on a guided hunt my son dropped an elk in its tracks at 200 yards with the copper bullet so it was certainly effective. the article has really peaks my interest. the same can be said for other weapon types and classes. can you tell me who makes the actual digital timer for these feeders? they responded to all of our wishes as to what to play and what not to play, made our special dance songs sound perfect, and our guests had so much fun all night. happy christmas to you too and i hope 2017 is full of just as many adventures! 