I have been spending alot of time on the Accurate Mold website, most of the designs that I find most interesting are just a little heavier than I would like, but they are also rated using COWW. At least initially I will be using hardball alloy. If I am understanding correctly, I might be 8% less than COWW ? So a boolit advertised at 265 might drop as light as 243 using the harder alloy ? I do realize that advertised weights are not always accurate.