It was a reload and the case was not showing any signs of bulging around the head. I ran it back through the resizing die and it was perfect. It was a PPU case. They are a wee bit thicker and several gr. heavier than most other cases. I tried chambering a dummy round once the stuck live round was removed and it also stuck. The thing that jammed both rounds was a barely visible piece of grit that I removed with a barrel bore brush dipped in Hoppes #9.
I have a ruptured case removal tool that was made for my No 4 Mk 1* and have used it only once. It’s designed to remove headless cases that remain in the chamber after the bullet has been fired. I’ve since found out that a paint can opener works just as well. I carry both in my range bag.
The Brownells Stuck Case Puller is designed to safely remove live rounds that have become jammed in the receiver. It has a collet that fits around the case head and a slide hammer that provides force that backs the stuck round out of the chamber. It’s a pretty slick tool. I thought about trying to tap the stuck round out with a rod but thought it wasn’t worth the risk.