Glad to hear that you and your rifle are O.K. and that you've found the problem. As has been suggested by posters that have responded, vigilance is always first and foremost when reloading. Check and recheck, a checklist of reloading steps posted at your bench would serve as a reminder so no necessary step is overlooked. I have been reloading since the early 70's and while I have been fortunate to not have experienced and overload situation like yours I recently made an error about as bad. I had finished loading some pistol rounds using Unique, got up from the bench and dumped the Unique from the measure back into the container. Problem was that when I screwed the cap on I noticed that I had dumped the Unique into a container of Bullseye. The Bullseye became fertilizer for my garden, no way to separate the two. Good reminder to ALWAYS pay attention to what you're doing.
