I've not loaded up any of the new(er) 124gr MPR rounds yet, but I'll PM you some info. from others that have done that with an XD9.

For my 124gr RN loads, I'm running them around 1.13.

Your 5.3gr may be a bit hot when the OAL is only 1.06, that's a bit deep so the pressure will increase... Check your Inbox.