2.75" m66-8

.357

158gr jsp over 13gr Shooters world heavy
1091fps
418ft lbs

147gr speer G2 over 14.2gr aa9 seated to first cannelure
1068fps
372ft lbs

147gr speer G2 over 7gr Win 231 seated to first cannelure
1046fps
350ft lbs

.38

147gr speer G2 over 5.3gr win 231 seated to second cannelure
930fps
282ft lbs

I've got some more of the G2s loaded over 7gr 231 with the bullets seated a little deeper to see what they get.