Ok guys here's the deal. Got a older h&r 12 ga slug gun with big bull barrel. bout a year ago it would not throw a group at all. So I took a long drill rod with a wire brush and brushed it out real good and it acted better. Now its doing it again 2 shots touching one shot misses 4 x8 piece of plywood. Any idea what's up. Its the barrel scope is tight shooting off lead sled. Has anyone else ever had this happen. I've always had a h&r since I started hunted. Any ideas on what to try next would be great.
