Ithaca Model 37 20 gauge TurkeySlayer Pattern ?

[lakeplainshunter]

I have an older Ithaca Model 37 20 gauge TurkeySlayer, Kings Ferry, NY gun, that I will be ordering a SumToy .562 Turkey Choke for this week.  I have Hevi 13 7 shot.  What can I realistically expect for a pellet count in a 10" circle at 40 yards?  I see some really great patterns on this site and don't want to set my expectation too high or unrealistic.

[gobblergls]

Nice gun.  I have the newer edition, but the older may be lighter.  Tonight I'll upload a photo of the Sumtoy .5625 and Tungsten 9's pattern.  It's a great hunting pattern. 

[gobblergls]

Here are some photos at this thread:
http://oldgobbler.com/Forum/index.php/topic,25306.msg272043.html#msg272043