The musket actually had a greater range than the longbow, if used in indirect fire; Hardy and Strickland gloss over this point in Great Warbow, and compare the direct fire range of the gun with the indirect range of the bow, not like with like.   Supplies of suitable bowstaves also began to dwindle, making the longbow no longer a cheaply available weapon for the masses.   It is also true that as armours improved and longbows had to have a greater draw-weight to achieve penetration, accuracy dropped off greatly - which is why the bows for target shooting that 19th century writers based their studies on  did not exceed 50 to 70 lbs draw or so.   Lastly, there would come a point where the draw-weight needed to achieve penetration exceeded that which an archer could manage.   Crossbows and muskets had no such problems, though they did have others.   All of these other factors are covered in Hardy and Strickland.[December 11 2005]  