I'd do a little research on brian pearce's 2012 power pistol load. He was using a 158gr (ya I know, you're using 173gr) lead bullet and duplicated a safe p+ load that equaled the buffalo bore fbi load. He was getting 1000fps+ out of a 2" bbl'd snub nosed 38spl (ruger lcr) with a 6.8gr load of power pistol that tested out safe/within max saami pressures. I'm sure you would get allot more velocity from a longer bbl. Should put you in the 1200fps range your looking for.
i thought the original powder/load keith used for the 38/44 was 10.0gr of dupont's #80. Which is a pretty hot load considering the 1929 lyman handbook states for the 429421 44spl loads/bullet "4.0gr to 5.0gr of bullseye is extremely accurate. Mr. Keith also recommends 12.0gr of DuPont's #80 in the latest heat treated revolvers".
Keith tried 11.0gr of DuPont's #80 in the 38/44's. Sent some loads out to peter's cartridge co to be pressure tested. The 11.0gr #80 load came back at 42,000psi.
To duplicate the original factory loads:
358429 11.0gr 2400
358429 12.0gr 4227
i thought the original powder/load keith used for the 38/44 was 10.0gr of dupont's #80. Which is a pretty hot load considering the 1929 lyman handbook states for the 429421 44spl loads/bullet "4.0gr to 5.0gr of bullseye is extremely accurate. Mr. Keith also recommends 12.0gr of DuPont's #80 in the latest heat treated revolvers".
Keith tried 11.0gr of DuPont's #80 in the 38/44's. Sent some loads out to peter's cartridge co to be pressure tested. The 11.0gr #80 load came back at 42,000psi.
To duplicate the original factory loads:
358429 11.0gr 2400
358429 12.0gr 4227