I currently load 2 1/2” 12 ga for my Damascus barreled hammergun. I keep pressure under 6300PSI. I am considering buying a 28 ga Damascus barreled gun but I cannot find info on any loads under 9700psi. I have checked Alliant and Hodgdon websites as well as searched this website’s and other forums. Am I stuck buying RST which is a total crapshoot as far as availability is concerned?

Thoughts?

Thank in advance