I got one earlier this year and have put about 4,000 carts through it.
No misfires or ejection problems and with 28g on clays light recoil.
imho a decent semi for the price.
I had the same problem. Eventually found it was due to the frame having become distorted. I tried putting pressure around the door and frame with
my hand, and slacked off a holding bolt one eight of a turn.
Worth a try
I bought one about a month ago and I have only used it on clays so far and my scores have improved a lot. I have seen a lot of negative comments about these guns but I don't know why.
I shot 150 28g cartridges last week with no recoil problem at all. Well pleased with it.