Do you have to cut off arrows for a traditional bow?

Yes. Traditional bows require a half-inch by half-inch arrow cut, plus a 25-grain arrow change, if you want to match the perfect arrow, which is a bit of a toss-up. If you have the means to do so, and have room for upgrades, you can make the arrows a little longer, a little stiffer, a little heavier, and still have room to change arrows and cut them off when you upgrade later.