Possibly.
It could have been a charging handle impingement malfunction, where an empty case fails to extract properly and gets partially lodged in the carrier key channel, pinned between the bolt face and the inside of the charging handle.
A bolt override is when an empty casing fails to extract and gets caught in the carrier key channel, over the bolt itself, and pinned between the gas key and the inside of the charging handle. It's possible that a double feed will also override the bolt.
Both these stoppages require space to be made in the carrier key channel, by bringing the bolt to the rear and the charging handle forward. The simplest way to do this is to pull the charging handle back, locking the bolt to the rear, pushing the charging handle back forward, and giving the rifle a good shake.
Sometimes though, the casing is jammed so tightly between the bolt and the charging handle that you won't be able to get the bolt far enough back to lock it. In this case you need to pull the bolt back as far as you can, then stick something through the ejection port or mag housing to hold it in place. This takes the pressure off the charging handle, allowing you to slam it forward to create enough space for the empty casing to fall out.
If it's jammed so tight that you can't get the bolt back at all by pulling the charging handle, you'll have to close the buttstock and "mortar" the rifle by taking a knee, holding the rifle up and down like a mortar, and slamming the butt against the ground. Simultaneously, you're holding the bolt back the charging handle so that the force of each time you mortar the butt against the ground the bolt is getting a little farther to the rear. When you think you've brought the bolt back far enough, you can hold it in place by sticking your finger, the corner of a mag, or a multitool through the ejection port or mag housing. Then it's a matter of slamming the charging handle back forward, creating the space for the casing to shake out.
Keep in mind this is all theory to me. I've never had to do this in real life and I can only imagine what would happen if I tried to mortar a rifle on a CF range. I-6 knows about this stuff. I'm sure he'll be along to sort me out if I'm sending the wrong info...