I just tried to load some new bullets I bought 155 grain Montana gold hollow points .i first tried 800x powder with them first one stuck .I got it out then tried p38 power second one stuck .I usually use small rifle primers for this carbine it makes it more accurate but I tried small pistol primers this time .I have never had this happen very weird .I am really wondering if it's the bullets coating stopping the bullets in the barrel .I have never had a problem with this carbine using other bullets .They only went about 3 inches in the barrel and were very hard to get out .I miked them and they were .40 might be that coating . The bad thing I bought 6 bags of them guess I am stuck with them .