Re: B&C Medalist for #4 contour
I've used two of these stocks on Win 70 short actions builds so far, one a 25-284 and the other was a 284. The barrels were #3-#4 fluted contour and both fit the barrel channels no problem. I think a #5 would be no problem as well as I don't remember sanding much if any out of the channel for my two.
As an aside, when you get around to fitting that action in the stock, it will take a little work getting the magazine box to set in the inlet correctly. I believe I had to mill a bit of the bottom metal (underside) and also the mag box to prevent binding between the action, bottom metal and mag box. Make sure you get the receiver/bottom metal inlet properly as the action screw holes won't quite be in the right location...it will take a little messing around.