The .405 WCF with 300 grain bullets does seem to be good for any American big game. Handloaded 300 grain North Fork, Barnes, etc bullets make it even better.
Below, a 300 pound Red deer cow taken with 300 grain Barnes from Simson Suhl .405 DR:

Or for added punch for really large and dangerous game, the 400 grain Woodleigh at 2080 fps:

My 400 grain hand loads run the same in both rifles, the 1895 .405 and the Simson .405.