Use your Solidworks file to verify in Mastercam
Got this question asked the other day, and thought maybe it would make it worth for someone if this one year old post got dusted off, and came back out in the sunlight.
If you import Solid models into Mastercam and you are not using them for verify, then you are missing on a cool feature, more than once this has saved me the hassle of re-programing a part because I forgot to drill a hole or clear a feature. 1st. picture is just a preview of the solid and stock display turned on.