Up to 3 hits

My Act 7 was already rank 1 before the nerf I think, I don't remember, but before that it has been hitting four times at lower ranks. But, I don't think rank has anything to do with this since its charge range or its linear path doesn't change one bit.

And it works for both. It might work more with Colossus (which I use more due to that crappy Act 2 with Pierrot), since it probably has a bigger range due to its size (though I'm not sure if its size actually has any effect on its hitbox).