870 choke hevi 13 #6

[Txag12]

Here are the pics of the 6 shots I took with the hevi 13 #6 3-1/2" loads














What would cause such high variability here? 1st, 2nd, and 3rd shot were with a dirty barrel without cleaning from patterning another load. After 3rd shot I cleaned it then shot the last 3. Also looking at my shot #6...I adjusted my sight to dial in the POI to POA with my red dot, POA is still a little lower than center of POI, would y'all leave it that way? I think it may be best as I typically aim at the wattles


I also think this is a decent pattern with the same load in a .670 Remington HD Extended choke