If you never heard of or used the (free!) software available at www.shotgun-insight.com then I'm sorry, you missed a site that was extraordinarily useful. I don't mean the site is down, it's still up. But the tools available there, although still available for download, are essentially useless. The problem is that the enormous effort that Dr. Andrew Jones put into understanding the science of external ballistics as applied to shot loads, and the software he developed to make his knowledge available to anyone with a pattern board, is wasted. His (highly recommended!) book is still available at the web site but the software is useless to anyone not using an antique computer with an unsupported operating system. That's because all that software requires a browser that supports Java™, and Java has been deprecated for at least five years now. No current version of any of the common browsers I know of support it. So here's my question: does anyone know of an alternative?