Prerequisites
You should have created and configured a shooting range at this point. If you still need to do so, read the following articles:
How to Create a Shooting Range
How to Configure a Shooting Range
Using a Shooting Range
Approach the shooting range console and press E. This will bring up the mode selection screen.
Choose a gametype you wish to play. If you do not see any gametypes, add them to the shooting range by following the instructions in the How to Configure a Shooting Range article listed above.
Once you have chosen a gametype, you should see the leaderboard and difficulty selection screen.
Choose the difficulty you wish to play by selecting the difficulty icon.
Start the game by selecting the Play button.