penetration now with a quality 180-grain bullet is probably as good as with the old 220s.
I remember a deer I shot with a 60's made X brands 180 grain bullet in 30-06. It acted like you would expect one of the newer exploding varmint bullets to do. Unbelievable damage from a thru the rib shot.
Not going blast the brand as they make some high quality bullets now days or so I read on here. But they are a major brand bullet maker.