The 32 special is a good round. A lot of balony was printed years ago about how they would suddenly go bad accuracy wise with the slightest wear in the bore, but it was just that, balony. The 32's seem evey bit as accurate as the 30-30 in similar condition.
I seriously doubt any destruction or apocolyptic events would transpire if you fired a 30-30 round in a 32 spl. Accuracy would be abysmal, but there woudnt be much pressure with the bullet rattling down the bore, the case would most likley expand to fill the chamber. A local guy bought one of the new supershortmagum jobs, and couldnt get it sighted in for anything, couldnt even keep the shots on a 4x4 sheet of plywood @ 100 yards. He took the gun back to the gunshop and complained. They asked to see the ammo he was shooting, which had been supplied to him when he bough the gun, it was 7mm supershortmagum ammo, and his gun was a 30 caliber supershortmagum. No mishaps, other than wasting time and money trying to sight it in. I've also seen a very old case that was found locally, it was a 405 Winchester round apparently fired in a trapdoor Springfield. You could see the chamber shape of the 45-70 with the 405 case blown out oddly shaped to fill it, and the front end of the case had expanded into the 3 groove rifling. The 405 bullet didnt build up much pressure apparently, rattling down the .457+" bore.
Here's one of the old ads. I've seen others, but didn't save them.