Looking through inventory a few days ago and found some Rem 6 1/2 srp primers . Can't remember when they were bought or why ......just to have ? Anyway,for some reason my mind ,memory is telling me , to beware and not use them in regular 223 pressure loads. Seems that I recall reading somewhere, that these primers are to be used in a lower pressure load ,ie 22 hornet loads and the like. Is my memory correct or failing me ?