Crossbow Bolts
While others say that it is necessary to stick to the recommended grain weight, there are people who suggest using a slightly heavier one. They say that when using heavier bolts, crossbows tend to move smoothly; but this will cost you some speed. Weird as it may seem, lighter bolts are the ones that may cause serious damage. Using underweight bolts might cause unwanted physical injuries if ever the bow fails to work properly. Take it for whatever it's worth be careful.