Quote:
Originally Posted by Bruce Lee M
While over pressure signs can be misleading or non existent there is one sure way to find out.
You must chronograph your loads. The velocity reading will be the best way to find out if you're exceeding the working parameters of the cartridge.
When your .38 Special loads are clocking as fast as the known velocity of the .357 then you know that the pressure is too high.
Anything else is just guess work based on observations of fired cases.
BLM
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Measuring velocity is good, but not a tell-all. , The two don't necessarily have a linear relationship.
If you're wanting to duplicate some Keith loads, I suggest they only be used in .357s,
I've shot Skeeter Skeltons load quite a bit. It's basically a magnum in a .38 special case, but only for use in a .357.
I did flatten primers once in a .357 using a max charge of 296 (per the Speer manual of the day, which said don't reduce a ball powder load.). The report sounded like a high-power rifle.
BTW, extraction was still easy.