I'm not a big fan of mechanicals due to seeing to many give poor penetration.Granted I have never shot them but have spent more than a few hrs helpen buddies who use them find hit deer that didn't have good penatraion.From talken to them and readen alot of articles on the subject any angled shot with a mech. can turn into a very big hassle locating the deer.
As to all bh fail that is true but so far the most dependable i've shot in the Magnas 2 blade (125 gr.) ...only downfall is not a big entry or exit hole.......but plaenty big enuff to put any deer down......So regardless of what type of blade ya use any thang can ...and sometimes will go wrong....lol...if it was me -n- had this experiance...i'd be snagged some new heads real quick like.....just my opinion

If god didn't want us to eat animals....Why did he make them outa meat?