Some of you may already know how to do this but a lot of people don't so here it goes:
1. Press 'A' on 'Multiplayer'
2. Go to 'Server Browser'
3. Next you'll see a list of all servers, to make life easier click on the right stick.
4. Now see a bunch parameters that can be either ticked on or ticked off.
5. Make sure that only Hardcore has an X next to it under Preset.
6. Press B and wait a second for the server list to refresh and there you go.
Also you can change the parameters to fit your needs. I live in the West Coast so I made sure 'West Coast Servers' have an X next to it. I find this to work better than the quickmatch, specially if you don't want a laggy game.
Hope it helps.