Have been "rollin' my own" in an attempt to get some low pressure loads for my "elderly" classic sxs's. Use a modern sxs test gun and a chrony chrongraph. Using virgin components. Have read Ken Olerer's comments on chronographing shotshells. Have found using well established "recipes", that here at sea-level the recommended low velocity(probably also low pressure) seem to read consistenly 150-250 fps over book values. No pressure signs,etc. Any thoughts? Thanks, Dr. BILL