Nathan, I'm loading the 124gr Berry's with HP-38. Hodgdon's data for this is 3.9 to 4.4gr. They also state a OAL of 1.150 while Berry's states 1.160". Right now I'm at 1.155 and 4.1 gr of powder with room to go up. So far I like this load.
So it appears the Titegroup is quite a bit hotter/faster than the HP-38.