Guillotine's can make a mess of your trophy and in some states you have to check in an INTACT bird and that won't happen when that broad head lops off his head. Plus too much tweaking of the arrow shaft and such.
I'll stick with Magnus fixed blades.
Remember the 343
George Johnson, Ladder 157
Dan McWilliams, Ladder 157
Bily Eisengrien, Rescue 2Scott Strauss NYPD ESU