Load Specifications
Load data in caliber 6 x 70 R with .243 | 87gr | Berger VLD Hunting 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 32,068 psi | 85% | 2533 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 32,227 psi | 85% | 2552 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,721 psi | 89% | 1778 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 33,025 psi | 88% | 1804 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 34,113 psi | 90% | 2654 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 32,706 psi | 87% | 2467 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 32,590 psi | 86% | 2536 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 82% | 33,620 psi | 89% | 2533 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 32,474 psi | 86% | 2516 fps | 97.2% |
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% | 29,805 psi | 79% | 2477 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 28,166 psi | 75% | 2448 fps | 96.3% |
| Hodgdon TrailBoss | 8.8 gr | 80% | 25,280 psi | 67% | 1598 fps | 100% |
| ReloadSwiss RS 14 | 8.9 gr | 80% | 25,121 psi | 67% | 1631 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 31,908 psi | 85% | 2592 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,921 psi | 77% | 2372 fps | 97.2% |
| Vihtavuori N135 | <<locked>> | 80% | 30,560 psi | 81% | 2487 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 31,618 psi | 84% | 2484 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 80% | 30,298 psi | 80% | 2464 fps | 96.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 9 powders for 6 x 70 R loaded with the .243 | 87gr | Berger VLD Hunting. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,654 fps. Hodgdon TrailBoss gives the best case fill at 100 %, 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 87.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 87gr | Berger VLD Hunting 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.