I just started doing some reloading for a Taurus 454. So far I've tried Hornady 250 JHP-XTP with AA #9 and with either CCI SR (400)or CCI SRM (450) my best 50 yard group is about 6-7 onches ( didn't measure 'cause I wsn't happy) I've loaded some with 2400 but they haven't been to the range yet. Any suggestions?? I'd like to shrink them to about half that size ... if possible.