Anyone can be bitten or stung by an insect, and bites and stings are very common. Youâre at greater risk if you spend a lot of time outdoors, especially in rural or wooded locations. Children and older adults may have more severe reactions to bites and stings.
60 feet divided by this number should be the arrow's speed in feet per second. Double the distance from the masking tape to the center of the 40 yard grouping, and divide by 32 feet per second per second.20 feet divided by this number is the arrow's speed in feet per second, and should be the approximately same as the result in step 6, allowing for errors in measurement.
Knowing how your arrow speed changes with the increase in arrow weight, you can now easily figure out the new kinetic energy: For instance, if you know your crossbow shoots your current 400 grain arrows with a speed of 400 FPS, our chart above tells you to expect 124.8 ft-lb of kinetic energy at 30 yards.