I think that lots of times shooters get a bit stale shooting at large targets, myself included. For myself, the temptation to worry more about form is almost a precondition when shooting at my large backyard target, since most of my shots in my backyard are shots when I am working on aspects of my form, thinking about aspects of one's form detracts from aiming at a specific tiny thing more often than not. Now, if I can get a trusting buddy with a pocket full of change to toss it across that large double target it becomes a totally different deal.