A misfire, as in failure to fire, indicates that the round failed to fully seat (to go fully into battery). As noted earlier (and you can confirm), that the firing pin has now been removed, which makes the actual round less likely to go off, as the primer is the high explosive section of the round, which lights the lower explosive powder.If memory serves, it was a misfire on the range and the action stuck, not ejecting the round. Only got through half of a new 20-round box of Winchester 30-30.
The most likely explanation is something else has traveled with the bolt and jammed the action.
The most likely culprit is the extractor spring which lives on the back wall behind the bolt (a small section of spring steel).
Either carefully hold the rifle in a vice and, using a brass punch and hammer, tap the bolt backwards (and put some soft rags down, in case the bolt slips out), which should get things moving (the best option). You may need a firm tap, as the lever gave you mechanical advantage when originally loading the round.
Or (and this is much more risky) if that doesn't work, get a piece of wood dowel that is just under .3, and pokes about an inch out of the barrel when on top of the round, and whilst everything is still in the vice, give the dowel a good rap with a hammer (or a wood mallet if you have one, not a rubber mallet). You will probably ruin the round, but you do need to clear the obstruction. It is unlikely that the round will fire, without a firing pin, however, the first method is much safer, and should be your first option.
Always keep out of the line of the weapon, it is 'loaded'.
Always wear safety glasses, there is potential for a rapid escape of gas (a wall rupture, from firing, unchambered), although remote.
Cannot guarantee either will work, that either is totally safe, but those are the options I see.