There isn’t much need of a 77 TGK either, the 77TMK behaves in an excellent manner on game. I was skeptical but tried them at Form’s recommendation and they are outstanding at 223 velocity. We killed 2 bucks and some pigs this fall with them and the 2 we recovered looked like magazine adds for hunting bullets, perfect mushrooms and perhaps %50 weight retention.
Just think if it had been a 62 ttsx you couldn't have recovered it, but if you would, 100% retention and great mushroom... every time. LOL.