Re: Oak sticks - bad for your hand?
As mentioned, the oak is denser and therefore heavier, so with those heavier sticks of yours, any improper technique will be more likely to be less forgiving. I use Pro Mark 5A nylon tipped oak sticks, and have no issue with them. Try something else, and see how it works out for you. The problem might be the size of the stick even. Try downsizing stick size, or trying something new.
Cheers, and good luck!
"God is dead." - Nietzsche, 1882
"Nietzsche is dead." - God, 1900