Well I don't shoot ESP or any other sporting discipline BUT I am curious as to why anybody would miss more targets simple because they changed their choke? I am serious about this if you are missing more close targets it is because you are not shooting the gun in the right place not that the choke is wrong. I think you need to just settle down, sort your head and stick with the gun as it is. Serious question have you thought of putting in some practice on purely the close stuff that is worrying you ? Practice will help you get the shot on the target I am sure. As an experiment take your gun and shoot it a pattern plate at your close range then get a gun choked at 1/2 an try it on the plate ... if there is more than 6 inches in the effective diameter I will be surprised ... you are not telling me that this is going to make a difference to whether you hit or miss a target.