Originally Posted by
cmynhier
Well, I don't know that I can claim experience, but I did notice something in both of your 310x4 videos. You're flipping hands after 3 reps, and then your 4th rep is really hard. Next time, try doing it without flipping hands just to see what happens. Maybe you're losing concentration, or maybe the bar is moving forward of your midfoot enough to make you miss the attempt.
This may not solve your problem, but it might be worth a try. (Of course, it's not really a valid experiment, because you may just be ready to hit 310x5.)
(At first I thought it might be that you're weaker with your hands in one position than in the other, but you start with a different hand under in the two videos, so that's not it.)