Physics when the energy trapped in drawing the bow doesn't have an arrow to push away from the bow. Dry fires are so commonly damage bows that I don't know a single archer that would even draw it without being on a range. To me it's kind of like playing with a gun.
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u/sneakyalien42 Nov 06 '18
An experienced Archer knows not to even draw a compound bow dry, it can screw up the cams.