Can't help with the handloading but the 52-2, according to SCSW was an improved version of the Model 52-1 with a more efficient extractor system. Introduced in 1971. Features an adjustable trigger stop, serrated hammer, and a counterweight was offered as an accessory. Produced 1971-1993. The Model 52 came with a 5" barrel with a 5 shot magazine. Adjustable rear sight for windage and elevation. Bright blue finish, checkered walnut grips with S&W monograms. Shipped with two magazines, barrel bushing wrench, screw driver, instruction sheet and cleaning kit. Serial range begins at 50,000. Course with certain autoloaders, starting in 1970, serial numbers begin with the "A" prefix. Certain models have an "A" suffix.

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Model 36, 39-2