Jeep, the detonation issue was also present in .38 Special cases.
The "wadcutters in .357 cases" wasn't that prevalent; a lot of folks, like me, tried it and discovered the drawbacks out-weighed the advantages.
OTOH, loading Speer hollow base wadcutters backwards, over a healthy charge of Unique or 230P (pre-cursor to 231), WAS quite prevalent in some circles; in both .38 and .357 brass.
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