cragar said:ok I thought of another way . take a piece of foam board and place it 50 meters or so away , and aim at the top of the board then you can see where the bullet went through and you can measure this distance from the top and using d=1/2gt^2 you can calculate how much time it took the bullet to drop and then do s=d/t because you know the distance is 50 meters or how ever far you want to shoot it from , this may take some accurate shooting and a couple of trials but it should work.
cragar said:your friend wouldn't be standing next to the target he would be standing behind you ,
try this http://www.pyramydair.com/site/articles/formulas/ or google how to find muzzle velocity
Projectile speed, also known as initial velocity, is the speed at which an object is launched or thrown into motion.
Projectile speed is calculated by dividing the distance traveled by the time it took for the object to travel that distance. This can be represented by the formula: v = d/t, where v is the velocity, d is the distance, and t is the time.
Projectile speed is the initial velocity of an object, while average speed is the overall speed of an object over a certain distance or period of time. Average speed takes into account any changes in velocity, while projectile speed only represents the initial velocity.
The factors that affect projectile speed include the initial force or energy used to launch the object, air resistance, and gravity. Other factors such as air temperature and elevation can also have an impact on projectile speed.
There are several methods for measuring projectile speed, including using a radar gun, high-speed cameras, or measuring the distance and time manually. The most accurate method will depend on the specific experiment or situation.