my brother just bought a new T/C Venture 30-06 rifle. we are considering using IMR4064 powder, with a 165 grain bullet for Michigan white tailed deer. is this powder temperature sensitive? and can it be reduced beyond the 10 starting load? he is going to have shoulder surgery AGAIN, and at this point, they are considering using at least some artificial parts. so he will have to take it easy for a while.