Solo1000 rocks for 9mm.
Use the dowel rod method for finding your max oal. Clear the chamber and stick a dowel down the barrel, mark the edge of the barrel with a pencil line. Remove the barrel, drop a loose bullet that you plan to load into the chamber and use a pencil or another piece of dowel to hold the bullet just snug up to the lands. Insert your dowel down the barrel again and mark it at the edge of the barrel. Remove bullet, dowel, etc and put pistol back together. Use your mic to measure the distance between your two pencil marks. That is your absolute max oal, and I recommend dropping down at least 0.010".
FWIW, my XDM had a very tight/short chamber compared to my STI and Glocks...