Load Specifications
Load data in caliber 6 x 70 R with .243 | 80gr | Fox Classic Hunter bullet and 11 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 4064, 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>> | 86% | 32,677 psi | 87% | 2644 fps | 99.1% |
| Accurate 4064 | <<locked>> | 88% | 32,808 psi | 87% | 2661 fps | 97% |
| Alliant AR-Comp | <<locked>> | 82% | 33,605 psi | 89% | 2690 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,199 psi | 88% | 1837 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 32,198 psi | 85% | 2667 fps | 98% |
| Norma 202 | <<locked>> | 82% | 32,590 psi | 86% | 2615 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,257 psi | 88% | 1880 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 33,968 psi | 90% | 2582 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 86% | 33,431 psi | 89% | 2651 fps | 99.1% |
| Vihtavuori N140 | <<locked>> | 84% | 32,982 psi | 87% | 2605 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 86% | 33,837 psi | 90% | 2638 fps | 96.6% |
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% | 26,585 psi | 71% | 2480 fps | 97.2% |
| Accurate 4064 | 26.2 gr | 84% | 28,921 psi | 77% | 2556 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 31,488 psi | 84% | 2638 fps | 99.9% |
| Hodgdon TrailBoss | 8.6 gr | 80% | 24,671 psi | 65% | 1647 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,892 psi | 79% | 2602 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 30,647 psi | 81% | 2566 fps | 95.5% |
| ReloadSwiss RS 14 | 8.8 gr | 80% | 24,831 psi | 66% | 1690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 28,166 psi | 75% | 2434 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 27,514 psi | 73% | 2497 fps | 97.4% |
| Vihtavuori N140 | <<locked>> | 80% | 28,863 psi | 77% | 2493 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 84% | 31,821 psi | 84% | 2585 fps | 95.8% |
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 11 powders for 6 x 70 R loaded with the .243 | 80gr | Fox Classic Hunter. Alliant AR-Comp delivers the highest muzzle velocity at 2,690 fps; across all powders the maximum-charge window runs from 1,837 fps to 2,690 fps. Hodgdon TrailBoss gives the best case fill at 100 %, 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 85–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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. Accurate 4064, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 80gr | Fox Classic Hunter 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.