Question on 20 ga. Mossberg 500 chokes

[Extremesolo]

Last year I set up a gun for my son and I to both use.  It was a 500C that I installed an ATI talon stock and also a burris speed dot red dot scope on it.  I have an unported .582 undertaker XT in it currently but also patterned a pure gold .555 in it as well.  I have shot Federal HW #7 as well as Hevi #7 and Hevi #6.  I would have to check again to get my actual numbers from these loads but I believe they were in the 110-120 at a lasered 40 yards.  I have been looking for a tightwad and an unported .575 undertaker to try as well.  I enjoy patterning but don't really want to waste money when I don't need to.  I see trulock and sumtoy as well as indian creek chokes mentioned often regarding great patterns from these 20's.  I would like to be in the 130-140 range if possible.  How would you rank the available chokes regarding 40 yard performance from a Mossberg 500 and which would you recommend? 

[rutnstrut]

Carlsons choke and hw 7's. 150s at 40 yards

[cohuttariverrat]

Last year I got me a bantam 20 mossberg cause Im 5'7 and it shoulders well and LOP is perfect for me. I ran all kind of loads through it with both ported tightwad and unported undertaker. Tried lead for the heck of it, hevi mag blends, win xtend range, and fed 6's and 7's. The setup my gun liked the most was undertaker and fed hw 7's. Here is what I was getting with the fed hw7. Tightwad was 110-120, undertaker 120-130. Polished the bore and it went up to over 150's. It has hit 180 before but mostly stays at 160. Some have different different results with the polishing of the bore so user beware. I now shoot handload TSS 9 and it gets 250 with the undertaker. Gave two birds dirt nap headaches last year. I now love hunting with a 20ga more than ever