I feel it's a great tool and here's why.... I have a buddy that had shot at and missed 2 or 3 animals in his hunting career all under 200 yards. 2 years ago I took him out before the elk season and had him shoot my 300 WSM
; he put 5 shots in under 3/4" at 100 yards and I knew he had the ability to make some long range shots.
When the season opened we found a herd of elk feeding across the canyon around 400 yards away. I built him a quick shooting platform in the snow and had him get comfortable behind the rifle. He told me he was steady but didn't feel comfortable taking a shot that far when he'd never even killed an animal.
I pulled the shells out of the gun and told him to dry fire. The first dry fire would have probably resulted in a miss because he yanked the trigger. 3 more dry fires showed the cross hairs locked on target and he was ready to go. I loaded one shell in the rifle, gave him the wind call, and told him to send it. The gun barked and I watched the 185 grain Berger arc up and come right down into the middle of her shoulder and she simply fell down without even twitching.
The shot could not have been any more perfect, other than the scope split his nose open due to the angle of the shot hahaha. Without dry firing first, he would never have made that shot. Dry firing 3 consecutive times in a row and watching the cross hairs stay on target gave him the confidence to kill his first big game animal at a distance he thought was impossible to shoot.