Believe or not I got my gf set up on my youth 870 only choke I could find around was the truglo gobbler stopper xtreme, TGI177x .565, it was the combo pack and came with some stick on sights. Ended up getting the magnum blend since they don't make longbeard in 20 and figured I needed all the help I can get. Well ended up shooting it. 40yd is killer performs pretty much the same as my 12 with a kicks 670. I tell ya I shot that thing a few times and love it. If she doesn't go I use that thing.
Just found the picture of those magblends at 40 yd