| Color Identification | Nominal velocity |
Meters per Second (± 13.5) | Feet per Second (± 45) |
Power Level | Case Color | Load Color |
1 | Brass | | Gray | 91 | | 300 | |
2 | Brass | | Brown | 119 | | 390 | |
3 | Brass | | Green | 146 | | 480 | |
4 | Brass | | Yellow | 174 | | 570 | |
5 | Brass | | Red | 201 | | 660 | |
6 | Brass | | Purple | 229 | | 750 | |
7 | Nickel | | Gray | 256 | | 840 | |
8 | Nickel | | Brown | 283 | | 930 | |
9 | Nickel | | Green | 311 | | 1020 | |
10 | Nickel | | Yellow | 338 | | 1110 | |
11 | Nickel | | Red | 366 | | 1200 | |
12 | Nickel | | Purple | 393 | | 1290 | |
Note: | The nominal velocity applies to a 9.53 mm (3/8-in) diameter 22.7-gram (350-grain) ballistic slug fired in a test device and has no reference to actual fastener velocity developed in any specific tool. |
(5) Optional power load variation. Where means other than power loads of varying power levels are to be used to control penetration, such means must provide an equivalent power level variation.