Thread: .270 muzzle speed

Shooting for drops and working back to calculate muzzle velocity isn't a very precise method. 100fps difference in speed only results in about .1mil different drop at 300m with your bullet, a .1mil variation is more or less to be expected in the system given the noise and imprecision of the measurements you have to work with. Zero error, parallax, shooter error, wind, angle, temperature, humidity, pressure, uncertainty around actual POI centre at 300m, on and on