I’ve had pretty spectacular results with TTSX bullets over the years. I’ve probably shot a dozen deer using slightly lighter than standard weights, i.e. 120 gr bullets in in a 7x57 or .270. They’ve almost always dropped within 20 yards and usually much less. One time though, I hit a large doe a little high and a little far back on the shoulder, at least that’s what I think. She took off and all I could find were a few drops of blood where she was standing when I hit her and then in one or two spots within a few hundred yards. That’s the only deer I ever failed to recover and it still bothers me. My guess is I missed the heart, lungs and spine and possibly the bullet failed to open, but maybe it was just the shot placement. I still use Barnes bullets almost exclusively.