i have Mossberg 835 and using a Carlson long beard choke with a lead sled.
i started out shooting light load at 15 yds to get to see where my point of aim is and got it close so then moved to 25 yds.
not bad with no. 6 shot long beard and then moved to 40 yds and now i can't get it to pattern just right. this lead sled i just bought i can't get the forearm to sit on front rest. it sits just in front of it, i don't think it matters. maybe not holding front of gun steady enough. but anyway might have to start over