Hi guys this is my first post.Great site, my BC opens when shooting. I was loading 500gr cast bullets over 14.8gr of unique with 5/8" square dacron 1/4" thick as filler. When shooting 300gr cast bullets with 34gr of 3031 it was fine. Now it opens all the time. I may have done some damage to it. I tried a search but could not find anything. My question is, what do i do now? Thank you YNOT