The search feature is your friend. Unfortunately there is little that can be done to improve your reading comprehension or, apparently, your lack of good memory.
I remember you frothing at the mouth over a cartridge with no future life and little practical advantage.
Was I wrong?
Yes. It only happened in your imagination.
That's weird because you posted a link to a thread where you were doing just that.
I hope your kids figure it out soon and call the men in white coats to come pick you up.
What I wrote in that thread is called 'damning with faint praise'. Big difference from 'gushing' or 'frothing at the mouth' but I really don't expect you to get the difference.
What interests me about the .338RCM is the performance from the 20" Ruger package. Being a handloader the, if I were to purchase one I'd also buy a lifetime supply of brass, as I've recommended to others. Any non-handloader that buys one needs to know that ammo could be a big problem.
But, even though I handload, I haven't purchased one because of multiple problems, with brass availability and cost being a big one but reduced performance from the .338WM being another. According to Hodgdon data, a 24" barreled .338RCM would get 100fps less than my 22" .338WM. A 20" barrel on the .338RCM would probably lose 200fps or more. Not really what I'm looking for.