Today I am going to tell you how to make the private match EXP glitch
1.Get your friend to invite you to a player match
2.Tell your friend to switch lobbies to combat training
3.Go to edit game options and put the score to 30,000 and time to unlimited
4.When he is done tell him to back out and you will get a message "The party is no longer active"
5.Invite your friend back to your lobby that you are in.
6.Switch the lobby to wager match then quickly switch the lobby to player match
7.If you done it right it will be you and your friend in a lobby with nobody else
8.The match will start up on nuketown.
P.S. you will have to go to the main menu ever time you do it.
Hope this helps.