Anyone loading 2 1/2 inch 20's with Alliant 20/28 powder? I'm looking for a starting point to get a low pressure load developed for my damascuss 20's using 7/8th oz shot, RST Hulls and Win 209 primers. The lowest pressure load on Alliants web site is 8880 PSI and 1200 FPS. I'dlike to keep the velocity around 1150 and psi below 7500.