I shot 4 arrows today with it on, just before I had to go to work I shot 3 at 30 yards and ,,, they were getting close to destroying each other[:@] So I backed up to 40 and the last arrow slipped neatly into the group without hitting the others I was relieved that I didn't ruin any of my favorite X7's and also noticed that the bow seemed quieter. I'll do some more shooting with it soon