Seems to use certain distance intervals as well, but no idea how big the interval is.

Rolling Boulder is supposed to roll for up to 800/1600 (1000/1800 when having Aether Lens).

But instead it rolls for 799.999/1570.999 (986.666/1786.666), so it misses 0.001/29.001 (13.333/13.333) range.

Aether Lens also doesn't increase it by 200, but by 186.666/215.666