To explain why I do not favor metal bedding blocks or cross-bolts is fairly easy... the metal has a slick surface which is difficult to glue and keep glued because of the differences in thermal expansion rates in the metals versus the glue versus the stock material.
And then the stress from recoil while stressed.
Especially when there are products like Steelbed which gives the benefits of metal without the big thermal expansion differences.
Using an old Sako barreled action with the bedding block, 461 IIRC, and tried all sorts of stuff to make the bedding block remain attached to the bedding for any significant amount of time.
I consider them the answer to the question that either should never be asked or was asked and answered 50 years ago.
