I shot some CCI vmax ammo today out of my CZ 17hmr and it shot lights out. I have not been able to find any consistent 17hmr ammo. Thought that the TNT was probably the best available. Did not expect this box to shoot as well as it did. I thought the gun was not capable of how it shot today. Shot 10 5 shot groups @ 50y that were all good with nary a flier. One group was a ragged hole. Largest was probably .4 ctc.