Load Specifications
Load data in caliber 6 x 70 R with .243 | 108gr | Hornady ELD Match bullet and 11 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, 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 |
|---|---|---|---|---|---|---|
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,359 psi | 88% | 2310 fps | 96.8% |
| Bofors RP3 | <<locked>> | 82% | 32,750 psi | 87% | 2310 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 98% | 33,663 psi | 89% | 1565 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 98% | 33,997 psi | 90% | 1601 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 33,156 psi | 88% | 2385 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 84% | 33,025 psi | 88% | 2306 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 34,084 psi | 90% | 2234 fps | 99.7% |
| Somchem S355 | <<locked>> | 84% | 34,113 psi | 90% | 2316 fps | 96.6% |
| Somchem S365 | <<locked>> | 94% | 33,475 psi | 89% | 2388 fps | 97.8% |
| Vihtavuori N150 | <<locked>> | 84% | 32,532 psi | 86% | 2260 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,344 psi | 88% | 2283 fps | 96.1% |
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 |
|---|---|---|---|---|---|---|
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,241 psi | 83% | 2260 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 30,676 psi | 81% | 2260 fps | 96% |
| Hodgdon TrailBoss | 8.2 gr | 80% | 25,846 psi | 69% | 1414 fps | 100% |
| ReloadSwiss RS 14 | 8.3 gr | 80% | 25,817 psi | 68% | 1444 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,022 psi | 77% | 2270 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 82% | 30,966 psi | 82% | 2260 fps | 95.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,923 psi | 85% | 2192 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 29,994 psi | 80% | 2221 fps | 95% |
| Somchem S365 | 26.5 gr | 88% | 27,789 psi | 74% | 2241 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 28,514 psi | 76% | 2169 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,125 psi | 83% | 2228 fps | 95.1% |
Recommended = one of the top powders for this cartridge and bullet combination.
This overview compares 11 powders for 6 x 70 R loaded with the .243 | 108gr | Hornady ELD Match. Somchem S365 delivers the highest muzzle velocity at 2,388 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,388 fps. Hodgdon TrailBoss gives the best case fill at 98 %, and 11 of the 11 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (260 MPa), the top charges use 86–90 %, leaving at least 10 % headroom. The 108.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Somchem S365, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 108gr | Hornady ELD Match 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.