Maybe you can have two ´modes´ one being misfire and accurate.
You would take a stat for archers and have it be the accuracy chance, for example, if the stat was dex. and my archer had 16 dex. then before they shoot, they get a number 1-100 (or something else for balance reasons.) , and if it's within 1-16 (16 from my dex. stat.) the shot is accurate. (i think you should have the shot go straight or you could have it shot into the sky and come down like lightning).
If the number drawn were to be 17-100 it would fire how it currently does and call it a misfire, since it is very inaccurate, or do stuff how you want to I'm just here from a player standpoint.