Specification
The numbers that define it
Factory loads
Published load data
Muzzle velocities are the manufacturer’s published figures, measured in their test barrel. Your rifle will differ — a shorter barrel typically loses roughly 5–15 m/s per centimetre. Chronograph your own load before trusting a long-range solution.
What it is
The .300 Winchester Magnum pushes the same bullets as a .30-06, but 50–60 m/s faster. That shows as a flatter trajectory and more retained energy — and it shows on your shoulder. At long range in open country the difference is real; at forest distances you pay for it for nothing.
Use in Finland
Every load listed clears the top-class 2700 J / 9 g requirement by over a thousand joules. In practice the .300 WM gets picked in Finland for field hunting and open bogs where distances stretch — the calculator shows how much flatter the trajectory really is.