My dad was drafted in '43 (bad eyes, bad back, and he worked in a steel mill where they produced Sherman tank parts- yep! they were getting desperate)
Anyway he always tried to teach me to shoot with my right hand thumb lying along side the stock, and not over the wrist. At 6'2" dad was the tallest guy in his outfit and in training got the fattest lip. That's because the oh-3's stock was/is on the short side. Of course, at 5'8" I don't have a problem.
I recall insisting on wrapping my thumb over the wrist and the first time I shot dad's customized deer rifle, a .270 that the stock had been made for my dad. He said "go ahead, you'll regret it." But knowing that the stock was made for him and my being shorter, (probably about 5'5" or 6" at that time) I was going to clear completely. I recall big grinning my pristine, unsplit lip at him after shooting. Gads! I was such a smart A. I truly deserve my #2 son who is as bad or worse than I ever was that way.(to #2 son I say-
for all the good it does either of us.
)
Concerning Mauser stocks, I find the Yugomodel 1924 or 24/47 the most comfortable. (refurb sanding has considerably slimmed the stocks of many of these with original stocks.)