I have done it a few times.  A few tips; work on getting your loading time down including experimenting with pre-measured charges, loading blocks etc.  Also, the smaller calibers tend to foul up in the Friendship humidity so find a lube that you can cut down on cleaning in between shots.  Practice at the distances and getting your shots completed in time.  There are swingers and paper targets in the shape of the animals or just stick to bulls eye.  You might try some cardio work out too like race walking, running etc.  That will keep your heart rate down as you work through the match..  If you can find and NRA smallbore cowboy silhouette shoot nearby, it is a great way to practice with the same size targets with a 22 that you most likely already have.    Lastly sign up for a relay once you get to the range.  It is pretty popular and spots fill up fast.  Have fun!

5 minutes for each bank of anaimals with I think 2 minutes between banks to clean.  You start each bank loaded and wait for the range officer to give the command to fire and the clock starts.  If you haven't done so, go to nmlra.org and download the rule book and one of the shoot programs to find out more.