I use nothing but small pistol magnum anymore in any small pistol I load. After tons of testing....there is virtually no variance between them on the chrony. The only issue that I've ever had is that some guns can't punch the harder cup...the only ones I've had a problem with are a few striker fired guns. All my "hammer" guns work fine. It's a lot easier to keep a good supply of one type of small pistol. That's my experience, your mileage will vary..........but I quit buying standard small pistol after my 2nd primer shortage....so I'd say I've been using 100% small pistol magnum for about 15 years now. That's in .32 ACP, 9mm, and 38 SPC. I do the same with large pistol, and small rifle. The only issue I've had with small rifle, my CZ527 in 300BLK would not punch a magnum primer to save it's life, but it also had a ton of problems and CZ ended up replacing the gun completely under warranty. I still keep both Large Rifle and Large Rifle Magnum on hand, but I don't worry so much about keeping 10 or 20K primers on hand for that, so it's not a big deal.