I'm thinking of trying the Hornady .40 caliber XTP 180grHP in my 401 Powermag. Do these bullets have a cannelure? Are there any other .40cal handgun bullets with a cannelure? If they don't have a cannelure and aren't crimped will they stay seated with recoil? My dies are old original Herters dies, should I try to crimp if there is no cannelure?