I'm really glad you started this post. I've shot with a measle ball in the past, but not really enough to notice a difference...then the other night I get on a 9 footer, am shooting a guy, shooting well, pretty much run him off. Then another guy walks up with a really nice high end Espiritu cue and asks to play. He brought his own measle ball. I win the first four games, then start losing. That ball felt like I was poking a bowling ball! The heaviest CB I've ever seen. I was sure it must be a bar box CB, but measured it with the other balls and it was close enough to be a standard CB. I hefted it with the red dot CB that came with the set on the table, and it felt at least 50% heavier. Damnedest thing I ever saw. The reaction between the OB and the measle ball was totally different than other CBs I normally run into, it tended to run faster after contact, tough for me to control. I'm sure some will come on here with proof it weighs the same, but I'll never believe it. Don't like it, no sir.