Indy: Interesting post....maybe D'Arcy can comment on some of your points.
No personal experiences myself since I have not had a Mauser converted to H&H length other than a Whitworth....but I know that lower recoil abutment thing on lengthened M98's has been a subject of conversation for years.
Note that lots of the emphasis here seems directed toward M70's...and I know d'Arcy likes to work with the Classic,which is a bit different than a converted M98.
In any event, this strikes me as being a low pressure round(?)Any thoughts on that?