If it makes you feel any better I only did 315x2 tonight on deads... but i didnt use chalk usually i bang out 455x2
the only things I ever really use chalk on is if Im gonna do hook grip on something, or for dips and one arm rows. Thats because the dumbell on the rows slides around if I dont use chalk and the dip bars are rubber coated so even a little sweat and it becomes slippery. I never use chalk on deadlifts...