I think that there is such thing as too much shooting. I know if i stand there and shoot arrow after arrow i lose my focus after awhile. Instead of keeping my form and focusing on burning the pin into the spot i want to hit, after awhile i am just mindlessly flinging arrows at the target. Also shooting that many arrows at once you might tire yourself out and your shooting will suffer. You might be better off shooting everyday but shooting ten, very deliberate, focused shots. I try to shoot as much as i can year round, but once deer season starts getting closer I might only shoot a couple arrows a day. That way i put a little pressure on myself to make a good shot, after all you are likely to only get one shot at that deer. But practice is a personal thing and do what works for you and what makes you comfortable.