From Buffalo Bore's site, regarding their 357 mag ammo:

18.5 inch Marlin 1894

a. Item 19A/20-180gr. Hard Cast = 1851 fps
b. Item 19B/20-170gr. JHC = 1860 fps
c. Item 19C/20-158gr. Speer Uni Core = 2153 fps
d. Item 19D/20-125gr. Speer Uni Core = 2298 fps

And a worthy read...

357 Magnums

1935 - Major Douglas Wesson

* Antelope - 200 yards (2 shots)
* Elk - 130 yards (1 shot)
* Moose - 100 yards (1 shot)
* Grizzly Bear - 135 yards (1 shot)

Better hunters than I ever hope to be have used it to harvest some pretty tough game.

Plink