Wow, that is an extreme case of vertical stringing. And usually indictitive of bedding or pressure on the barrel. But if other loads do not do this, I am not sure what to tell you. I would go back to the other load to make sure. Everytime something strange happens like this, usually my scope has came loose or action screws.

I found BL-C with max load of 30.7gr with 32gr ballistic tip gives me .7MOA all day. Thats with a remington bench primer. I was pleasently surprised that max load worked best at 4020fps.