Equip it and have a stone in your inventory. Select the "shoot" option under the combat menu and click on your target. A bar will appear. The higher it goes, the better your chance to hit. Click again to shoot.
Having high Marksmanship makes the bar rise faster.
Lamp wrote:Even though it's 12:40 AM now, I'm still staying awake until server goes back up, and once it does and I can play again, I'm going to enjoy every damn minute of it ಠ_ಠ