Load Specifications
Load data in caliber 6 x 70 R with .243 | 95gr | Barnes LRX BT bullet and 13 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>> | 84% | 31,879 psi | 85% | 2415 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 32,256 psi | 86% | 2441 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,707 psi | 89% | 1670 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 33,576 psi | 89% | 2487 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 82% | 32,663 psi | 87% | 2438 fps | 97.2% |
| Norma 202 | <<locked>> | 82% | 33,982 psi | 90% | 2441 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,823 psi | 90% | 1709 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 32,663 psi | 87% | 2438 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 33,243 psi | 88% | 2362 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 84% | 33,127 psi | 88% | 2428 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 82% | 32,314 psi | 86% | 2385 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 90% | 33,286 psi | 88% | 2418 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 84% | 33,127 psi | 88% | 2418 fps | 97.8% |
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% | 27,630 psi | 73% | 2313 fps | 98.9% |
| Accurate 4064 | <<locked>> | 80% | 26,179 psi | 69% | 2287 fps | 96% |
| Hodgdon TrailBoss | 8.1 gr | 80% | 24,947 psi | 66% | 1496 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 31,299 psi | 83% | 2434 fps | 99% |
| Lovex D073.6 | <<locked>> | 80% | 30,139 psi | 80% | 2379 fps | 96.3% |
| Norma 202 | <<locked>> | 80% | 31,749 psi | 84% | 2388 fps | 97.5% |
| ReloadSwiss RS 14 | 8.2 gr | 80% | 24,743 psi | 66% | 1526 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,139 psi | 80% | 2379 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,340 psi | 73% | 2221 fps | 97% |
| Vihtavuori N135 | <<locked>> | 80% | 28,718 psi | 76% | 2329 fps | 99% |
| Vihtavuori N140 | <<locked>> | 80% | 30,226 psi | 80% | 2336 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 88% | 31,140 psi | 83% | 2369 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 28,718 psi | 76% | 2310 fps | 96.2% |
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 13 powders for 6 x 70 R loaded with the .243 | 95gr | Barnes LRX BT. IMR 3031 delivers the highest muzzle velocity at 2,487 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,487 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 13 of the 13 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 95.0 gr projectile in 0.243" calls for a 1:7.5 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. ReloadSwiss RS 60, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 6 x 70 R with the .243 | 95gr | Barnes LRX BT 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.