RE: Follow Up Shot Size?
I stay with the load my shotgun shoot the best... for first shot, and any follow shot that may be needed.... which it won't be IF you're using Hevi13. lol!
Based on any testing we've done, the 3", 2oz., #6 is THE best patterning Hev-Shot load in all of our guns we've fed it through.
Good luck and good shootin'