A:
Well, I have many round head molds from Do-It and I use a minimum of a 1/0 from 1/8th up, so I would say yes.....
Just make sure to use the proper hook for the mold...The majority of round head molds from D0-it are light wire molds 570/575 style, although they do make some (pro-line) that use the heavy wire hooks.
With the light wire hook molds I like the Mustad Ultra-Point hooks, along with the Eagle Claw 570 and the Matzuo sickle hooks (best bang for the buck!) in the black nickle or bronze finishes.