There I was, at the range, shooting my 1925 Springfield M1903. After three shots, I chambered a live round that went part way into the chamber and stuck. I pushed the bolt harder - bad move on my part. Now the round is jammed and would not move in either direction. Not wanting to pound on the bullet from the muzzle, I consulted the Brownells web page and found and ordered one of their Stuck Case Pullers. It was on backorder so it took several weeks to get, but it was worth the wait. The puller is a well built, well designed tool that worked perfectly. The instructions are clear and there is even a tutorial video on their web page.
It had to be the round, right? But I examined the case and it looked fine, I even pulled the bullet, primer and powder and put it through my resizing die and found nothing wrong.
I tried to lightly chamber a dummy round in the rifle and it got stuck but the bolt extractor was able to pull it out. I looked inside the chamber with a bore light and could hardly believe that a tiny piece of grit on the chamber wall was causing the problem. It was easily removed with a medium bore brush soaked in bore cleaner. The dummy round would then completely enter the chamber smoothly.
Obviously, a live round that is stuck part way into a chamber of any firearm immediately becomes a very dangerous condition. The puller is the safest way to remove it.
One lesson I learned from this experience is to always gently chamber every round and stop pushing the bolt forward if resistance is felt. The bolt extractor might be able to pull it back.
The thing I wondered about - how often did something like this happen on the battlefield?