I've been working up Longshot, 200gr Zero FMJ, CCI 300 primers, 1.260" OCL, Starline brass 10mm loads for a Glock 20 with Lone Wolf 5.2" bbl. Started at 7.2 grs (Hodgdon start load) and worked up .2 gr at a time to 8.2 gr (Hodgdon max load). Brass looks good - no cracks, primers not flattened, normal Glock rectangular primer extrusion, expanded to 0.428". I finally got my Oehler chronograph up and running and chronoed the loads this weekend. 1265 fps! And, it was about 25 degrees Farenheit. That seems way faster than I should be getting. Also, I now have some concerns about what this Longshot load would be like in the summer at around 90 degrees. Any suggestions?