Just an aside on stuck brake drums... grab the drum. If it is frozen in place get a 2 or 3lb hammer and frail away as you turn it. Hit it 3/6/9/12 some good stiff licks. Never broke a good drum. The broke ones usually needed turning bad and had stress fractures where it broke. Good riddance.
Using a rubber mallet is like a slap on the wrist. The object is maximum vibration to break the bond form when two objects stick together.
You need to clang the bell!