One of my all time favorite loads for my .357 for target shooting is 162 gr LCSWC (straight wheel weight) with 15 gr WW296 powder. I shot with and without gas check and didn't seem to make much difference in accuracy or leading of the barrel. The 162 grain LCSWC bullet is an RCBS mold w/gas check .
I also loaded 12.5 gr of 2400 powder behind the same bullet and it is accurate, but seemed to always be dirtier.
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James
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