Primer Diameters
| Primer Diameter, Inches | Primer Description |
|---|---|
| 0.175 | Small Pistol or Small Rifle primer |
| 0.210 | Large Pistol or Large Rifle primer |
| 0.315 | .50 BMG |
Flash-Hole Diameters
| Flash Hole Diameter, Inches | Designation |
|---|---|
| 0.080 | Standard |
| 0.062 | Small |
| 0.138 | .50 BMG Standard |
| 0.100 | .50 BMG Small |