When I profiled mine I went from 5/8 to 3/4 and it felt great. I was originally on stock 10' radius and am now on quad .5 . The explanation I got was that with the quad profile you'll have more steel on the ice at any given time so you don't need as much bite with the hollow to get the same grip (disclaimer: I'm not an expert on the technical stuff, that's just the way it was explained to me and honestly the shallower hollow has not felt like it has any less bite than my old hollow on non profiled steel).