A year ago I went to the range and returned home to a Divorce. I didn't clean out my barrel and the gun sat in the safe since, which is in her house. I got the gun last week. Looked at it today and it's pitted from the breach to about 5 inches from the muzzle. UGH! I cleaned it as thoroughly as I could. I went to the range today and shot it about 20 times. My best load gave me 1 inch, 4 shot groups at 100 yards. Today, the best I could muster is 4 shots in 3 inches. This is still respectable for a hunting rifle. I guess I'm just wondering how the pitting will affect the accuracy over time. If I clean it like I normally did, should I expect the 3 inch groups for a while or will it degrade quickly? I didn't see any sabot material while swabbing between shots.
Please keep bashing to a minimum as I already feel terrible.

I guess the silver lining could be my need to buy a new barrel.