I used the original Tekan in 03 and had good luck with them. 2 shots 2 kills. The doe ran 20 yds. and piled up and the 10pt buckI shot ran 50 yds. and piled up. The only downfall I found with them was that in the originals the blades due seem to fall out. Lost one blade in a target and lost one in the ground after it went through the deer.