US12779473 - Systems and methods for separating bullets from backstop material

The patent describes a method for recovering fired bullets from backstop material using buoyancy separation in liquids of varying densities. This process allows for the efficient extraction of bullets while also separating backstop material from gangue material.
Claim 1
1 . A method for recovering bullets from a backstop, the method comprising: collecting fired bullets and backstop material from the backstop; separating the collected bullets and backstop material based on buoyancy of the collected bullets and backstop material in a liquid, the liquid having a density that is greater than the density of the backstop material and less than the density of the collected bullets; and separating the collected backstop material from gangue material based on buoyancy of the backstop material and gangue material in a second liquid, the second liquid having a density that is greater than the gangue material and less than the density of the backstop material. collecting fired bullets and backstop material from the backstop; separating the collected bullets and backstop material based on buoyancy of the collected bullets and backstop material in a liquid, the liquid having a density that is greater than the density of the backstop material and less than the density of the collected bullets; and separating the collected backstop material from gangue material based on buoyancy of the backstop material and gangue material in a second liquid, the second liquid having a density that is greater than the gangue material and less than the density of the backstop material.
Google Patents
https://patents.google.com/patent/US12779473
USPTO PDF
https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12779473