best way shoot yourselfwouldnt shooting top skull would cause destructive woundcompared mouth side head chin ive also heard aiming back head chin mouthful water even effective either normal methods bullet fails bullet travelling water produces large shockwave failsafesaid like shotgun blast using large bullets ampxb brainstem slightly away shooting downward it see reason itd much harder aim at top head simply thick bullet travel straight even large caliber guns longer bullet travel brainstem large hollow point bullet expand more causing larger wounds right reason ive never heard anyone shooting downward skulls water mouth