Given a fairly modern revolver chambered for .32 S&W LONG, reaming to .327 H&R Magnum is iffy, but not usually that dangerous. But to ream to .327 Federal Magnum is a whole different ball game. Unless you enjoy picking pieces of gun out of your eyes, don't do it.
As for reaming any of the old solid frame or break top gun chambered for .32 S&W, to anything else that would be a disaster looking for a place to happen. Even shooting .32 ACP in those guns (a common practice) is dangerous!
Jim
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