The last piece of cast iron I shotjust wouldn't die, had to shoot it three times. Maybe where you live the deer are steel plated, but mine aren't. The last piece of cast iron I shotjust wouldn't die, had to shoot it three times. Maybe where you live the deer are steel plated, but mine aren't. I may be one of the few that doesn't take too much stock in what a blade does through steel..
Me either.

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I do however, for the animal/heavy bonepenetration part,believe in the proven research done on actual animals (Dr. Ashby).
For the deer/elk seasons that I used to use Stos two bladed heads, I personally found them to go through game like butter. Never found the need totry to shoot between ribs or such. Problem I had with them were lacking blood trails, even on double lunged animals. Since then, I have moved to Phantom/Stinger four blade, and havehad much better trails.
However, when Igo after moose, I will be back to thetwo bladed/non-vented heads for max penetration.