Feather,
There is a big difference between your bow and a rifle. As long as you have some arrow lenth left the string is putting presure on the arrow at a rate higher than that of the drag. BUT, in a rifle with a long barrel and a lite charge of fast burning powder the powder will be spent in the first few inches on the barrel and the presure will fall off fast and befor the bullet gets to the end of the barrel the drag of the bullet against the barrel will be greater the the force of the presure pushing the bullet. Now if that don`t make it clear as mud I give up.
