Dang if the 7mm Rem Mag is now under powered my poor little 7mm-08 must be absolutely unethical and all those clean kills must have been a fluke......... No trust me there is nothing under powered about the 7mm Rem Mag unless you are talking about hunting trophy brown bear or dangerous African game. Sounds to me like you completely missed the vitals, just about any bullet placed through the heart/lungs will kill in seconds.