Excavations near Shute unearthed the device on Wednesday afternoon.
Royal Navy engineers were called to the scene and the shell, believed to be from World War II, was detonated on Strete Gate Beach.
The police wanted to reassure the public any explosion heard in the area on Wednesday night was nothing to be concerned about.
Dartmoor visitor centre gets one last reprieve
But it will close in October unless cash can be found
Cornwall is key to Torbay's role in Devon devolution
'The two counties are natural partners'
Devon and Cornwall should combine under mayor, says Exeter MP
Steve Race supports city's unitary bid too
Plymouth supports South West Peninsula authority
Counties will get more working together, its claimed
Devon votes in favour of postponing May’s elections
Claims of democracy ‘denied’
