A good while back, when primers were actually very cheap, I picked up some Remington 650 SRPs just because I wasn't paying attention. They worked out fine in my .222, but I learned that they were intended for lower pressure cartridges like the .22 Hornet, and had thinner cups that could potentially blow out with the higher pressure of a modern cartridge.
When i learned about this I was well into one brick of them, and had an unopened brick that I gave to a guy that loaded for the Hornet. I still notice that partial brick of 650s from time to time, and occasionally have thought about acquiring a hornet to use them. Thinking now they'd be my substitute of choice for .38/.357 primers...
And there's still the little matter of the Hornet... Liking the 77/22 for that....
