I'm running that load in my SX3 with a old .690 Hastings and getting 320/270 patterns in the 10" and 20", with a .665 Indian Creek I was 400+ In the 10", all in what you want it to do. I don't use that shotgun much since I went to a 20 gauge 6 years ago but that is my experience with the Invector +barrels.