hornaday XTP are rated for proper expansion up to 1500FPS. i agree that they may be a little extreme to be optimal for the bullet, but if you stuck with a 147gr bullet, i think your speeds will stay well within velocities for the XTP not to have unwanted shedding or fragmenting. i also load specifiaccly for a carbine and use either the 147gr Golden Saber(sheds some petals but expands to over .50 fro m carbine) and the Sierra 125gr JSP "Sportmaster" (not a HP, but a generous soft-point that mushrooms to perfection and retain 100%), load them with a max charge of HS-6 and they run great to 50+ yards from the 16" carbine. i have just begun special loads for my 9mm AR with 5" and will likely just stick to FTX's. Have fun, and remember to take into account the distance you want your carbine to be accurate, the heavier bullets really help keep it straight when shooting at signifigant dinstances.
this is the sierra JSP sportmaster. note that this projectile, or any sierra JSP prjectile is not sold in .355. this is a .357 run first through a .356 sizing die and then a .355. although a .356 would like be no problem, just slug your bore and see where your at if curious. but this seems to be a very effecive high speed 9mm carbine load.
sorry for poor spelling/typing. my tablet is having serious keyboard issues and will not spell check on this forum. i am not actually retarded, i swear