Guys, when one speaks of the 577 having a pressure of 14 tons for the famed 750 @ 2050fps anyone know what the nominal barrel length is for this?
Obviously a 28" compared to a 23" is going to have some difference.
Also is there a standard length in double rifles?

Karl.

Standard for a 26" barrel I believe. Shortening the barrel will not affect pressure- only velocity.

That's what I meant, to get the 2050fps figure.
Thanks ganyana.

Karl.

Those would be British Long Tons also (2240)...

FWIW from quickload. max pressure, 35534 psi
577 NE 3", 750gn Woodleigh.
28"bbl 113gns RL15, 2056fps 35,513psi
24"bbl 1988fps.

23" bbl, 118gns RL15, 2050fps 39,923 psi