Hoping to get some input regarding what others are typically finding as far as case longevity. My brass is showing signs of Head separation after reloading 7 to 8 times. I push my 250 scenars about 3020fps which requires 96.5 grs retumbo. my case prep is meticulous, will check headspace again. Lapua's Shooting and Reloading manual states" cases can be reloaded at least 10 times", mine are separating. Any input would greatly help.