Cupro-nickel plated steel jacketed bullets have been studied for decades by the US Army, and the findings have consistently shown that while initial wear on bores is more rapid than with gilding-metal-jacketed bullets the wear stabilizes quickly and barrel accuracy actually outlasts that of barrels fired exclusively with the supposed "better" bullets. If you do some research online, this info is not all that hard to find. I have fired hundreds of Silver Bear 62 gr. loads through my Axis and find that accuracy is quite decent,generally around 1.25" groups at 100 yards, with no signs whatsoever of excess pressure and excellent results on deer and coyotes.

What "everybody knows" and "everybody says" is often not based on any facts whatsoever, in the shooting world or anywhere else.