| 1. | The 75 mm Pzgr . 39 / 42 of sintered iron driving bands.
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| 2. | The projectiles used a copper driving band to engage the rifling.
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| 3. | The gas-checks evolved into the driving bands still in use today.
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| 4. | The manufacture of shell driving bands was another notable contribution.
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| 5. | Two copper driving bands provided a gas-tight seal against the gun barrel during firing.
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| 6. | This was soon followed by the Vavaseur copper driving band as part of the projectile.
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| 7. | The driving band rotated the projectile, centred it in the bore and prevented gas escaping forwards.
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| 8. | The wide forward driving band helps keep the bullet aligned as it jumps across the cylinder gap.
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| 9. | The double drive wheel is named after its drive band, which goes around the spinning wheel twice.
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| 10. | A driving band has to be soft but tough enough to prevent stripping by rotational and engraving stresses.
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