Just wondering if any one elsa has had this happen. I sometimes will shoot a few Velocitors out of a 1957 39A just for a 5 shot group. I noticed that when I do the lever works very stiff. Last time I saw some flash and blow out on my 5th shot from the side of the riifle. I haven't shot any of these rounds since through this rifle. They seem to work fine in the rest of my Marlins.