if yer talking about the cut hole thats backerds as a crawfish.
A two blade head will out penetrate any three or four blade head, everything else equal.
So you think a two blade cut has a greater chance of closing than a 3-4 blade?
I was talking about a two blade fixed head actually, but the science is the same a two blade head will out penetrate a three or four blade head...less drag. I have shot three blade mechanicals and fixed and found that the penetration I got was not what I wanted to see, esp with big three blade fixed heads.