Thanks for the replies. Without re-posting everything let's be clear, I fully realize that this is nowhere close to being a 'scientific' endeavor, nor was Ackley's. I guess the best question to ask is there a way to roughly calculate chamber pressures? There is a Powley Computer online but is designed to compute safe loads only, that is, if I'm understanding it correctly. What I want is to have some idea of the pressures being generated. If that's impossible than so be it. I'm not a ballistics person. I don't really want to buy some relatively expensive software that I'll never use again. Thanks again for the replies.
BTW, who is Clark and how do I locate him?