I was having the same problem with the XTP's....so I used a RCBS 9mm expander die to flare the case mouth. It meant an extra step, but it worked really well.
If you want to load .357 diameter bullets like the Speer 158 gr. JHP or 110 gr. GDHP just use a .357 expander plug.
All the bullets I tried seated straight and had no feeding issues in the gun.