Irving_D: The best centerfire cartridge to come along in MANY decades is the 204 Ruger!
The best rimfire cartridge to come along in MANY decades is of course the 17 HMR!
Indeed the 22 Magnum is in steep decline.
I share your enthusiasm for the 17 HMR and seldom ever take out any of my various 22 Rimfire Magnum Rifles and pistols.
As far as I am concerned the 17 HMR has indeed COMPLETELY replaced the 22 Magnum.
Long live the 204 Ruger and the 17 HMR.
Hold into the wind
VarmintGuy
