i'VE WROTE IT IN A COUPLE THREADS ALREADY , I TESTED MORE THAN A FEW BROADHEADS INTO A 1 INCH PIECE OF PLYWOOD ON SUNDAY, CUT ON CONTACT BROADHEAD FAIRED OK, TOO MUCH CUTTING SURFACE TO PENETRATE PROPERLY, MUZZY'S ON THE OTHER HAND PASSED RIGHT THRU IT, NOT SAYING CUT ON CONTACT BROADHEADS WILL NOT WORK, BUT FOR MY MONEY AND THE SHOT OF A LIFETIME MUZZY'S MY BROADHEAD OF CHOICE.