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by Thriptic 3795 days ago
Mind explaining what you mean by tumbling characteristics?
2 comments

When a long spitzer (pointed) bullet like those used for .223/5.56 NATO rounds changes media, they start doing a 180, that is, tumble, so that the denser rear is in the direction of travel.
When a 5.56mm round strikes a solid object, it tumbles (aka "yaws", or rapidly changes orientation).

Contrary to popular legend, it does not tumble in flight.