They definitely shoot flatter over 200 yards than do the RN or FP types.
I shot one WT buck with the 160 FTX out of my 336A Marlin. [MV 2430 fps]
Shot was broadside, at about 85 yards.
My take is that they are just a bit fragile. Only found the jacket base and
fragments of jacket in the far side rib area. No part made it to the hide on
the offside.
In contrast, the Speer 170 FP exited on a similar presentation/shot placement.
The exit was about twoonie size. Lungs were heavily damaged. EE