My brother was off to the side of me one day and got caught by the blast of my 243 which I load with very slow ball powder. He said that hurt.
Was at an event one time a run what ya brung and if it is Class 3 make sure you bring the papers.
I had in plugs, but the shock wave off the guy next to me's rifle was tryin' to take off my hat. It had a brake meant to pull the rifle some forward and it was funnelin' right to me till I moved. Caliber 375/50BMG
Also had plugs on the day some damned fool shot a 35/284, in an XP-100 under a cover