So things to remember.
Play it your way. If you are weak with hangun, there is shotgun and rifle.
Some targets are legal for more than 1 platform. The Rock says "Know your damn rules"

Shooter on the left, shot it as briefed (minus having the safety on, on the empty shotgun - brain fart).
Shooter on the right, feeling strong with the handgun.

Also note that 3GN targets are either 1 hit in the middle or 2 shots anywhere. So you can save time by hitting close targets only once and moving on with no penalties.