Why aren’t rubber bullets completely made from rubber? Wouldn’t it be cheaper to make them without the metal center?
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Rubber is actually fairly expensive, and depending on the type of metal, it’s probably actually cheaper to have a rubber coated bullet. And for a rubber bullet to move through the action of the firearm, it needs the structure. The rubber would need to be very hard to cycle properly, possibly making them more dangerous
They would jam even more. As it they aren’t particularly reliable.
Bullets need to be partially structurally rigid. They have to deform enough to make a tight gas seal in the barrel, but not so much that it is too tight and jams, possibly blowing up the gun. The bullets also have to have enough lubricity to move as quickly down the barrel as possible, to gain velocity, since that’s part of what causes the bullet to be effective in the first place. An all rubber bullet would just keep deforming and stick to the barrel, robbing it of speed.
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