[nightdriver]

"Parker-Hale M85 (German) This site gives us the muzzle velocity of the M85 as 1,160 m/s."

I think that 1,160 figure refers to the overall length of the weapon in millimeters. The muzzle velocity appears to be the 810 figure in meters/sec.

[Black Powder]

I think that 1,160 figure refers to the overall length of the weapon in millimeters. The muzzle velocity appears to be the 810 figure in meters/sec.

What the website says in German is 810 to 1,160 m/s depending on the weight of the projectile.

Since one meter is slightly larger than yard, we can multiple by three and roughly estimate the maximum velocity to be 3480 feet/sec.