You're best keeping that spread, as you dont want to lose bulk to outspeed a threat that another teammate can handle. Some examples would be Jellicent, who you waste power or bulk on just to hit a ThunderPunch (if you are using that), and will still fail to OHKO, and thus get burned. Besides, Jelli also runs Speed EVs, so it's not even a guarantee. Scizor would be another great benchmark, but has Bullet Punch, which, after a Swords Dance Boost, you will NOT want to stay in.
Although an Adamant Nature is preferred over Jolly, if you have the patience to breed for one (another "perfect" Mawile), that is.