I grip both handles the same, 3 fingers on one side, on finger on the front, and the thumb on the other side of the handle. In fact, that's how I hole all pump handles, except the Phatom, since it's an over the barrel pump.
Live or play near Metro STL? Organizing monthly pump meetups at the many different fields near STL. Check out "STL Pump Group" on Facebook for more info. Best Field in STL