For full power 357 Magnum loads, I use W296/H110 with jacketed bullets exclusively.
For lighter loads, cast bullets and Unique, W231 or Accurate #5.
2400 and IMR4227 never lit my life on fire but I have not used either since 2400 was a Hercules product. If I could not get any W296/H110, I'd try something else. I've never had bad experience with either.
I have no experience with Accurate #9.
I usually have a good supply of W296/H110 on hand at most times and use it in a number of different cartridges.
For lighter loads, cast bullets and Unique, W231 or Accurate #5.
2400 and IMR4227 never lit my life on fire but I have not used either since 2400 was a Hercules product. If I could not get any W296/H110, I'd try something else. I've never had bad experience with either.
I have no experience with Accurate #9.
I usually have a good supply of W296/H110 on hand at most times and use it in a number of different cartridges.