Nope, he was never boss. He was about to become boss, since Phil said he won't stand in his way, but he never became boss.
-I shot him a coupla' times. -What's a couple? -Hmm, more than a couple... Really I don't know the exact amount, maybe I shot him 10 times, 12 times? -Maybe fifteen? -Hmm, it could've been fifteen...