The load I have been using in my xdm9 with the factory spring is as follows:
4.3 grains Alliant Bullseye powder
115 grain Berry's plated round nose.
I do not have any chronograph data for this load, but at 4.5 grains of bullseye I was running around 1190fps.
4.3 grains is pretty easy shooting and I use it for 3 gun competitions and IDPA.
As always, ymmv, and this load is for use at your own risk.