Stevens 200 .243, took this gun to the range last week, shot great no problems. Put the gun in its case, took it home. Haven't touched it since, no bumps jostles etc.

Today when I went to shoot it the bolt opened fine, and slid back fine until the bolt heads (?) are about to slide back into the rear of the action. Then it got VERY stiff/tight.

I assumed something was in there so I went to pull the bolt out and it was all I could do to get it out.

There are no signs of debris, no scratches or scuffs.

Went to put the bolt back in and again very thight until the bolt heads cleared the rear of the action then smooth as silk.

Any ideas?