Welcome to the XD Forum hillbillygrunt !!
I own the Gen 3 G30SF...carry it everyday !!
The SF model reduces the circumference of the receiver at the rear, or "back strap," offering increased comfort and control, especially for shooters with smaller hands.
Total Length: 6.97 inches
Total Height: 4.45 inches
Total Width: 1.28 inches
Barrel Length: 3.78 inches
Loaded Weight ( 10 rounds ) approx 33.69 ounces
Don't own an XDm...cannot comment on that.