How to test for hardness of zinc?

The hardness of the material gives it the ability to resist permanent deformation when the load is applied. From an engineering point of view, determining the hardness of the material is important because resistance to wear by erosion or friction by different elements...

How to test bullet hardness?

What is the bullet hardness? The hardness of the bullet depends on the hardness of the lead alloy that is used to manufacture bullets. This hardness also depends upon the type of pistol that will be used to fire the bullet. It is so because in Muzzleloaders bullets...
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