When I shoot the XTPs I like them in the .430 diameter (44 caliber). Then I use the green sabots with them.
i used the 240 grain .430 bullets for many years. Used both the black and green sabots. Killed at least 20 deer and about 75 hogs with that bullet. IMO: It's a very good bullet.
i played with some of the 240 grain .452 bullets Magnum bullets but never got the accuracy the .430 bullets were capable of. May have killed a few hogs with the Magnum bullet.