Load Specifications
Load data in caliber 6 mm ARC with .243 | 75gr | Barnes X S bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Hodgdon H322 and Norma 202.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 92% | 44,614 psi | 86% | 2881 fps | 99.3% |
| Accurate 2460 | <<locked>> | 90% | 46,166 psi | 89% | 2927 fps | 97.4% |
| Accurate 2495ᴾ | <<locked>> | 100% | 45,542 psi | 88% | 2966 fps | 99.6% |
| Accurate 2520 | <<locked>> | 96% | 46,717 psi | 90% | 2995 fps | 97.1% |
| Accurate 4064ᴾ | <<locked>> | 100% | 43,830 psi | 84% | 2946 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 86% | 46,789 psi | 90% | 2838 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 84% | 44,353 psi | 85% | 2792 fps | 96.5% |
| ADI AR 2207 | <<locked>> | 82% | 45,382 psi | 87% | 2864 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 45,556 psi | 87% | 2943 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 94% | 44,280 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 88% | 46,427 psi | 89% | 2927 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 82% | 47,050 psi | 90% | 2871 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 46,050 psi | 88% | 2835 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 92% | 46,572 psi | 89% | 2963 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 86% | 45,107 psi | 87% | 2933 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 84% | 46,601 psi | 89% | 2844 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,344 psi | 64% | 1847 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 46,137 psi | 89% | 3018 fps | 99.2% |
| IMR 4198 | <<locked>> | 88% | 46,934 psi | 90% | 2897 fps | 100% |
| Lovex D073.4 | <<locked>> | 84% | 46,253 psi | 89% | 2936 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 96% | 44,469 psi | 85% | 2946 fps | 96.6% |
| Norma 200 | <<locked>> | 84% | 47,108 psi | 90% | 2910 fps | 100% |
| Norma 202 | <<locked>> | 96% | 45,687 psi | 88% | 2943 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,489 psi | 64% | 1893 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 44,454 psi | 85% | 2890 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 92% | 46,108 psi | 89% | 2900 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 84% | 46,253 psi | 89% | 2936 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 96% | 44,469 psi | 85% | 2946 fps | 96.6% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 46,383 psi | 89% | 2946 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 45,324 psi | 87% | 2910 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 46,282 psi | 89% | 2851 fps | 97.5% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 44,759 psi | 86% | 2841 fps | 98.2% |
| Somchem S335 | <<locked>> | 94% | 45,295 psi | 87% | 2858 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 84% | 44,889 psi | 86% | 2805 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 45,788 psi | 88% | 2854 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 96% | 44,614 psi | 86% | 2848 fps | 99.3% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 45,455 psi | 87% | 2959 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 98% | 45,266 psi | 87% | 2910 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 98% | 45,397 psi | 87% | 2940 fps | 97.4% |
| Winchester 748 | <<locked>> | 92% | 46,470 psi | 89% | 2989 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 31,589 psi | 61% | 2585 fps | 96.4% |
| Accurate 2460 | <<locked>> | 84% | 37,855 psi | 73% | 2756 fps | 95.2% |
| Accurate 2495 | <<locked>> | 84% | 28,079 psi | 54% | 2562 fps | 95.5% |
| Accurate 2520 | <<locked>> | 92% | 41,031 psi | 79% | 2884 fps | 95.7% |
| Accurate 4064 | <<locked>> | 92% | 35,056 psi | 67% | 2749 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 39,218 psi | 75% | 2687 fps | 97.2% |
| Accurate LT-32 | <<locked>> | 80% | 39,537 psi | 76% | 2687 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 42,960 psi | 83% | 2822 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 37,768 psi | 73% | 2772 fps | 96.5% |
| Alliant AR-Comp | 22.3 gr | 80% | 29,660 psi | 57% | 2608 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,883 psi | 71% | 2730 fps | 98.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,266 psi | 85% | 2818 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,319 psi | 74% | 2680 fps | 97.3% |
| Hodgdon H322 | 23 gr | 82% | 34,824 psi | 67% | 2700 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 80% | 37,289 psi | 72% | 2762 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 41,553 psi | 80% | 2743 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,063 psi | 48% | 1657 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 31,299 psi | 60% | 2661 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 37,565 psi | 72% | 2707 fps | 99.5% |
| Lovex D073.4 | <<locked>> | 80% | 40,219 psi | 77% | 2812 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 92% | 39,320 psi | 76% | 2838 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 42,090 psi | 81% | 2815 fps | 99.8% |
| Norma 202 | 25 gr | 88% | 36,506 psi | 70% | 2746 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,947 psi | 48% | 1693 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 41,785 psi | 80% | 2835 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 86% | 39,465 psi | 76% | 2759 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 80% | 40,219 psi | 77% | 2812 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 39,320 psi | 76% | 2838 fps | 95.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,696 psi | 74% | 2785 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 35,679 psi | 69% | 2700 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 37,217 psi | 71% | 2664 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,895 psi | 65% | 2605 fps | 95.2% |
| Somchem S335 | <<locked>> | 84% | 34,418 psi | 66% | 2618 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 40,408 psi | 78% | 2723 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,722 psi | 67% | 2621 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 29,022 psi | 56% | 2477 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 84% | 28,514 psi | 55% | 2556 fps | 95.3% |
| Vihtavuori N140 | <<locked>> | 90% | 36,274 psi | 70% | 2717 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 92% | 37,869 psi | 73% | 2779 fps | 95.3% |
| Winchester 748 | <<locked>> | 90% | 43,221 psi | 83% | 2923 fps | 95.1% |
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 40 powders for 6 mm ARC loaded with the .243 | 75gr | Barnes X S. IMR 3031 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,018 fps. Accurate 2495 gives the best case fill at 100 %, and 40 of the 40 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (359 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 75.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, 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. Alliant AR-Comp, Hodgdon H322, Norma 202 rank at the top here: for 6 mm ARC with the .243 | 75gr | Barnes X S 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.