Pglasgow I must say, your posts amaze me. They make perfect sence, even though you are talking about some seriously complex principles. I learn so much from them that aids me in my shooting. Granted, I don't think I will ever be able to calculate like you can, but I now know that if my groups are narrow and tall, then I need to make my power weights more accurate.

Thanks for todays lesson, I look forward to more!