1.5" groups with either surplus or the Dominion ammo (which shoots the same as surplus, in my experience). Slightly better with good brass cased ammo. Mine is one of the Manlicher stock M85's, not the ones from CanAm. The Manlicher M85's have an 18" bbl, as opposed to the 20" bbl for the standards (CanAm). There's some other minor differences too, which make me think that the Manlichers are, in general, more of a "Lux" option with better fit and finish overall.
I only have this one pic from shooting groups. Other than the obvious flyer (shooter error), the target on the left is fairly typical of what I get from my M85.
As for chrome lined, corrosive ammo, blasting through a crate in a weekend...
Not chrome lined. So what. Clean your rifle (which you should be doing anyway). It's a bolt gun so cleaning is easy.
Blasting through a crate in a weekend... Not the worlds smoothest bolt, TBH, you'll get kind of tired. But other than that, it should be no problem.
Cheers.