Hmmm.....Jerry Kuhnhausen (his Mauser book pg 108): "....receiver must rest solidly on steel: i.e., on the trigger guard housing receiver mount, at front...."
If metal to metal, how you gonna have solid pressure on the bedding? Solid metal to metal may leave looseness, metal to bedding. Makes no sense. I’ve bedded enough sub MOA Mausers to not buy into the metal to metal scenario. Not impressed with that statement.
DF
Dirtfarmer;
Top of the morning and Happy New Year to you sir, I hope the year's been kind to you thus far and this finds you well.
With the continued confession that I'm not a trained 'smith by any stretch, over the past 30 odd years I've bedded a good double handful of Mauser variants. Actually before pecking out this response, I scuttled downstairs and did a quick count in my repair log and it says 27 to date - so for sure not a whole bunch, but enough to form a semi-educated question.
As well as metal to metal having potential looseness in the action, I'd also suggest that it may be prone to not dampening the vibrations as efficiently as if there was some "crush" or compression.
Years ago when I used to shoot semi-formal hunting rifle bulls eye competition there were a couple of brothers from up the valley who used to bring down some state of the art equipment and were always very open to discussion as to where they were at and why.
They'd milled out one of the first aluminum stock inserts I'd ever seen - this a few years before the factories began to do it - but even then they believe that a thin wash of epoxy meant a perfect, skin tight fit and they also believed it led to better control of random vibrations.
Anyway sir, all that to say that Mauser variants running through my hobby shop get a gap between the steel of the receiver and bottom metal. As always, there's a lot of dirt roads leading to Mecca and that's just the one I've trod.
All the best to you folks in 2020.
Dwayne