Ran a few through the chrony today using the 22" Handi rifle.
10.0 gr Blue Dot, .357 Mag brass, 180 XTP/HP, CCI 400 at 15' loaded at the bottom cannelure (this load was too long for my Security Six cylinder)
1275 fps
1339 fps
1359 fps
1396 fps
1359 fps
1345.6 average
11.0 gr 800X, .360 DW brass, 180 XTP/HP, CCI 400 loaded at the top cannelure
1632 fps
1645 fps
1649 fps
1642 average
I found the POI changing with the rest position, by a lot! With the reat at the front of the forearm, it was shooting 6" low. Thinking this was the norm, I raised the scope 5" before I noticed what I was doing with the rest. When I moved the rest to the forearm screw, it was shooting 5" high! I guess I should have left the scope alone and just changed the resting point. Oh well.