I have shot several deer, hogs, and Turkey with the big 160gr snuffer with a screw adaptor witch took it up to 212 gr. and have shot through most everything. I had the good fortune to meet Roger when he was still making the snuffer and he always shot a 4 fletched arrow as do I. For sharpening I use a 8 to 12 inch mill bastard file and run along two edges at once. From there I strop on leather, that seems to put an edge on that when I put the broadhead up to my arm hair 3 inches in front of the blade jumps off in fear!! I have always liked a heavey head and believe that to be a factor in the penitration I have always gotten. A friend of mine put one of the big snuffers completly through a 200lb buck shooting 47 pounds.