When I had my gun shop I used to install scopes and actually shoot the rifles to check zero (had 200yrd range behind the shop). The one rifle that I dreaded sighting in was my wife's 270 Rem 700 ADL with Aluminum Buttplate that her dad had given her, she wouldn't let me change a thing on it, that one really hurt and I was shooting 300WM and 358 Norma Mags at the time and they were just fine. I ended up buying her a Rem 760 in 270 to match her beloved 870 (she shot trap doubles and skeet with a pump you couldn't even see the pump move between shots)
AWS