I would like to take this time to THANK YOU for your knowledge and understanding. Your post back in Nov 29 2012 sent me looking in the right places. I've had cataract surgery on both eyes in Mar.2013. so I've been distracted from hand loading. The right place was Sierra Tech Support. How does a 5-shot group,that can be covered by DIME . At 100 yds from a bench. 63 gr SMP Sierra, 33.5 grs IMR 4064, 3290 fps. And that's a 1-14 twist barrel. Thank's to you & Joe King Clark6898 gun)