Lol, an old way from SF (ijji's Soldier Front) that Tapping (unplugging modem then replugging) can make a Team Match go to 30 round (the max is 10) just by tapping - switching game mode from solo to team - press start - untap and the game starts with 30 rounds...
I'm not sure this would work but try this:
Tapping: Unplug/ Disconnect your modem from the internet so the game gets no information from your computer until reconnected.
Ok Try this sequence:
Start a game on Team Mode, Elimination mode, 140 kills
Have everyone ready up
Tap! (disconnect modem)
Change it to solo quickly
Press Ready (Start the game)
Untap! (Reconnect modem)
If this doesn't work, I have another Idea:
Go into a game with 140 kills and scan for 140, then go into another game with 100, and another with 70 (or what not), until you get a low number of addresses. Next Lock all addresses to 140 and start a game. (Note: try this in-game scanning first, then if it doesn't work try scanning in the Game room alone)