The only Barska I own is on a .220 swift, so far it's held up well, it's a 6.5x24.
As far as the "new" redfields, I used 2 on the 7x57s I built for my wifes grandsons for graduation presents (twins). Both are 2x7's & if I needed to replace one on one of my rifles these would get a real hard look.
May be a while though, I still have bout half a dozen "old" redfields for back up.