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Old 02-17-2017, 01:12 PM
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murphydog murphydog is offline
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Welcome! Unless you are restricted to one load, I would suggest trying different bullet weights and velocities before altering the front sight. Since the model 640 is still being produced you may also ask the factory for which load the sights are regulated. Hope this is helpful and thanks for your service!
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Alan
SWCA LM 2023, SWHF 220
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