Yes, you can shoot 11/32" pine out of 70 or 80 lb bows if you choose the stiffest spine. But, that pine arrow will very probably break if it hits anything other than a target boss or soft ground. I shoot bows of around 70 lb on field courses. When I used 11/32" or 23/64" pine, spruce or cedar I used to break about one arrow a week, often from glancing off a 3D target or overhanging branch. With 3/8" poplar, I used to break one every couple of months or so. With 3/8" ash, I break one a year at most, usually when it hits a reinforcing bar in a 3D target. If you want maximum speed, go for spruce. If you want maximum durability, go for hardwoods such as ash or birch in 3/8" or 10 mm. For a really strong heavy arrow go for maple.