Load Specifications
Load data in caliber 6 mm ARC with .243 | 100gr | Sierra SP SemiSp bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Ramshot Big Game and Alliant Reloder-15.
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>> | 88% | 46,630 psi | 90% | 2566 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 44,498 psi | 86% | 2566 fps | 99.6% |
| Accurate 2495 | <<locked>> | 94% | 45,324 psi | 87% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 46,731 psi | 90% | 2651 fps | 99.6% |
| Accurate 4064 | <<locked>> | 96% | 45,281 psi | 87% | 2638 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 90% | 45,687 psi | 88% | 2618 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 96% | 46,470 psi | 89% | 2612 fps | 96.6% |
| ADI AR 2219 | <<locked>> | 82% | 46,572 psi | 89% | 2615 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 45,310 psi | 87% | 2585 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 90% | 46,369 psi | 89% | 2631 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 45,687 psi | 88% | 2671 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 44,599 psi | 86% | 2621 fps | 98% |
| Alliant Reloder-10x | <<locked>> | 84% | 46,572 psi | 89% | 2572 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 45,701 psi | 88% | 2641 fps | 96.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 45,237 psi | 87% | 2707 fps | 97.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 46,035 psi | 88% | 2510 fps | 100% |
| Bofors RP3 | <<locked>> | 96% | 44,440 psi | 85% | 2635 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 86% | 44,875 psi | 86% | 2533 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 90% | 46,151 psi | 89% | 2654 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 44,556 psi | 86% | 2674 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 86% | 45,020 psi | 86% | 2592 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 45,759 psi | 88% | 2612 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 90% | 45,992 psi | 88% | 2631 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 46,557 psi | 90% | 2694 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,910 psi | 65% | 1621 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 45,963 psi | 88% | 2612 fps | 97.8% |
| IMR 3031 | <<locked>> | 94% | 45,295 psi | 87% | 2651 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 45,266 psi | 87% | 2582 fps | 96.6% |
| IMR 4198 | <<locked>> | 82% | 45,165 psi | 87% | 2507 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 46,818 psi | 90% | 2677 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 88% | 45,310 psi | 87% | 2585 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 84% | 44,483 psi | 85% | 2569 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 92% | 46,731 psi | 90% | 2651 fps | 99.6% |
| Lovex S060 | <<locked>> | 90% | 46,412 psi | 89% | 2556 fps | 97.3% |
| Lovex S062 | <<locked>> | 94% | 45,165 psi | 87% | 2598 fps | 98.4% |
| Norma 201 | <<locked>> | 90% | 44,527 psi | 86% | 2572 fps | 98.2% |
| Norma 202 | <<locked>> | 90% | 44,353 psi | 85% | 2585 fps | 99.7% |
| Norma 203B | <<locked>> | 94% | 44,875 psi | 86% | 2631 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 94% | 45,063 psi | 87% | 2648 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 90% | 46,920 psi | 90% | 2648 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 46,557 psi | 89% | 2582 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,113 psi | 66% | 1660 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 44,976 psi | 86% | 2579 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 44,773 psi | 86% | 2690 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 45,368 psi | 87% | 2726 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 88% | 45,818 psi | 88% | 2575 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 92% | 44,875 psi | 86% | 2572 fps | 98.3% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 46,920 psi | 90% | 2667 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 46,731 psi | 90% | 2651 fps | 99.6% |
| Shooters World Precision | <<locked>> | 94% | 45,165 psi | 87% | 2598 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 44,788 psi | 86% | 2539 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 46,340 psi | 89% | 2677 fps | 97.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 44,454 psi | 85% | 2539 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 46,775 psi | 90% | 2635 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 46,717 psi | 90% | 2539 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 46,035 psi | 88% | 2539 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 45,643 psi | 88% | 2615 fps | 98.6% |
| Somchem S335 | <<locked>> | 90% | 45,934 psi | 88% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 45,310 psi | 87% | 2598 fps | 97% |
| Somchem S355 | <<locked>> | 98% | 45,600 psi | 88% | 2628 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 86% | 46,267 psi | 89% | 2520 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 46,122 psi | 89% | 2533 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 45,832 psi | 88% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 47,036 psi | 90% | 2605 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 40,669 psi | 78% | 2520 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 86% | 44,527 psi | 86% | 2585 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 94% | 46,586 psi | 89% | 2628 fps | 99.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 42,975 psi | 83% | 2549 fps | 96.8% |
| Winchester 748 | <<locked>> | 86% | 44,411 psi | 85% | 2631 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 44,527 psi | 86% | 2615 fps | 97.6% |
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% | 36,056 psi | 69% | 2382 fps | 99.8% |
| Accurate 2460 | <<locked>> | 80% | 38,986 psi | 75% | 2467 fps | 98.8% |
| Accurate 2495 | <<locked>> | 80% | 28,500 psi | 55% | 2274 fps | 98.9% |
| Accurate 2520 | <<locked>> | 80% | 32,938 psi | 63% | 2388 fps | 97% |
| Accurate 4064 | <<locked>> | 80% | 27,035 psi | 52% | 2251 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 37,637 psi | 72% | 2464 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 92% | 41,292 psi | 79% | 2516 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 43,511 psi | 84% | 2566 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 35,331 psi | 68% | 2388 fps | 95.8% |
| Alliant AR-Comp | <<locked>> | 80% | 33,402 psi | 64% | 2405 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 40,306 psi | 78% | 2566 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 34,940 psi | 67% | 2434 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,162 psi | 79% | 2484 fps | 100% |
| Alliant Reloder-15 | 26.2 gr | 90% | 40,596 psi | 78% | 2546 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 96% | 39,813 psi | 76% | 2595 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 43,294 psi | 83% | 2464 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 34,171 psi | 66% | 2431 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 37,478 psi | 72% | 2392 fps | 97.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 32,793 psi | 63% | 2392 fps | 95.7% |
| Hodgdon CFE223 | <<locked>> | 84% | 41,365 psi | 79% | 2612 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 37,115 psi | 71% | 2444 fps | 99.3% |
| Hodgdon H335 | <<locked>> | 80% | 42,873 psi | 82% | 2562 fps | 99.5% |
| Hodgdon H4895 | <<locked>> | 82% | 35,447 psi | 68% | 2425 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 36,085 psi | 69% | 2484 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,947 psi | 48% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 36,172 psi | 69% | 2421 fps | 95.1% |
| IMR 3031 | <<locked>> | 80% | 29,182 psi | 56% | 2320 fps | 98.2% |
| IMR 4064 | <<locked>> | 92% | 40,147 psi | 77% | 2487 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 42,641 psi | 82% | 2464 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 38,841 psi | 75% | 2526 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 35,331 psi | 68% | 2388 fps | 95.8% |
| Lovex D073.5 | <<locked>> | 80% | 38,595 psi | 74% | 2461 fps | 97.8% |
| Lovex D073.6 | <<locked>> | 80% | 31,096 psi | 60% | 2346 fps | 96.4% |
| Lovex S060 | <<locked>> | 84% | 39,175 psi | 75% | 2421 fps | 95.5% |
| Lovex S062 | <<locked>> | 84% | 33,301 psi | 64% | 2362 fps | 95.2% |
| Norma 201 | <<locked>> | 82% | 34,650 psi | 67% | 2375 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 32,518 psi | 62% | 2349 fps | 97.6% |
| Norma 203B | <<locked>> | 88% | 37,275 psi | 72% | 2484 fps | 95% |
| Ramshot Big Game | 27.9 gr | 90% | 39,668 psi | 76% | 2543 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 38,711 psi | 74% | 2497 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 82% | 40,669 psi | 78% | 2477 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,251 psi | 48% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 39,494 psi | 76% | 2477 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 41,887 psi | 80% | 2635 fps | 95.7% |
| ReloadSwiss RS 60 | 26.8 gr | 88% | 32,663 psi | 63% | 2438 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 36,172 psi | 69% | 2392 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 33,083 psi | 64% | 2333 fps | 95% |
| Rottweil R 903 | <<locked>> | 92% | 36,129 psi | 69% | 2464 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,096 psi | 60% | 2346 fps | 96.4% |
| Shooters World Precision | <<locked>> | 84% | 33,301 psi | 64% | 2362 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,974 psi | 81% | 2487 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 38,334 psi | 74% | 2523 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,959 psi | 81% | 2497 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 38,580 psi | 74% | 2484 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,505 psi | 66% | 2313 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,007 psi | 54% | 2182 fps | 97% |
| Somchem S321 | <<locked>> | 80% | 37,217 psi | 71% | 2454 fps | 96.8% |
| Somchem S335 | <<locked>> | 80% | 33,707 psi | 65% | 2313 fps | 98.5% |
| Somchem S341 | <<locked>> | 86% | 39,827 psi | 76% | 2497 fps | 95.6% |
| Somchem S355 | <<locked>> | 90% | 35,447 psi | 68% | 2434 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 38,334 psi | 74% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 32,285 psi | 62% | 2280 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 80% | 29,486 psi | 57% | 2290 fps | 99.1% |
| Vihtavuori N140 | <<locked>> | 80% | 30,197 psi | 58% | 2280 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 92% | 31,792 psi | 61% | 2333 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,840 psi | 71% | 2434 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 80% | 29,834 psi | 57% | 2290 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 37,550 psi | 72% | 2444 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 36,071 psi | 69% | 2467 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,247 psi | 73% | 2497 fps | 96% |
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 70 powders for 6 mm ARC loaded with the .243 | 100gr | Sierra SP SemiSp. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,726 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (359 MPa), the top charges use 65–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, 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, Ramshot Big Game, Alliant Reloder-15 rank at the top here: for 6 mm ARC with the .243 | 100gr | Sierra SP SemiSp 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.