I said nothing about hard to kill. Moose are hard on bullets. The majority of moose I've killed have stopped bullets; everything including Core-lokts, Hot-Cors, GameKings, Partitions, FailSafes, Ballistic Tips, XFBs, Uni-Cors, Grand Slams, TSXs, Weldcores, Interlocks, A-Frames… I have them. Doesn't matter whether they are shot with 6.5x55, 7mm-08, 30-30, 30-06, 340 Wtby, 358 Norma, 375, 45-70, moose don't have any trouble stopping stuff. The 139 Interlock is an ideal caribou bullet in the 7mm-08. Perhaps it's fine for elk; I can't say one way or another. I certainly wouldn't suggest it as a good choice for hunting moose. Monos have lost their luster with me as well, but the TTSX is easily the better choice of the two the OP inquires about. I think the tip has certainly helped it overcome the most serious problems it previously had sometimes.
