Range Report Introducing "Shooter", ballistics for Android!

#352
Re: Introducing "Shooter", ballistics for Android!

Sean, I was out at TVP today and used shooter to help with my hits and it worked great when the wind didn't shaft me, so THANKS!

I was using it one the fly to calculate wind corrections and a question came to mind..........

When a cross wind is acting on the bullets traj, does the wind not have a negative effect on elevation? If I enter in a calculation for 1000 and record it, then add a 10 mph op degree cross wind, the elevation does not change. I believe it actually does, since some of the energy is being scrubbed off to move it off its path. I think it would also affect the bullets RPM.

With shooter allowing you to change the wind value on the calculation output screen, and if the calculation could be added to show that correlation, I think that would be excellent data to have.

Jim
 
#354
Re: Introducing "Shooter", ballistics for Android!

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Goin'Hot</div><div class="ubbcode-body">When a cross wind is acting on the bullets traj, does the wind not have a negative effect on elevation?</div></div>

Why would it in a true horizontal cross-wind? This isn't a wing and has no ability for vertical lift. Now if the wind was an updraft or downdraft, it would surely have an effect on elevation. The problem is that most wind follows the landscape which is typically horizontal. Reading vertical wind is extremely difficult to gauge even in hilly situations and should be something that adjusts your holds for drop when drafts are predictable.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Goin'Hot</div><div class="ubbcode-body"> If I enter in a calculation for 1000 and record it, then add a 10 mph op degree cross wind, the elevation does not change. I believe it actually does, since some of the energy is being scrubbed off to move it off its path. I think it would also affect the bullets RPM.</div></div>

The calculation is using a 90 degree horizontal crosswind. Perpendicular wind will not have an effect on elevation or RPM.
 
#355
Re: Introducing "Shooter", ballistics for Android!

GoinHot's question got me thinking about something I have not spent any real time considering before the question.

In a crosswind we are aiming into the wind to make the shot arrive on-target. Of course it is proportional to the angle and speed of the wind, the distance, the BC, and the velocity.

For the sake of this discussion lets say its coming from 3-o-clock(90 degrees). The fact that we are aiming into the wind means the bullet is traveling in an arc. We aim right and the wind drives it left......effectively increasing the distance the bullet must travel. Maybe the path has not increased greatly....but it is a longer path than the same shot in calm conditions.

But then....I am no ballistician.
laugh.gif
 
#356
Re: Introducing "Shooter", ballistics for Android!

Rafael,

Good point. The true bullet path is indeed increased, albeit to a level that is rather insignificant when it comes to calculating drop.

That said, add a 50mph wind and you begin to see this effect downrange for long range shots.
 
#357
Re: Introducing "Shooter", ballistics for Android!

FYI:
I went ahead and ran QuickTarget with 55FMJ loads for my AR-15.
Out to 1500 yards....like I would ever
laugh.gif
........
When switching between a 1 mph crosswind and a 111 mph the suggested elevation settings remain the same.

Quickload/QuickTarget does not alter adjustment data for crosswinds.
 
#358
Re: Introducing "Shooter", ballistics for Android!

Try JBM. It will take this into account for drops if you run it through. For example, a 1700 yard shot with a 100mph crosswind will effect the drop output.
 
#360
#361
Re: Introducing "Shooter", ballistics for Android!

As a matter of fact I did.....
Thank you for the links, Lindy.

Still.......that one ten-thousandth of a second in TOF deviation in a wind switch form 10@90 to 10@270 has me greatly concerned.
smile.gif


Okay....I am convinced it is nothing of concern.
 
#363
Re: Introducing "Shooter", ballistics for Android!

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Hazardus</div><div class="ubbcode-body">Try JBM. It will take this into account for drops if you run it through. For example, a 1700 yard shot with a 100mph crosswind will effect the drop output. </div></div>

.....and if someone can make a 1700 yard shot in a 100MPH crosswind....I will just go ahead and surrender. There is no escape.
smile.gif
 
#364
Re: Introducing "Shooter", ballistics for Android!

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Lindy</div><div class="ubbcode-body">Well, I just hope that you read and understood all 11 pages of the discussion on benchrest.com. There will be a quiz...
laugh.gif

</div></div>

I never EVER said I read and understood it all.
If I did that I would be in a Coma for a week.
I found it a bit frustrating just pulling out that little nugget I referenced.
laugh.gif
 
#365
Re: Introducing "Shooter", ballistics for Android!

Sean,

we hit a snag this weekend,

I was out running the progam, shooting with a friend out to about 900 meters,

it was a pratice up for a upcoming event,

Alright here is the deal,

I shoot a mil based S&B PMII, no issues, I just punched in temp, alt and pressure,

had the rest sorted before,

got a range card and away it was, spot on.

However my pal has a scope with 1/4 moa adjust,

so we had to calc for each range, mostly cause he is no got a algebra, to take each whole MOA x4 that is.

this is were the issue appeared.

if by missfortune I hit the compute button first once and then again,

we got some really off figures, to quick fix this I had the mode changed in to HUD mode,

however I would/hopes that you have an answer to be about what I am doing and how it works,

tvice I got numbers that were to low and the shots landed to short,

a bit embarrasing for me, in charge of the bal generator.

Sorry for the silly assed questions.

Best regards Chris
 
#366
Re: Introducing "Shooter", ballistics for Android!

How did you determine the pressure?

If you entered the station pressure, i.e., the actual atmospheric pressure at your location, <span style="font-style: italic">and</span> also entered the altitude, the program may have computed for an altitude higher than you actually were - which would have resulted in calculations which were short.

See:

Barometric Pressure and Ballistic Software
 
#367
Re: Introducing "Shooter", ballistics for Android!

Lindy,

I used the pressure presented by the weather station nearby,

they are online and so I had it in my Android.


Thank you for educating me about how to adress the ideas of altitude/pressure,

however this time that was not the issue,

unless the progam sort of wished to give me two solutions for the same range.

I think I was unclear in my text above,

ok no butterfingers, punched compute once,

got a god result,

if I by mistake dubbeltapped it,

we got a second result that yielded a lower value solution,

once I had doubbletapped by mistake the rest of the results were off, I had to back out of the program and restart it.

Hmm your "idea" of how this has came to bee sure has some reason to it,

so what can be done,

leave out butterfingers,

leave out one of the values?

i´ll look in to it, after work today.

Best regards Chris
 
#368
Re: Introducing "Shooter", ballistics for Android!

Swedish guy,

I'm assuming you're using all metric inputs? Can you tell me what values you're using for the rifle and ammo profile as well as the data your inputting for the shot so I can try to reproduce this?
 
#369
Re: Introducing "Shooter", ballistics for Android!

Swedish guy,

I was able to reproduce the problem and I've identified the issue and uploaded a fix for the free version only. The paid version will be fixed soon, I just can't update it right now due to some other changes that are in testing for this build.
 
#374
Re: Introducing "Shooter", ballistics for Android!

Not a great thing for most of you guys however,

I ran the programe through it´s paces this weekend,

shot a 308 Win out to and beyound 700 meters in 3,5-7 m/s winds from 2 o´clock and some really nasty light,

also shot my 6 mm TCU out to 500 meters ringing steel about half the time,
@300 meters it was a dead ringer so to speak,

last I spotted for my shooter friend and he did better than me,

well Sean, it could have been done with out your program but not as smooth and with a lot less accurate.

Sunday morning, we both had first round hits at 500 meters and 600 meters at steel 15x15 inches and at 500 we both did all the five targets, 15x, 12x 10x, and 5x inches, really nice I must admit.

Sure none of this exites you guys but for us it´s decent shooting.

Best regards Chris
 
#377
Re: Introducing "Shooter", ballistics for Android!

As of tonight, the full version now supports zero atmosphere as well as powder temperature/muzzle velocity variation per temp degree inputs for adjusting muzzle velocity based on powder temperature. As always, I'm happy to hear any feedback.
 
#379
Re: Introducing "Shooter", ballistics for Android!

Please include a changelog on your site for us Linux nerds. As previously stated, Density Altitude support and "Range Profiles" which would be saved conditions/altitude for different shooting ranges/locations. Kind of a digital dope book I would pay at least double for.
 
#386
Re: Introducing "Shooter", ballistics for Android!

What phone do you have that's *still* running 1.5?

Many people with newer phones that have small screens were unable to see my application because the app was built off 1.5 APIs and doesn't support specifically declaring support for their screen size. So Android v1.6 or higher is now the lowest requirement. You're phone running 1.5 really needs upgraded.
 
#387
Re: Introducing "Shooter", ballistics for Android!

I know you weren't referring to me, but in light of hardware compatibility list, I am running a rooted Nexus One with Cyanogenmod 5.0.6 on Android 2.1 of course. I am receiving all updates correctly from the market and have not ran into any bugs yet.
 
#388
Re: Introducing "Shooter", ballistics for Android!

I have a Eris. Can I update it? I had a Eris with the leaked 2.1 but then I can not see or get protected apps. I could see the paid version when it first came out and I purchased it and have it just no updateds.
 
#389
Re: Introducing "Shooter", ballistics for Android!

field,

Eris doesn't have an official update for at least 1.6 yet?

If not, yees you can go ahead and update it with your leaked 2.1 and you should see Shooter full in the market.

You're missing a lot of new features
wink.gif
 
#394
Re: Introducing "Shooter", ballistics for Android!

I knew someone would have to complain about that :p

You're right, it's definitely not critical just like DA input itself. For one-time atmospheric condition input in your ammo profile, it's definitely not as big of a deal as the current atmosphere input. I'll likely add this ability sooner or later, its just definitely one of those things that can wait.
 
#396
Re: Introducing "Shooter", ballistics for Android!

v1.3.0
- Fixed bug in HUD solution screen - computing spin drift when it shouldn't

v1.2.9
- Fixed stability factor calculation when using Density Altitude
- Fixed "out of date" error in web sync
- Changed background color from off-white to white
- Changed the look of the Location/Air Density display in the shot data input screen.

Source: http://sean.kndy.net/shooter/changelog.txt
 
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