Needsize,
Good routine. I will be box squatting tomorrow. My heaviest working set will be around 405lbs. It will look something like this:
1 x 5 - 135lbs (warm up sets do not count)
1 x 5 - 225lbs (warm up sets do not count)
1 x 5 - 275lbs
1 x 5 - 315lbs
1 x 5 - 335lbs
1 x 5 - 365lbs
1 x 3 - 405lbs
1 x 3 - 405lbs
1 x 5 - 225lbs (light cool down set, hips 3 inches below knees)
1 x 5 - 135lbs (light cool down set, hips 3 inches below knees)
Plus,
Wide stance leg presses, hip adductors, lying leg curls, and calves.