Load Specifications
Load data in caliber 6 x 70 R with .243 | 90gr | Nosler AccuBond bullet and 9 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 14 and Hodgdon TrailBoss.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 32,010 psi | 85% | 2484 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 32,256 psi | 86% | 2507 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 98% | 32,822 psi | 87% | 1719 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 32,996 psi | 88% | 1762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 34,026 psi | 90% | 2605 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 32,648 psi | 87% | 2418 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 32,460 psi | 86% | 2487 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 82% | 33,576 psi | 89% | 2484 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 32,503 psi | 86% | 2470 fps | 97.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 29,675 psi | 79% | 2428 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 28,108 psi | 75% | 2398 fps | 96.5% |
| Hodgdon TrailBoss | 8.5 gr | 80% | 25,034 psi | 66% | 1555 fps | 100% |
| ReloadSwiss RS 14 | 8.7 gr | 80% | 25,280 psi | 67% | 1594 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 31,778 psi | 84% | 2543 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,761 psi | 76% | 2323 fps | 97.3% |
| Vihtavuori N135 | <<locked>> | 80% | 30,400 psi | 81% | 2438 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 31,546 psi | 84% | 2438 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 30,284 psi | 80% | 2418 fps | 96.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 9 powders for 6 x 70 R loaded with the .243 | 90gr | Nosler AccuBond. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,605 fps. Hodgdon TrailBoss gives the best case fill at 98 %, and 9 of the 9 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 90gr | Nosler AccuBond they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.