DakotaDeer,
It isn't hard to see the difference in terminal performance between the TSX and TTSX when the TSX doesn't open up at all. I have seen this a few times with small-caliber TSX's, but never when using TTSX's.
Also, the few TTSX's I've seen recovered have indeed opened up noticeably wider than TSX's of the same approximate size. The same is true of other plastic-tipped monometal bullets, such as the Nosler E-Tip, so it seems to be a characteristic of plastic-tipped monos.
