Having shot up my small supply of 3.5gr red dot under the 92gr round nose bullet I loaded some more primed cases with 1 grain less...2.5gr of red dot. The results were the same it seemed in report at least, I think I'll start to move away from the light 92gr bullet as moving to a heavier bullet will give me less of a report. I have access to a noise dosimeter and may include that along with a chronograph in the next extensive testing day I have at the range. Just for kicks I'm curious how these loads compare with similarly loaded full length .38 Special loads as the load density (or amount of air space left in the case after bullet has been seated) is significantly lower. The 92gr round nose were what I had on hand really for initial testing and I feel comfortable moving to a heavier bullet (105gr Lee or heavier as previously mentioned) The short colt although loaded with a heavier bullet might be made to the same OAL as a .38 special loaded flush with a wadcutter, something I happened to notice that somebody else pointed out on another forum when researching this round.
The accuracy with these loads has been "ok" nothing stellar and nothing tested over 25 yards as the drop is significant past that distance, a quick guess on the ballistic calculator has it dropping over 36" at 100 yards if its clocking around 600 fps and a mere 24" if its getting 750 fps out of the muzzle.
Closing thought, check the chamber for leading build up just like you would with .38 special and check back for more info.