Hmm depends entirely on the situation. A loud NO alot of times is plenty, a swat if its a reoccuring behavior that isn't getting corrected with the vocal correction, a nose thump seems to be the quickest way to get thru to a stubborn dog. A raised knee for jumping dogs... a flat out beating?? No, especially not for behavior corrections.
Now years ago I had a wolf hybrid who was a gorgeous HUGE girl.. We did great until she hit the year mark.. I would correct with a light smack, she would snap at me, and I would smack a little harder, she would snap, and I would get a little harder until she would stop challenging me. That was the only way to make her understand that she wasn't going to rule the house. I haven't had that issue with any of my APBTs, ever. Once they realize that I will not allow certain behavior everything is golden...with the exception of a few that enjoy pushing my buttons..lmao