What can I expect for pattern out of my 870 with a 26" barrel, Jellyhead .665 & Hevi13 3/2/7's? I just bought the JH and have never shot the Hevi13 before. I went this route after reading a LOT of threads on here. Now the more I read, I'm wondering if I should have went with the .660 instead of the .665 OR 6's instead of 7's. I know I'll need to shoot it to see what pattern I get, but just wondering what to expect.