Sam, I have not even had a chance to shoot a 300 whizzum. Sad, eh? Maybe if I can find one in a Sako 85, that situation will change. (grin) BTW, I still like my 300RUM, in the rifle I own( a Remington LSS) the recoil, even with a 200gr/3200fps is not quite as bad as one might imagine.
"For joy of knowing what may not be known we take the golden road to Samarkand." James Elroy Flecker