The tournament classes where I did most of my competition shooting didn't allow levels on the sight. Didn't even allow pin guards in those days. So I was never in a position to begin relying on either one. Now I feel like they are just extra distractions you don't need. Especially when your palms are sweaty, your heart is pumping in your throat and you're doing your level best to keep your shaking knees from dumping you out of your treestand, all the while trying to aim at that deer.