Ballistic App ?

[Clayne_b]

Im sure this question has been asked before so forgive me...

What is the app that works best for the property's of a .22lr? I will be using it on my Iphone 3g.

there are a few that i have looked at but seems as if most are designed around high power rifles. I have used hawke chairgun pro and really like it but its for on the computer.

 

[jt_trouble]

JBM is the only one that comes to mind. google gave me the name Ballistic and can be found in the appstore on itunes.

 

[sniper762]

Isnipe

 

[Juster]

Anything, as long as you have the BC and muzzle velocity.


But............
Technically, a lot of the drag tables have few values around 1000fps, where drag changes most dramatically with velocity, so you want drag tables with lots of data points around 1000fps.

You can see how sensitive drag (green line) is at 22LR velocities.

The GNU _retard.c program ("http://sourceforge.net/projects/ballisticslib/files/GNU%20Ballistics%20Library/0.100%20alpha/GNU_Exterior_Ballistics_Library_0.100a.zip/download) has:
else if (vp> 1150) { A = 1.379746590025088e-11; M = 4.25 ; }
else if (vp> 1100) { A = 4.070157961147882e-13; M = 4.75 ; }
else if (vp> 1060) { A = 2.938236954847331e-14; M = 5.125 ; }
else if (vp> 1025) { A = 1.228597370774746e-14; M = 5.25 ; }
else if (vp> 980) { A = 2.916938264100495e-14; M = 5.125 ; }

Which doesn't have as much precision as one might like. For example. Some programs are way worse than that.

From memory, JBM uses a function which has a smooth line rather than a jagged line lookup from a table.

 

[Jäger1]

Winchester ballistics app is good but doesn't allow you to input values and only works with winchester factory ammo

 

[rtracer13]

Ballistic FTE on iPhone. Pricey, but I haven't seen anything outside ballistic PDAs that could calculate trajectory as fine.

 

[Courtntan]

Isnipe

What he said, best $8.99 I've spent on an app, and designed by a fellow nutter IIRC.

 

[little_airwolf]

I'm guessing Isnipe doesn't work on the android devices. As you can tell I'm new to the apps. So what would be an alternitive app? I found bulletflight. Does L2 have more .22 data or would I be inputing everything anyway so L1 is fime?
Thanks!

 

[Clayne_b]

I forgot i had mil-dot ballistics by Tom Holsten on my I phone from a year ago, i ran some numbers it looks like it is going to work very good

 

[Potshot21]

iSnipe!! It was the first app I bought when I got my iPhone. I use it all the time and love it. Also helps me make a more educated decision when deciding which calibers are more desirable for certain applications.

 

[arcstarter]

I use iSnipe as well, it is a very easy to use program with thousands of ammo choices and it will put you on paper at almost any range if properly set up