Just got in from another session with this upper, and you know, I still like it. I dont know why, but I do. I just finished bangin a squib round outta the lower 1/3 of the barrell after a round fired out of battery. again it  just about seperated the rim from the cartridge, just a tiny tab left holding the brass in one piece and of course the bullet was lodged in the barrel so that ended that session. Good thing I had my 10 / 22 with me. Getting the bullet out wasnt too bad and neither was cleanin up the undetonated power rememants in the reciever. I still like it.