I went to the range today. I used Lightfield Slugs. I only tightened the barrel/mag. nut hand tight. I didn't shoot more then three shots per group. I wanted to shoot from a cold/cool barrel so I let it cool down after every three shot group.
I zeroed two inches high at 50 yards like Lightfield recommends. Once I got it zeroed it grouped great at 50 yards, a little over an inch. I fired a few round at 100 yards. The first few shots grouped about 4 inches. To be fair it was pretty windy. I really didn't think it would shoot that well in the wind.
As dumb as this sounds, I don't think my barrel likes to be dirty. I completely cleaned the gun last night. The first fifteen shots all shot pretty well. The last five didn't shoot that good. I really think this was because the barrel was getting dirty.
I'm a lot happier now then I was Sunday.