PaulEamonn - Aye, that's the program alright, however I can only find it available through Apple's 'AppStore' i.e. only works on Apple products (iPhone, iPad etc..)
I have a HTC phone running the Google Android operating system, and their apps all come through the Google 'Play Store'. Apologies if this is teaching you to suck eggs, if not hopefully it'll clear it up a bit!
With the features you describe though, it sounds perfect for answering this question!! If it's not too cheeky, could I ask you to use it to calculate an 11.0ft/lb .22 gun shooting a 16.4 grain Air Arms Diablo Field at 545fps please, and post the results at the various increments?!
I've looked on Chairgun Pro but can't make it stick to the three parameters you've specified.
I've enter the weight at 16.4g (I'm guessing you're using Air Arms Fields in 5.52?) and 11 ft/lb but then it calculates the fps as 550. When I enter 545fps it only gives me a muzzle energy of 10.82ft/lbs.
Anyway, I've attached the table and chart for a pellet weighing 16.4g with a muzzle energy of 11ft/lb. I hope it helps.
As for the explanation of the other stuff. Don't worry - no eggs here! Just stuff flying over the top of my head and an understanding of phones that can do everything that is still as clear as mud!
Thanks for trying though.
Edited by PaulEamonn, 07 March 2013 - 11:28 am.