I've been doing a lot of front squatting lately since my back is having some issues and back squats are a big no-no. I used to use a hands-crossed grip similar to what you see most bodybuilders use. But lately I've been using an Olympic lifter's grip - hands shoulder width and elbows up high, "racking" the bar on my shoulders. I like the Olympic grip because it's easier to hold, but I have to drop the weight by about 20-30 lbs compared to if I cross my hands in front of me. Any idea what might be causing that? I would have expected to squat more since I'm more comfortable with the Olympic grip.