I had a plan that I could use 9mm brass to just bang away at the paper. But found that they didn't make targets that big, keyholing begins to occur at 10yds. The .357 cylinder works fine for .38/357 loads at all sizes and levels of performance.
The Load:
4.0gr Green dot
125gr Carrol RNL
WSP primers
Is a tack driver in my KAHR P9, and my Marlin Camp carbine.
Just a guess, but the bullets are probably undersized. My .357 convertible slugs about 0.359" across the grooves. It shoots jacketed 9mm OK, don't recall ever shooting any lead 9mm bullets in it.
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