I have been using the Grim Reaper 100gr. for about 4 years now and I actually tried some Wac'ems just prior to going on a bear hunt a couple weeks ago. Once arriving in Canada I used my Grim Reapers anyway and left the Wac'ems in the case. The Wac'ems flew right with my mechanicals but I just have had nothing but good luck w/ the Grim Reapers. After shooting by bear w/ them and a 15yd. recovery I am still hooked on the Grim Reapers.....