Load Specifications
Load data in caliber 6 x 70 R with .243 | 85gr | Rhino Solid Shank bullet and 8 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% | 33,141 psi | 88% | 2595 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 33,533 psi | 89% | 2625 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 98% | 32,982 psi | 87% | 1804 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 33,504 psi | 89% | 1854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 33,605 psi | 89% | 2530 fps | 98.6% |
| Vihtavuori N135 | <<locked>> | 82% | 33,692 psi | 89% | 2602 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 88% | 33,997 psi | 90% | 2592 fps | 96% |
| Vihtavuori N540 | <<locked>> | 82% | 33,533 psi | 89% | 2582 fps | 97.6% |
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% | 30,893 psi | 82% | 2543 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 29,211 psi | 77% | 2513 fps | 96.8% |
| Hodgdon TrailBoss | 9.2 gr | 80% | 25,324 psi | 67% | 1637 fps | 100% |
| ReloadSwiss RS 14 | 9.4 gr | 80% | 25,527 psi | 68% | 1677 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,849 psi | 79% | 2438 fps | 97.6% |
| Vihtavuori N135 | <<locked>> | 80% | 31,720 psi | 84% | 2556 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 32,082 psi | 85% | 2546 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,372 psi | 83% | 2530 fps | 96.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 8 powders for 6 x 70 R loaded with the .243 | 85gr | Rhino Solid Shank. Accurate 4064 delivers the highest muzzle velocity at 2,625 fps; across all powders the maximum-charge window runs from 1,804 fps to 2,625 fps. Hodgdon TrailBoss gives the best case fill at 98 %, and 8 of the 8 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 87–90 %, leaving at least 10 % headroom. The 85.0 gr projectile in 0.243" calls for a 1:12.0 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 | 85gr | Rhino Solid Shank 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.