The OP seems to be asking several questions about the Trophy Bonded Tip that no one is answering.
Yes, the Trophy Bonded Tip is an excellent elk bullet. Based on the Trophy Bear Claw, a very tough dangerous-game bullet, the Trophy Bonded Tip was designed with a polymer tip and a deeper lead-filled cavity so it would open up quicker and to a larger diameter on smaller game.
According to the maker (Federal), it still retains an average of 90% of its weight in game and is a deep penetration bullet - what I think of as an ideal elk bullet.
Whether you choose 130gr, 140gr or 150gr - there will be little difference in actual performance on elk, but I always lean to the heaviest weight bullet available that shoots well in my rifle for animals as big as elk.
