ATINATIN Ready Stock Chargeable Chronograph Ballistic Fixable Premium Precision Bullet Shooting Velocity Initial Velocimeter Black Durable

I absolutely love this product, CHEAP, simple and easy to use.It represents great value.Non English instructions, but so simple to use they are not required.Allows the user to establish the most efficient make and type of pellet to use in a particular gun.The product provides the Muzzle velocity in metres per second.Its so simple to calculate the pellet energy in JOULES, multiply half the mass of the pellet by the velocity squared.To convert Joules into FT.LBS divide by 1.35582I have recently purchased a Weihrauch HW100 PCP and did a comparison with my 40 year old Weihrauch HW80.I was surprised to discover that one particular pellet absorbed a substantial amount of energy of the springer, and manifested itself into a reduced muzzle velocity.

Too small

It works in mps .then you change it to fps