If you're wondering how long you can leave a Barnett crossbow drawn, the answer is not very long at all. In fact, it's recommended that you only keep a crossbow drawn for as long as it takes to take your shot. This is because keeping a crossbow drawn for extended periods of time can put unnecessary stress on the bow and potentially damage it. So, if you're waiting for the perfect shot, make sure you don't wait too long or else you might not get another chance.