I was figuring on 300 too. Not sure what is happening. I am going to clean the barrel again tonight and wait for the weather to warm back up some. It dropped to the 30's and windy today. The pattern was low on those targets, I moved the red dot again but didn't have time to fire it. There are a ton of shot low on that target in the breast below the 10 ring. I thought that target was a 10 and 20 ring and bought them. the outer ring is 15.
I am going to put up new cardboard and look at the pattern before I put a target on there. I have a truglo choke and the HD choke that came with it. My next option is going to order a sumtoy I guess. I need to try all the other options first though. I haven't cleaned that barrel this year and have ran 2 boxes of HVY Mag Blend, 2 HVY 13 and a handful of other junk I had laying around.