I noticed that when you play a custom game either with other online players or simply playing split screen with friends off of one xbox, the BR takes 5 shots to kill instead of 4.
This is horrible. Please somebody from the great 343 Industries help.
Duplicate thread in the Halo 4 forum:
https://forums.halowaypoint.com/yaf_postst227718_BR-is-a-5-shot-kill-in-custom-games.aspx