I have shot two bucks with them in the last three years. They dont seem to have much knock down power and dont leave much of a blood trail. One buck was shot in the heart and there was no blood at all. The buck went over 300yds lucky for me it died in the trail on my way out. wensday I shot an 8pt threw both lungs I thought I missed I followed the tracks in the snow for 150yds before I found a small drop of blood and two hours of serching I found him.If there wasnt any snow he would be lost. I Shoot 150gr. pellets 270gr platinum bullets.