Description
This Standard Bullet Seating Micrometer is a direct replacement for the original seater Plugs with ½” x 20 threads. Easily swapped form one die to another.
Fits –
| 30/338 Win. Mag. |
| 300 Norma Magnum |
| 30-338 Win. Mag. |
| 33 Nosler |
| 338 Lapua Mag. |
| 338 Rem. Ultra Mag. |
| 338 Win. Mag. |
| 338-06 (A-Square) |
| 338-06 Imp. 40° |
| 338-378 Weatherby Mag. |
| 340 Weatherby Mag. |
| 7.65MMx53 Mauser |
![[P55340] Starting Key (2-Pack)](https://www.greatdiyhardware.com/wp-content/uploads/2026/07/p55340-starting-key-2-pack.webp)
