This ammunition is hard to find.  Same is true for its components.  So we tooled up to make the brass cartridge cases out of 357 magnum brass.  After ruining a pound or two of brass, we got it down.  We test chambered several random samples and found they're identical to factory made 22 Jet cases, except the head-stamp still reads 357 mag.  As with all our premium cartridges, these are meticulously hand loaded on single stage presses with each powder charge weighed individually to within 1/10 grain for consistent performance.  These are intended for varmint hunting or range plinking, not for big game or personal defense.  We are a custom loading company.  If you're looking for more than what we show we have on hand, or want something we don't list, please contact us at hpccc@outlook.com.  We may have components here to make what you want.