Well, historically in 38spl I was a big fan of the 358477 over 4.2gr of Unique. It has proven to be a very accurate load for me. And for target work, the H&G #50 (or Lyman 358495) over 3.0gr of Bullseye with only one lube groove lubed. Those two loads are superbly accurate in my guns.
However, after finally shoot up the remainder of my loaded ammo I decided to venture out and see what else I could play with. One thing I have gone back to is the 358311 over 4.0gr of Unique. This is an accurate, and mild recoiling, load that I find pleasant to shoot even in my air-weight like Taurus 85. I think I may bump up the charge to 4.2gr, but the first go with 4.0 made me happy. The other thing I've been playing with is the MP357-125-HP with Penta pins over 5.0gr of Unique. So far I'm just in the testing phase, and I'm using the data for the RCBS 125gr TC, but I'm liking it. It is very accurate in my S&W 65. Surprisingly, this seems to be a little on the hotter end. Going off memory (since I'm do not have my manual next to me) I think the Lyman data goes up towards around 5.7gr max.
But if you want to see some REALLY HOT loads, go check out the data starting on page 129 of the
44th Edition Lyman manual. THAT is some hot loads. The modern Lyman load for the 358242 120gr bullet tops out at 5.7gr of Unique for 1012fps. That old Lyman 44th Edition listed a 358242 up to 6.9gr of Unique for 1132 FPS, which is also their recommended load for accuracy (the max load that is). And up to 12.5gr of 2400 for 1120 FPS. I have no idea of Unique or 2400 have been reformulated over the years since the 44th was released. But I'll say this, that sounds like some very capable loads. If one were to work these up they might want to do so in a 357mag.....