I have used it successfully when helpding boyscouts meet the minimum requiremetn for the shotgun badge. Some boys (despite age) can't hold the SG for 50 shots and when they are one or two shots from failing the test, I have asked thme to visualize the target and to get mad at it and really want to hit it. It works all the time but only as a last resort. One kid told me he pictured a school bully he hated, then he nailed the taget after about 20 straight misses.. While not entirely scout like, it worked for him. Yes, i did tell him gun violence is not a good thing!
Funny you should ask this question. When I am happy and relaxed and shooting with friends, I don't shoot as well as when someone against whom I'm competing has pissed me off. If they have made me angry, they are going to lose.
As mentioned above shooting mad can be pretty productive for short time frames.
What many people don't realize that the mad state of mind, takes a lot energy and concentration. Its really hard to stay "mad" for an entire day of shooting. One will end up being totally exhausted much earlier than normal and see a drop off over the course of the day.
Try staying mad for a weekend or longer. Been there, done it, and lost in the long run because of it. Its much harder than shooters think.
With that being said sometimes it depends on the individual. Some people are just a "walking dark cloud" in their everyday life... being grumpy for them is easy and normal. Not much fun to shoot around but who knows maybe it will work great for those types. A friend who is like that has yet to make the hurdle to the next level using the "mad" technique, but if he does... I will repost here.
I had a "Hall of Fame" shooter tell me once in the early 80's, when we were talking about getting Mad at the targets, "Show me a shooter that doesn't get Mad and I will show you a shooter that never wins".
Personally, (am I entitled to my own opinion here?) I think the big dogs don't get mad when they miss. They can't afford to. If you miss and you are mad and thinking about that miss, you will more than likely miss the next one also. It's called negative thoughts.
Quit thinking about this that and the next thing and you will definitely shoot better.
JMHO....nothing more Nothing less.
and who the hell am I, to tell anyone here how to shoot?