I think the TSX bullet will turn out to be one of the best buullets ever made. However at this point the Nosler Partition is about the most proven bullet out there. Its design was perfect on paper when Old John drew it up and it proven its self to be up to about every task asked of it. A bullet needs to be tough for close range but open well at reduced velocity at long range. Nothing can do this job as well as the NP. If I had to bet my life on a bullet, this would be it. IMO.