OK, my buddy got a .17 HMR. It is nice and a tack driver. At less than 50 yards, it will set off tannerite. We started shooting tannerite the other day at 100 yards. It appeared that I missed 3 times in a row. I went and got the tannerite and it had 3 holes in the front of the flimsy plastic container and none out the back. Sure enough, none of the 3 bullets penetrated the approximately 2.5 inches of loose prill (think loose sand). Not only was the energy not enough to set off the tannerite, it appeared that the energy was not enough to penetrate much at 100 yards. We were using two different types of CCI 17 HMR ammunition. One type had a ballistic tip and the other was a hollow point. Is something wrong or is that really all the energy the round has at 100 yards?