I imagine that it would be very similar to the 270 Spire point from Hornady. your seating depth would be similar as far as seating the base of the bullet to the bottom of the neck and stopping there so you will not be taking any more case capacity. The only difference I could think of would be the bearing surface of the bullet and causing a pressure rise possibly if the contact area was more but without having the two rounds in front of me, I have no clue what to tell you on that. I would probably back off the 270 sp data and work up slowly personally, plus.....no two barrels are always the same. Especially the TC barrels trying to use JDs data. If I'm not mistaken, the 375 data that I have has a separate section for the TC barrel....