D no not know Tom - but at some time in the 71's future, the Mauser Brothers Changed to a double recoil lug in the model 71. Perhaps this was then called the model 72, preceding the 88.

There was a 71/84, which went to a .446" groove diameter from the previous .454" to .457" in the .43 Mauser.

The switch to a 7mm on the basic 71 action is rather gutsy.

Does kinda look like a cross between the 71 and 88, doesn't it?

The 60mm case leads me to believe they necked down the .43 Mauser case, which has similar case diameter dimensions (but with rim, of course) to the standard magnum case of the H&H case without a belt.

I actually made some .43 Mauser cases with H&H brass, belts turned off. Of course, extraction was iffy.