Home Forums Hunting & Shooting Handguns Hunting with a 10mm?

In case there is any doubt:

Converting the 180gr .300 WM load you referenced above at 3,000 fps to metric units:

1 kilogram = 15,432.3584 grains. So there are 1/15,432.3584 kilograms per grain.
Thus, a 180gr .300 WM bullet has 180/15,432.3584 kilograms of mass = 0.0117 kgs.
Also 3,000 fps = 914.36 m/s.

Remember: Momentum = Mass (in kgs) x Velocity (in m/s) which translates to units of Newton x s OR (kg x m)/s.

For the 180gr/3,000fps .300 WM load referenced above, in metric units of momentum, you have:

0.0117 kgs (Mass) x 914.36 m/s (Velocity) = 10.665 (kg x m)/s (Newton x s). Exactly the same as you said above: �The 300 win mag with a 180 grain bullet at 3000 fps has 10.665 Newtons force.�

Only it is not �Newtons [of] force,� but Newton-seconds of Momentum.

You�re saying �Newtons of force,� but meaning �Newton-seconds of momentum.�