6 mm caliber .264in (6.6mm) and up .264in (6.6mm) and up

| Name_ | Bullet | Length_ | Base | Shoulder | Neck |
|---|---|---|---|---|---|
| 6.5 x 50 SR Arisaka | 6.705 (.264) | 50.39 (1.984) | 11.35 (.447) | 10.59 (.417) | 7.34 (.289) |
| 6.5 x 53.5 R Dutch Mannlicher | 6.756 (.266) | 53.59 (2.110) | 11.48 (.453) | 10.75 (.423) | 7.55 (.297) |
| 6.5x54 mm Mannlicher-Schönauer | 6.705 (.264) | 53.65 (2.112) | 11.47 (.452) | 10.87 (.428) | 7.56 (.288) |
| 6.5x55mm Swedish (aka 6.5x55mm Krag) | 6.7 (.264) | 54.864 (2.16) | 12.17 (.479) | 10.688 (.420) | 7.468 (.294) |
| 6.5x58 mm Vergueiro | 6.65 (.262) | 57.85 (2.278) | 11.88 (.468) | 10.94 (.431) | 7.56 (.298) |
| 6.5 x 68 | 6.70 (.264) | 75.02 (2.956) | 13.30 (.524) | 12.18 (.480) | 7.60 (.299) |
| 6.5-284 | 6.70 (.264) | 55.118 (2.170) | 12.725 (.501) | 12.065 (.475) | 7.544 (.297) |