I have used HP-38 (samething as 231) in my XD 9mm with good results. Below are the only two loads (both are light) I have personnally used with this powder so far (average velocity recorded through my chronograph):
1. Lead RN 125 grain bullet with 4.0 grains of powder (COAL = 1.136) resulted in 978 fps.
2. Berrys (plated) DS RN 124 grain with 4.0 grains of powder (COAL = 1.14) resulted in 961 fps.
Personnally I like Accurate No. 2 a little better and would be happy to send you that load data if you need it. I hope this helps.