming from the range. 1 1/2" high @100m.

Why 185 why NOT? That will give me a PBR out to 230y. But now I have the iStrelok program I'll be dropping those deer out to 1000m real easy just dail in the drop. :eek::eek::eek::eek: and :eek:

Tackleberrywho

clivej wrote: »

Tack can you amend your post above to exclude the quote from me as I changed the text 'cos I didn't have the same default settings in both programs and the results are as near as to make no difference.

You take it I have my 308 zeroed at 150y just 'cos I put that data into both calulators. Not so. My zero is 185y 'cos thats where I left it at after coming from the range. 1 1/2" high @100m.

Why 185 why NOT? That will give me a PBR out to 230y. But now I have the iStrelok program I'll be dropping those deer out to 1000m real easy just dail in the drop. :eek::eek::eek::eek: and :eek:

Are you not over complicating things with 185 y zero

If you have 1/4" clicks does it not work better with even numbers?
So if you forgot the calc you would still have a good idea

clivej

Tackleberrywho wrote: »

Are you not over complicating things with 185 y zero

If you have 1/4" clicks does it not work better with even numbers?
So if you forgot the calc you would still have a good idea

Not realy if you enter your zero into any cal. program it will still give you MOA or click values the same. In fact this is the only cal. program I have seen that will say come up 6.8 clicks which of course you can't do, so you come up 7 clicks.

It's the same as ranging a target at 175y and your cal. program says give it 5 clicks up the naxt target is 193y and now you come up 7 clicks. Your zero is only relative to a target at your zero distance.

patsat

Tackleberrywho wrote: »

Are you not over complicating things with 185 y zero

If you have 1/4" clicks does it not work better with even numbers?
So if you forgot the calc you would still have a good idea

I would say he is making things alot more simple!

If you have a look for an article in the chuckhawks website he explains the most effective zero distance for different calibres, I'd post a link except I'm not at a computer!

I wrote out a post there to try and explain but it was confusing so I deleted it! I'll try find the link!

patsat

There ya go!

http://www.chuckhawks.com/rifle_trajectory_table.htm

clivej

patsat wrote: »

I would say he is making things alot more simple!

If you have a look for an article in the chuckhawks website he explains the most effective zero distance for different calibres, I'd post a link except I'm not at a computer!

I wrote out a post there to try and explain but it was confusing so I deleted it! I'll try find the link!

patsat wrote: »

There ya go!

http://www.chuckhawks.com/rifle_trajectory_table.htm

I just hate it when I'm right, correct, bang on, not wrong :rolleyes:

:P:P "I was wrong once but it was a mistake" :P:P

Tackleberrywho

patsat wrote: »

I would say he is making things alot more simple!

If you have a look for an article in the chuckhawks website he explains the most effective zero distance for different calibres, I'd post a link except I'm not at a computer!???

I wrote out a post there to try and explain but it was confusing so I deleted it! I'll try find the link!

Einstein said, If you can't explain it simply, then you don't fully understand it!

The info Chuck has is (although detailed) old and out dated.

Hornady .308 SST Superperformance is touching 3000fps

I was asking clive a question, as he is using a Zero that is non traditional.
Most use 200 yard zero (or zero high @ 100)

.308 Win. (150 BT at 2800) .435 +2.7" +1.7" 3"@135 275

Most Folk zero on a 100 yard range, but zero high.(or Zero 200y)
Irrespective of calibre in centrefire, they always use a 200 yard zero.

No Ranges I know of in this countryhave a 185 yard Centrefire range, so therefore I was wondering why the 185 yard zero?

I can understand why CLIVE did, as he explained it to me.
I asked him a simple question, and he gave me a simple answer.....

Tackleberrywho

Tikkat3 wrote: »

Hey all,

Found this calculator a good while back and it seems to be one of the better offerings for Android phones:

Strelok Ballistic Calculator

Lots of nice features, with new reticules being added all the time in updates.

Anyway I just thought I would post it for anyone on the look out for a ballistics calculator.

I've a Nokia X6, and It gives a application manager error when I try and install post downloading.

Anyone else have this and discovered a work around?

clivej

Tackleberrywho wrote: »

Einstein said, If you can't explain it simply, then you don't fully understand it!

The info Chuck has is (although detailed) old and out dated.

Hornady .308 SST Superperformance is touching 3000fps

I was asking clive a question, as he is using a Zero that is non traditional.
Most use 200 yard zero (or zero high @ 100)

.308 Win. (150 BT at 2800) .435 +2.7" +1.7" 3"@135 275

Most Folk zero on a 100 yard range, but zero high.(or Zero 200y)
Irrespective of calibre in centrefire, they always use a 200 yard zero.

No Ranges I know of in this countryhave a 185 yard Centrefire range, so therefore I was wondering why the 185 yard zero?

I can understand why CLIVE did, as he explained it to me.
I asked him a simple question, and he gave me a simple answer.....

So the real reason is:
I put it 1 1/2" high at 100m and from the balistics calculator that was working out @185y ish so I used 185y in my calculator to get the drop at the different ranges. Easy peasy......................

poulo6.5

I have had it for a while now and it works fine for me. It also works out angle to target. And you can choose to add weather info or not.
I ranged a sod of turf on a wall at 770y and put the info into the calculator for my .308.
MV. 2925
BC. .415.
Distance 770y
Wind @ 6 o'clock @ 5 mph
Angle 0 deg

My answer was 20.73 moa

I did that to the nearest click = 20.75 moa

I hit the target.


It works.

clivej

Opening screen and screen after tapping the calculate button. It saves the last load settings.
Load data used is
308 155gr bullet, BC=.435, zero=150y, scope height =1.5", MOA click value=1/4", MV=2800. And the target is loaded in @500y.





From the home screen tap the buttons to open the different data input screens.





After tapping the Calculate button or Reticle button either of these two output screens will show the results.
I have shown the Reticle output screen bigger as it shows the mildot reticel and the different elevation and windage text that is tagged to the mildot.
And the target at the 500y range as a yellow round circle. If you had input windage as well the yellow target circle will be offset in the reticle screen as well.
So if we look at the reticle output screen it shows the windage to allow for ie if there's 8MPH wind @right angle offset by the using the first mildot. 17MPH use the second mildot.
The first elevation mildot is for a target at 300y use the second mildot if the target is at 416y.

Tackleberrywho

I still can't get it on my Nokia, I might need a software update to make it compatible.

My phone does not auto update so it has to be done manually.

clivej

Tackleberrywho wrote: »

I still can't get it on my Nokia, I might need a software update to make it compatible.

My phone does not auto update so it has to be done manually.

It must be a Remington Nokia phone.:p:p

Tackleberrywho

clivej wrote: »

It must be a Remington Nokia phone.:p:p

Yes,
Nokia's have really gone down hill since they Left Sako group.

However, it still makes calls, unlike an Ipod 4 :p:p:p:p

Or does not drop calls like an ipod 3

I have it on manual update as I only update it via wiifi, as I save a fortune that way

clivej

Tackleberrywho wrote: »

Yes,
Nokia's have really gone down hill since they Left Sako group.

However, it still makes calls, unlike an Ipod 4 :p:p:p:p

Or does not drop calls like an ipod 3

I have it on manual update as I only update it via wiifi, as I save a fortune that way

Well your correct on the fact that my iPod 4, 3, 2.......... drops calls

BUT my iPhone works very well.

jap gt

i have the same calculator on my ipod touch as clive has, its simple to use and seems to be fairly accurate once the info is entered correctly

Tackleberrywho

I just got it to work.

Installation manager had to accept non Trusted sites for it to work.

Happy Days.

On my Nokia X6

Tackleberrywho

Tikkat3 wrote: »

Hey all,

Found this calculator a good while back and it seems to be one of the better offerings for Android phones:

Strelok Ballistic Calculator

Lots of nice features, with new reticules being added all the time in updates.

Anyway I just thought I would post it for anyone on the look out for a ballistics calculator.

I just got it and it's class, as it works on my mobile phone Nokia X6.

I hope she is accurate.
53.3 clicks for a 600 yard Bunny!
Assuming there is no wind:eek:

clivej

Tackleberrywho wrote: »

I just got it and it's class, as it works on my mobile phone Nokia X6.

I hope she is accurate.
53.3 clicks for a 600 yard Bunny!
Assuming there is no wind:eek:

wind meter at dealextream $15 and load the MPH into the BalCal and off you go.

session savage

Heres a list of ballistic coefficients if its any use to ye.

Tikkat3

Tackleberrywho wrote: »

I just got it and it's class, as it works on my mobile phone Nokia X6.

I hope she is accurate.
53.3 clicks for a 600 yard Bunny!
Assuming there is no wind:eek:

Glad you got it working Tac. Pretty sweet calculator for free and best of all, it works

Tackleberrywho

Tikkat3 wrote: »

Glad you got it working Tac. Pretty sweet calculator for free and best of all, it works

I put in 350 yards today, gave the ammo I use, BC and my NPR-2 reticle.
and it showed my reticle exactly how I would use it to shoot 350!

I need to figure out what degrees the wind is, and wind speed to get a reading for windage @350+ yards

But it takes a good it of the guesswork out

clivej

Tackleberrywho wrote: »

I put in 350 yards today, gave the ammo I use, BC and my NPR-2 reticle.
and it showed my reticle exactly how I would use it to shoot 350!

I need to figure out what degrees the wind is, and wind speed to get a reading for windage @350+ yards

But it takes a good it of the guesswork out

dealextreme.com free postage

$32




$36

Tackleberrywho

Do them wind meters read what direction wind is blowing though?

For the program to be accurate I have to input what the wind angle is at

If teh wind for example is blowing left to right the bullet will move 4.5"

However
If teh wind is blowing from 2 o'clock to 7 o'clock the bullet may only move 2" etc

So it would seem that the wind direction is equally as important as speed

poulo6.5

Shurly you can figure out the direction tack.

I don't know how the app works on your phone but on my iPhone. When you touch the screen where it says wind direction, degrees. A clock with 12, 3, 6 & 9 on it pops up and an arrow to indicate direction. The arrow can be orientated to show direction of the wind by dragging it with your finger.
So what to do.

Stand facing the direction you are shooting and with the app on point the phone in that direction then touch the screen and drag the arrow in the direction of the wind. Job done.
For example.
Shooting 500.
Wind. 23 mph
Direction. 5 o'clock.

MOA. Up. 9.36. (Click to either 9.25 or 9.5)

MOA. Wind. 5.05. ( click to 5.)

Tackleberrywho

poulo6.5 wrote: »

Shurly you can figure out the direction tack.

I don't know how the app works on your phone but on my iPhone. When you touch the screen where it says wind direction, degrees. A clock with 12, 3, 6 & 9 on it pops up and an arrow to indicate direction. The arrow can be orientated to show direction of the wind by dragging it with your finger.
So what to do.

Stand facing the direction you are shooting and with the app on point the phone in that direction then touch the screen and drag the arrow in the direction of the wind. Job done.
For example.
Shooting 500.
Wind. 23 mph
Direction. 5 o'clock.

MOA. Up. 9.36. (Click to either 9.25 or 9.5)

MOA. Wind. 5.05. ( click to 5.)

No wind indication arrows, Just degrees, 90 degrees right, 180 left etc

Very hard to be precise without knowing wind direction.

poulo6.5

Tackleberrywho wrote: »

No wind indication arrows, Just degrees, 90 degrees right, 180 left etc

Very hard to be precise without knowing wind direction.

Still laughing at my IPhone tack.

You can still do it. Do you have the option to enter the wind in degrees. 30 degrees for every hour.
Starting at 12 = 0. 1= 30. 2= 60. And so on.
Same thing for left side. 11 = 30. 10=60. And so on till you get to 6= 180.

If you want to be more precise allow 15deg for every 1/2 hour.

Tackleberrywho

poulo6.5 wrote: »

Still laughing at my IPhone tack.

You can still do it. Do you have the option to enter the wind in degrees. 30 degrees for every hour.
Starting at 12 = 0. 1= 30. 2= 60. And so on.
Same thing for left side. 11 = 30. 10=60. And so on till you get to 6= 180.

If you want to be more precise allow 15deg for every 1/2 hour.

But how do you accurately tell the Wind direction
Looking at leaves on trees only gives a rough indication.
And some of my permissions has no trees or ditches :eek:

poulo6.5

Tackleberrywho wrote: »

But how do you accurately tell the Wind direction
Looking at leaves on trees only gives a rough indication.
And some of my permissions has no trees or ditches :eek:

oh sorry i miss understood you there.
there are many ways.
one is to stand in the direction you are shooting and imagine you are the center of the clock.
with some grass or something light hold it up and drop it.
the wind will blow it in the direction across you.

ie if it blows across you to 3 o'clock then 90deg from left to right

if it blows to 11 o'clock then its 30 deg from right to left

easy. some people use smoke if they smoke same idea.

but surely you can feel the direction of the wind on your face.

anyway. put the deg into your calculator along with the speed and the app will work out how the wind will affect the bullet as weather it is full value like at 90deg or 3 o'clock.
or less value depending

speed is something i cant gauge but i try to guess from experience, a wind speed reader like the one clive put up is what you need for accurate reading of speed.

some of the more expensive ones will give altitude and atmospheric pressure and humidity which also can be entered into the app if you want;)

Tackleberrywho

poulo6.5 wrote: »

oh sorry i miss understood you there.
there are many ways.
one is to stand in the direction you are shooting and imagine you are the center of the clock.
with some grass or something light hold it up and drop it.
the wind will blow it in the direction across you.

ie if it blows across you to 3 o'clock then 90deg from left to right

if it blows to 11 o'clock then its 30 deg from right to left

easy. some people use smoke if they smoke same idea.

but surely you can feel the direction of the wind on your face.

anyway. put the deg into your calculator along with the speed and the app will work out how the wind will affect the bullet as weather it is full value like at 90deg or 3 o'clock.
or less value depending

speed is something i cant gauge but i try to guess from experience, a wind speed reader like the one clive put up is what you need for accurate reading of speed.

some of the more expensive ones will give altitude and atmospheric pressure and humidity which also can be entered into the app if you want;)

Thats all well and good for short range.
I have barometric Pressure on the watch, along with Air temp and altitude above sea level.
Tissot Swiss

I want it to be as accurate as possible so it takes out the guesswork

clivej

Tack it's looking like the auld story "When it's got for nothing the value put on it is nothing" It's a great FREE program.

Did you try tapping the small '>' in the blue circle, in front of the wind MPHinput box, to go to the wind direction compass sreen?
There is another graphic input for the slope angle as well.
But these may only work on a touch screen phone.


To get the real wind direction in the field try turning round until the wind is in your face. It's most lightly to be coming from that direction :rolleyes:

session savage

Tack there are other more in depth calculators out there. I use an android phone so on that platform there is one called Shooter and on the Iphone there is one calles Isnipe. Dont know how good isnipe is cause I have only seen it but you have to buy both of those.
Might be worth a look for you.