Gents
I am about to order a McMillan Cz-Express for my zkk602 in .375HH and wonder how much work is to be done when the stock arrives?
Will I need to bed the action, or put aluminum pillars?
I will order it with a F990 pad and sling studs installed.

Sincerely
Daniel

Just bed it. No need for pillars. When you get it, PM me and I will PM back some pictures of how to bed it strong and stress free.

LD

I have also bought a "drop-in" stock from McMillan for my CZ 550 Magnum in 416 Rigby. I do think you should consider relieving the stock just ever so slightly just behind the tang. I didn't and the paint (not the stock) shows two hairline cracks. You will want to correctly bed it.