"Until the really big blasters came along, the world champion meanest, nastiest revolver I had ever fired was a Model 58 (with the small stocks) firing Remington 210 gr. JSPs. I ran the risk of flinching one into the chronograph. 1410 FPS average of five at fifteen feet."

...have chronographed almost every factory made 210 grain load from a 4" barrel and not a one ever made 1300 fps... The Remington 210 JSP only runs 1250+- from a 4" barrel.

As to the number of current manufacturers of .41 Magnum ammo, take look over on the MidwayUSA ammo page for .41 and there are a ton of manufacturers of .41 ammo...and there are several more out there that are not listed.

Remington
Winchester
Federal
HSM
CorBon
Reed's
Georgia Arms
Underwood
Buffalo Bore
Grizzly
Hornady
Barnes
LAX
FREEDOM MUNITIONS
PMC
Double Tap

...and Reed's Ammo also makes .41 Special...

Weights run from 175 to 265 grain...if you get it done in that range, get a bigger gun...

Bob