Hello Gentlemen:

I do not know if you aready know about this software. It simulates patterns with different chokes/pellet size/velocity/charge weight/ etc.
It is free to download.

http://www.blackbartsoftware.com/shotgun.htm

I am not sure if it is accurate (and usefull) or just a passtime.

I will be glad to know your opinions.

Best,


Jose M. Fernandez