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EspañolSUB-CALIBER ROUND
A Kinetic energy penetrator, an example of a Sub-caliber round.
A 'Sub-caliber round' is a round whose diameter is inferior to the barrel diameter.
Because the round does not shut the chamber close, an expendable part (called a ''sabot'') is required to expand the diameter to the full barrel width of the firing gun.
The most used sub-caliber rounds are flechettes and Kinetic energy penetrator tank shells.
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