The loading port on the SBE3 has a shooter-friendly design. The length and shape of the shell lifter make it less likely for a finger or glove to get pinched. And the beveling around the edges of the port, particularly at the end near the trigger guard, help guide shells into the magazine.
There are lots of curves and swoops incorporated into the design of the SBE 3, but, as with the shape of the forend cap, they serve a function beyond mere aesthetics. The triangular geometry of the cap makes it easier to grasp and remove compared to a traditional round design.