You could dislocate your shoulder with this:

The .557 Tyrannosaur cartridge. This cartridge was designed at the request of professional African hunters for use in so-called backup guns! Technical specifications: Bullet diameter — 14.86 mm Bullet weight — 48.6 g Cartridge length — 94.23 mm Muzzle velocity — 732 m/s Muzzle energy — 13,550 J (for comparison, a bullet fired from a Mosin rifle (a Russian bolt-action service rifle) has a muzzle energy of only 3,500 J) via m_i_s_t_e_r_x_1
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