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Originally Posted by Jeron Kahyar
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The best thing I ever did was buy a CZ 527 Kevlar, in 19 Badger, from Jim. The next best thing I did was learn as much as I could from this man via this and other articles, talking to him on the phone and picking up components in person at his shop. It was what eventually led to me developing my own wildcat cartridges and the methods I use to Develop Good Safe Loads for them. These methods work well Saami cartridges as well.
Just remember that the 17 Hornet case was designed to run at 50,000 PSI Max which is why the small rifle primers, designed for 40,000PSI, come up short and peirce. More important is to remember that the ones designed for 55,000 PSI cases, especially the CCI 450 Magnum, will not show pressure signs until well past the pressure that the 17 H case will tolerate. That is also why it is possible to determine when pressures exceed the 57,000 PSI that 223cases were designed for. Get a micrometer, measure the base of a new case, and make certain that that measurement falls somewhere in between Saami Max Cartridge base diameter (0.2982") and where the Hornady FL die sizes the base (0.2973" with the die I had) without bumping the shoulder. You will have no pressure problems and the brass will last a long time.