Anyone know that actual beam width of the Dunlop 300 Tour? Most specs say 20 but I've seen 21, including on the TW review.

It's 20mm. Exactly the same mold as the M-Fil 200 16x19 http://www.tennis-warehouse.com/descpageRCDUNLOP-200P06.html

Thanks. Do you actually have either of these? I know that they can be very different from the posted specs, and since the TW review listed it at 21, I thought I'd ask around.

I think I recall reading somewhere that the 300 Tour mold is also the same as the TFight (320 and 335), and that Dunlop essentially bought it from Tecnifibre. Anyone know if that's the case.

The Aerogel 4d 300 Tour is from the same mold as the M-Fil 200 16 x 19? But 4D 300 Tour has a 98 sq in head whilst the M-Fil 200 16 x 19 has a 97 sq in head.

Yes. Seems they are the exact same mold and same head size (as are older TFight 320 and 335 it seems). Now I haven't done the math myself but if the 200 is 97 then it's the same - and 97 is a bit closer since the 200 and the Tour are a bit smaller than the regular 300. Not sure where TW got the 98 - maybe that's just what Dunlop said. 1 sq inch is pretty hard to tell anyway. But yes - the 4D 300 Tour and the M-Fil 200 16x19 are dead on.

I believe that the 300 Tour is actually a 97 and not a 98. When it was originally introduced, the specs listed it at 97. Maybe a 98 is easier to market.