http://hopeisstrength.com You can learn how to squat more weight by using bands and the dynamic method. Try 50-60% of your 1RM plus bands for 8-12 sets of 2-3 reps. My 1RM was 365, so I used light bands.
http://HOPEisSTRENGTH.com My first time trying to learn how to box squat with the giant cambered bar. This squat is harder on the lower back because the weights and center of gravity are lower than usual.