That pic by Two Dot looks a lot like my NEI #169A mould form. At the old site, "OKSMLE" did a group mould buy on some samples I sent to him from one of Walt Melander's mould blocks that I have. 202 grains in pure lead, and even at the low speeds of the 38/200 it still CLANGS downrange iron right proper.
That #358430 does a similar job in 38 Special (700 FPS at standard pressures), and REALLY whacks stuff from the 357 Mag at 1200 FPS. (12.4 grains of WW-296, right from the W-W data). VERY accurate, cast that as a Bruce B Soft Point and go make venison.