I've hunted with both and was disapointed with the Spitfires. I did take 2 deer with Spitfires but on the second when retrieving the blade I noticed that one of the blades had never opened. Also had a customer who told me of an antelope he shot with a Spitfire. The arrow passed through the heart. When field dressing the antelope they could see the definate broadhead pattern through the heart and could see that only two blade had opened. I switched to Rocket heads and use the Stealheads for deer and will use the Hammerheads on turkey this spring. They will definately open on impact. Just be sure to keep an eye on the o-rings and replace when they look a little worn.
Jon
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