Man, that is an impressive hole there. Just a little different technique than I am used to reading about.
I think one of my downfalls is inconsistent cheek weld. The more I read, people really tend to lay into their cheek weld heavier than I do. I need to put a DE cheekpiece on my stock, and really get a good cheek weld. Seems like when I get a good cheek weld or much hand pressure, my groups start scattering now. Man I have a lot to learn!!!!!!!!!