I have a Browning BAR 30-06 and my Leupold scope started giving me trouble. Since I was going to have to send it off I bought a Tasco like I have on my muzzle loader to put on it while the Leupold was getting fixxed. The Tasco impressed me on the Muzzle loader so I decided to give it a shot on here and then keep it as a spare scope when the Leupold gets back. Here is my question. I realized the barrel hadn't been cleaned in a long time on this as in probably 9 months or so. Maybe not quite that long but probably 100+ shots. It didn't look that dirty but still it hadn't been cleaned. Well when I put the Tasco scope on and sighted it in I got it pretty much dead on at 100 yards and was shooting within a 1/2" group. This is without a vice or anything so I decided I was happy with it. Well, it hadn't been cleaned at this time. I decided to run a wire brush through it today. My question is will it still shoot the same or do I need to go back and make sure that the scope is still dead on? I hate to miss a deer because of something like this but at the same time I don't see why it should shoot much different. I feel dumb for asking this but I'm sure someone on here can tell me.