If you can use an Olympic style Tricep bar, it will offer a better gripping advantage and less stress on the wrist. Allowing a more natural hammer grip for tricep action (thumbs facing the shouders). Would not see the advantage of a cambered bar for any close grip work, except for the better range/stretch at the bottom. Maybe your using a different version than the regular standard style. But whatever get's you there, I guess. Good Luck.