Good information above. In deference to its age (and lack of later 20th century heat treatment of the cylinder), it is probably best to restrict this fine old revolver to standard pressure .38 Special. I see a Bianchi Speed Strip with jacketed .38 Special in photo 1 which is fine if not + P (or the dreaded + P +). Enjoy and be safe out there!

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Alan
SWCA LM 2023, SWHF 220