Bees is right. Drop the $10 on the practice blades and stop worrying about breaking sharpened ones. You shouldn't hunt with blades that have been used on a target anyway. One of the problems with using mechanicals on foam targets is that the foam gets into the slots where the blades go. You have to really clean it out after every shot or your blades may open in flight or break. The Spitfires are worse because the foam gets behind the retention clip also. If you can afford it, buy another set of Spitfires and a pack of practice blades. Use the old ones just for practicing and the new set just for hunting. When deciding if you can spend the money, imagine that you are looking at a 12 point buck of a lifetime and wondering if you cleaned out your broadheads enough to be totally confident in them. Makes my decision easy.

Steve