rsvman2 I think most modern driver heads come in between maybe 193 and 200; average is probably 195-198.
That would be the non-adjustable heads. I've tried several brands of the new heads with adapters and find most are 203-206, which has to include the adapter as it is the hosel. TM may be the lightest at 200, w/adapter.
Steve started the No Brainers out to be around 205, but later lightened them some. The heavier ones were the best, from my experiences, much like the heads today are.