John,
My current bow is a few pounds heavier at 47#@29", but my arrows weigh in at 565g, giving me 12 grains per pound.
I have shot through 8 deer now with that setup, including a nice, mature 8 pointer this past Fall (even a blind pig...).
If I shot 40 yards and more, I suspect the shortcomings of this setup could come into play, but like you, my intended range is 20 yards and under, and I feel I have everything I need to hunt effectively and ethically.
Because of long term health problems, I am considering getting a bow that will be 41# at my draw. I will probably set up an arrow that is somewhere in that 12 grains per pound range. I still hope to shoot through deer with a sharp broadhead and good arrow placement.
All this is a longer way for saying I agree with the other counsel you have gotten here, and think you are going to do great and enjoy hunting with your new combo. Go get 'em, and enjoy the beauty of the woods!
Daryl