How do you prevent 'Spiral-Out' failure in applications with high axial shock loads?

'Spiral-out' occurs when an axial shock load causes the ring to deflect and 'walk' itself out of the groove, one turn at a time. This is prevented by: 1) Using a 'Heavy Duty' series ring with a thicker radial wall. 2) Ensuring the groove is deep enough to capture at least 70% of the ring's radial width. 3) Using a 'Self-Locking' spiral ring where a tab on the inner turn locks into the outer turn. 4) Ensuring the mating part has a sharp corner ($r < 0.005$) to ensure the load is applied as close to the groove bottom as possible, minimizing the 'dishing' moment.