I added grip as a new shooting parameter for season three to increase the number of possible courses of fire.

Most people prefer to shoot with one hand or another. That is the strong hand/side. Here are the grip options:

Strong side two-hand grip = preferred hand on grip and trigger; other hand used to stabilize the airgun.
Weak side two-hand grip = non-preferred hand on grip and trigger; other hand used to stabilize the airgun.
Strong side single-hand grip = preferred hand on grip and trigger; other hand is behind the back or relaxed at ones side.
Weak side single-hand grip = non-preferred hand on grip and trigger; other hand is behind the back or relaxed at ones side.

Shoot safe.