Embodiments of a predictably fragmenting projectile having internally-arranged geometric features are disclosed herein. According to various embodiments, a predictably fragmenting projectile having internally-arranged geometric features can include a substantially solid core of a material; a substantially continuous and smooth outer ogive; a plurality of petals attached to the core and formed from the material, each of the plurality of petals can include a smooth outer surface and can be formed by two break lines formed on the inside of the petals; and a cavity that is located proximate to the core and inner surfaces of the plurality of petals. The fragmenting projectile can be configured to deform by at least one of the plurality of petals pivoting outwardly relative to the cavity.