I have a S&W 19-4 357 I recently purchased. I get good groups with Remington and Winchester 38 special 130grs. Today I loaded up some 38 specials with 158gr LSWCs with Unique (4.2, 4.4 and 4.6 grain) to try them out. Roll crimped at the crimp groove. .... horrible groups, at 25 yards bullets were all over the paper.
I measured the cylinder throats with my Brown & Sharpe caliper … all are in the .354 to .357” range. I’m thinking the throats are too small, resulting in swaging of the bullets to a diameter too small for the barrel lands to engage the LSWCs. This is my first revolver, so I’ve never encounter this before. I never had a problem reloading LSWCs for my .45 1911s. Feedback/guidance would be appreciated.
I measured the cylinder throats with my Brown & Sharpe caliper … all are in the .354 to .357” range. I’m thinking the throats are too small, resulting in swaging of the bullets to a diameter too small for the barrel lands to engage the LSWCs. This is my first revolver, so I’ve never encounter this before. I never had a problem reloading LSWCs for my .45 1911s. Feedback/guidance would be appreciated.
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