The Hornady 265gr FP is probably the only .429 bullet that is actually designed for the .444 and itf rifle velocity unlike all the others that are designed for the .44 Mag velocity.
Personaly I like heavier bullets in my 444. I've great succes (on paper) with the 300gr Hornady XTP, .300gr Speer UC and 300gr-325gr custom cast bullets.
