Most of you here are seasoned vets, but here is a post for not so experienced.
An effective broadhead must possess three characteristics regardless of brand.

1) They must fly true and consistently hit where you are aiming.
2) They must be durable enough to stay together upon impact(I have seen some heads come apart)
3) They MUST be sharp enough to cause massive hemroging and blood loss.(Rocky mt., N.A.P., Magnus Stingers, Wasp, Silver Flamesall come SHARP as an example)

If your head possess these three characteristics and you hit them in the vitals regardless of the brand they will be effective on all game.

Andrew

P.S. The Rocky Mountain Ironhead 125 heads are the best I have used for the reasons stated above.