That is not my experience. So far I've shot around 150 rounds and there's barely a hint of erosion at the very corner of the bore at the front edge of the chamber, a long way from the lands. The rifle also puts 5 rounds (not three) into much less than an inch with its favored loads.

“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.”
John Steinbeck