/b/sixpacksmackdown/posts/425x3-back-squat-pr(Please visit the site to view this video) 4-14-15 #SquatEveryDay I was able to work up to my heaviest triple to date in the back squat with 425x3. I then tried for a 1RM PR at 465 and failed. Back Squat: 225x5, 275x5, 315x5, 375x3, 425x3, 465 faileden-USTelligent Community 11 Non-Production