On Thu, 5 Aug 2004 15:17:08 -0700, "TeamCasa"
wrote:

I've used thousands of each, still no preference. As you already know, the
flutes or sprial cuts are to prevent a hydraulic lock when driven/pushed
into the hole.

That's what I gathered. I've not yet used the fluted kind, but we got
a bag of them delivered to the shop today. We'll see.

JP