Be very careful doing this, because where your limbs bottom out may not be a good reference point. You could really mess up your Tiller length.

Trust me. I know from experience. I did this and it turned out my tiller was off by over 1/8" when my limbs were bottomed out, and I couldn't tune my bow for the life of me. I had to completely re-tune my bow after getting my tiller right, but it's nothing you cant' reverse.

If you're not comfortable re-tuning on your own, just mark a line on your limb nut to your limb so you can turn each nut exactly the same, if you do it right you may not have to do any additional tuning.

Also, I don't recomment turning you're bow up a lot at once, depending on your arrow set-up 63 lbs should be plenty for deer. Calculate your KE before you go increasing the draw weight, when you have to draw from an awkward position while hunting the extra weight could make you move a whole lot.