I have a FN Mauser in .458 Win Mag that has a stiff bolt on closing. It slides back and forth like butter, but when closing down the bolt it is difficult to do with the buttstock still on the shoulder. Sometimes it even seems to hang up and the bolt has to be pushed forward with a fair amount of force before pushing it down.
I know it's not supposed to be babied when working the bolt, but it's stiff enough that I can't do it from the shoulder on a regular basis. Bringing the gun down from the shoulder gives me enough leverage to close the bolt down fairly easily. I compare this gun to my Kimber Montana which can be closed with the flick of a few fingers and wonder why the Mauser isn't the same.