Has anyone had this problem, or heard of it? I have a fairly new 870 express, it came with the 18" barrel w/ bead sight and mag extension. I replaced the barrel with the 20" smoothbore barrel with rifle sights. I purchased a whole bunch of Brenneke KO 2 3/4" slugs, and it shoots them great, very accurate. However, after I fire a round, its very hard to extract the spent casing, like its stuck or something. I've never fired another shotgun that has done this with any type of ammo, its always been very easy to cycle all other pump actions I've shot. I want to try some other ammo (haven't done that yet) to see if its just a problem with the Brenneke's, but does anyone have an idea on this? Thanks!