The Speer plastic bullets are great, but they only come in three calibers.
With the gluelets, you can pick up a cheap Lee 2 cavity mold, and pour up any caliber you choose to and a much wider variety per caliber.
While they might not be for everyone, they sure can be fun.
I have only done the wax myself, and can testify that they WILL indeed easily penetrate window screen, and in the 44 will cleanly take out a nusience attic squirrel with a shot to the head at around 20ft. So I hear....
