Here is a listing of the hardness of various rifle cases, on the Rockwell B scale. This was new, never-fired brass.
| .30-06 Cartridge Case Hardness Rockwell B Scale | |
|---|---|
| (Federal) American Eagle | 87 |
| Dynamit Nobel-RWS (Germany) | 82 |
| Eldorado (PMC) | 86 |
| Federal | 87 |
| Hornady | 87 |
| IMI (Israel) | 88 |
| Lapua (Finland) | 86 |
| Norma (Sweden) | 90 |
| PMC (Eldorado) | 85 |
| PMC (Korea) | 87 |
| Remington | 93 |
| Sako (Finland) | 86 |
| Speer Nitrex | 88 |
| Winchester | 88 |