JJ, Clark points out what some will never come to know about AA#9. It is much more versatile than other Magnum powders. One of the most overlooked things I continue to see, is that even though we have cases of various capacity, most reloaders assume that magnum powder means suitable for any magnum cartridge. It doesn't work that way. Think about it. If we were talking about magnum rifle cartridges, would someone really try to sell you on the idea that there is one single powder that works best for all?
#9 is as close as you can get to the ideal burn rate for the .357 Magnum cartridge. Blue Dot was always my go-to powder previous to using #9. I don't know about #9 = X = Y = Z, #9 is manufactured in the Czech Republic, Ramshot Enforcer is manufactured in Belgium. I've put the question to the braintrust at Ramshot/Accurate; they are not the same powder. In fact, Enforcer could be the most undiscovered powder in existence!
I tries to educate, but peoples just don't seem to listen. This why an understanding of pressure and bulk density is paramount. I've pretty much given up. Do a thread. Ask what powder you should use in the .357. Overwhelmingly, the answers will be 2400, H110, W296 and even L'il Gun that is even slower that H110! Now, if 1250 FPS with a 158 gr. bullet from a 6" heavily constructed revolver excites you, fine and dandy, but if you really want to shoot a whitetail at 75 yards, 1500 FPS sounds a hell of a lot better to me: 242 Ft/lbs better! What they don't really tell you is that they may be a little more challenged in dealing with the recoil. Plain and simple.
A similar situation exists with primers. You can get a gazillion opinions, but what I've experienced in 25 + years of doing this, is that if you seat a CCI-500 correctly, which is .006" below the rim, and you don't have a mainspring issue, there isn't a more reliable primer. I agree with Mal. If you don't have CCIs, use the WSP. I use them almost interchangeably, but, I have had more failure to ignite issues with the WSP than I have with CCIs. Frankly, it surprisess me that guys that claim to have 88 years of experience handloading don't seem to know the correct seating depth of a primer. Must have missed issue # &$*^ of Reloader magazine. Check the archives on the subject and see how many have stated .006". It is a bit alarming!