If the powder didn't make a difference, my next move was to get a new scope Mike. The gun and Nikon scope are about 10 years old, and that's quite a few shots. I had it bore sighted a few months ago, and the guy at the gun shop told me it wasn't that far off. The gun will definately have a new scope on it next season. I'm going to shoot it again tomorrow to make sure that one 10 ring shot wasn't a "fluke".