I think Trophy bonded bullets took a nosedive once Federal bought out Jack Carter. I was at the range last year and a guy shooting a 260 had some that looked they had been heated and turnedblue because evidently they are annealed .. They shot very quirky and according to the shooter it was the worst batch of TB's he had purchased and was going to bring them back. They tended to stick and therefore raise pressure and their BC was not the greatest. In most cases BC was not an issue but since everyone else is going to high BC bullets they didn'[t want to be left behind. Grooves address the stickiness issue. I still think that before long lead bullets will be outlawed and when they do the TB bullet will be history since it works with lead remove the lead and you have a glorified TTSX.