I was able to get 911fps 230ft/lbs with a 125 Speer Gold Dot and 8.0gr of HS6 out of my 642.
The most energy I was able to get was a +P load. I used a 158 LSWC and 6.0gr of Power Pistol. It made 876fps or 269ft/lbs.
anti-state, anti-war, pro-market