About 30 years ago I bought a M52. It just didn't want to function with 2.7 gr of Bullseye. So I bumped it up to 3.0 and the gun was a whole new animal. Never even a hint of a problem.

The loads we see in manuals is the lowest load they recommend. It certainly isn't a pressure limit. There are lots of reasons to push too much, with leading being one of the big ones. I'd guess you could boost the load another half grain or more and no pressure signs would be seen.

I'd guess the real problem with loading 357s with wadcutters is you can't use them in 38s. If you want to replicate a specific 38 load, get a Chronograph and load to the same basic average velocity. You may see a slightly higher variation with the bigger case, but probably not enough to be significant, or cause an accuracy difference.

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Dick Burg