Load Specifications
Load data in caliber 6 mm ARC with .243 | 100gr | Speer Grand Slam bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon LEVERevolution, ReloadSwiss RS 60 and IMR 4895.
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% | 45,310 psi | 87% | 2536 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 46,775 psi | 90% | 2592 fps | 99.7% |
| Accurate 2495 | <<locked>> | 94% | 44,034 psi | 85% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 45,513 psi | 88% | 2621 fps | 99.4% |
| Accurate 2520 | <<locked>> | 90% | 45,513 psi | 88% | 2621 fps | 99.4% |
| Accurate 4064 | <<locked>> | 98% | 46,644 psi | 90% | 2651 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 82% | 46,615 psi | 90% | 2490 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 46,992 psi | 90% | 2503 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 90% | 44,570 psi | 86% | 2589 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 96% | 45,469 psi | 87% | 2582 fps | 96.2% |
| ADI AR 2219 | <<locked>> | 82% | 45,774 psi | 88% | 2595 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 44,179 psi | 85% | 2556 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 90% | 44,962 psi | 86% | 2602 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 44,831 psi | 86% | 2644 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 46,557 psi | 89% | 2644 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 84% | 45,643 psi | 88% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 44,657 psi | 86% | 2612 fps | 96.3% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 44,034 psi | 85% | 2671 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 45,455 psi | 87% | 2490 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 46,412 psi | 89% | 2635 fps | 96% |
| Bofors RP3 | <<locked>> | 98% | 46,456 psi | 89% | 2657 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 88% | 46,615 psi | 90% | 2552 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 90% | 44,527 psi | 86% | 2618 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 88% | 46,528 psi | 89% | 2700 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 88% | 46,847 psi | 90% | 2612 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 44,614 psi | 86% | 2582 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 90% | 44,875 psi | 86% | 2602 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 45,643 psi | 88% | 2664 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,866 psi | 65% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 44,860 psi | 86% | 2582 fps | 97.4% |
| IMR 3031 | <<locked>> | 94% | 44,469 psi | 85% | 2628 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 46,731 psi | 90% | 2598 fps | 96.8% |
| IMR 4198 | <<locked>> | 84% | 46,789 psi | 90% | 2523 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 45,658 psi | 88% | 2644 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 88% | 44,179 psi | 85% | 2556 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 86% | 46,369 psi | 89% | 2589 fps | 99% |
| Lovex D073.6 | <<locked>> | 92% | 45,034 psi | 86% | 2615 fps | 99.4% |
| Lovex S060 | <<locked>> | 90% | 45,803 psi | 88% | 2536 fps | 97% |
| Lovex S062 | <<locked>> | 96% | 46,543 psi | 89% | 2612 fps | 98.5% |
| Norma 201 | <<locked>> | 92% | 46,340 psi | 89% | 2595 fps | 98.4% |
| Norma 202 | <<locked>> | 92% | 46,151 psi | 89% | 2608 fps | 99.8% |
| Norma 203B | <<locked>> | 96% | 46,833 psi | 90% | 2654 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 94% | 44,208 psi | 85% | 2621 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 45,890 psi | 88% | 2621 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 86% | 45,542 psi | 87% | 2556 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,069 psi | 65% | 1650 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 46,804 psi | 90% | 2598 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 46,804 psi | 90% | 2717 fps | 96.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 44,106 psi | 85% | 2690 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 88% | 45,049 psi | 87% | 2552 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 94% | 46,760 psi | 90% | 2592 fps | 98.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 45,847 psi | 88% | 2638 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 92% | 45,034 psi | 86% | 2615 fps | 99.4% |
| Shooters World Precision | <<locked>> | 96% | 46,543 psi | 89% | 2612 fps | 98.5% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 46,717 psi | 90% | 2559 fps | 98% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 46,035 psi | 88% | 2595 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 45,469 psi | 87% | 2651 fps | 96.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 46,673 psi | 90% | 2566 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 45,759 psi | 88% | 2608 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 46,021 psi | 88% | 2516 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 44,947 psi | 86% | 2510 fps | 99.9% |
| Somchem S321 | <<locked>> | 86% | 44,570 psi | 86% | 2585 fps | 98.3% |
| Somchem S335 | <<locked>> | 90% | 44,802 psi | 86% | 2516 fps | 99.9% |
| Somchem S341 | <<locked>> | 90% | 44,367 psi | 85% | 2569 fps | 96.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 47,108 psi | 90% | 2644 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 86% | 46,050 psi | 88% | 2503 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 45,774 psi | 88% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 45,034 psi | 87% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 46,470 psi | 89% | 2585 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,368 psi | 87% | 2585 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 88% | 44,425 psi | 85% | 2556 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 94% | 44,991 psi | 86% | 2582 fps | 99.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 41,974 psi | 81% | 2520 fps | 96.2% |
| Winchester 748 | <<locked>> | 88% | 46,311 psi | 89% | 2654 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 86% | 46,528 psi | 89% | 2638 fps | 97.8% |
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% | 35,230 psi | 68% | 2356 fps | 99.7% |
| Accurate 2460 | <<locked>> | 80% | 38,247 psi | 74% | 2441 fps | 98.6% |
| Accurate 2495 | <<locked>> | 80% | 27,731 psi | 53% | 2251 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 32,213 psi | 62% | 2362 fps | 96.6% |
| Accurate 2520 | <<locked>> | 80% | 32,213 psi | 62% | 2362 fps | 96.6% |
| Accurate 4064 | <<locked>> | 80% | 26,281 psi | 50% | 2221 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 44,077 psi | 85% | 2448 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 80% | 44,454 psi | 85% | 2461 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 39,102 psi | 75% | 2484 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 94% | 42,569 psi | 82% | 2530 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 42,714 psi | 82% | 2543 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 34,287 psi | 66% | 2356 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 32,590 psi | 63% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 38,972 psi | 75% | 2530 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 36,303 psi | 70% | 2454 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,219 psi | 77% | 2457 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 41,785 psi | 80% | 2559 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 38,653 psi | 74% | 2559 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,714 psi | 82% | 2444 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 43,540 psi | 84% | 2585 fps | 95.2% |
| Bofors RP3 | <<locked>> | 90% | 35,549 psi | 68% | 2454 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 36,782 psi | 71% | 2369 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,792 psi | 61% | 2359 fps | 95.1% |
| Hodgdon CFE223 | <<locked>> | 86% | 43,120 psi | 83% | 2635 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 36,303 psi | 70% | 2421 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 80% | 41,742 psi | 80% | 2533 fps | 99.3% |
| Hodgdon H4895 | <<locked>> | 84% | 37,144 psi | 71% | 2451 fps | 95.4% |
| Hodgdon LEVERevolution | 25.6 gr | 88% | 35,534 psi | 68% | 2461 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,150 psi | 48% | 1437 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 37,550 psi | 72% | 2441 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 28,747 psi | 55% | 2300 fps | 97.9% |
| IMR 4064 | <<locked>> | 94% | 41,350 psi | 79% | 2500 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 41,669 psi | 80% | 2441 fps | 100% |
| IMR 4895 | 25 gr | 88% | 37,768 psi | 73% | 2493 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 34,287 psi | 66% | 2356 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 80% | 37,884 psi | 73% | 2438 fps | 97.4% |
| Lovex D073.6 | <<locked>> | 80% | 29,994 psi | 58% | 2310 fps | 95.8% |
| Lovex S060 | <<locked>> | 84% | 38,116 psi | 73% | 2392 fps | 95% |
| Lovex S062 | <<locked>> | 86% | 34,476 psi | 66% | 2379 fps | 95.5% |
| Norma 201 | <<locked>> | 82% | 33,968 psi | 65% | 2352 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 31,763 psi | 61% | 2323 fps | 97.2% |
| Norma 203B | <<locked>> | 90% | 38,769 psi | 74% | 2503 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 92% | 40,988 psi | 79% | 2559 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 40,263 psi | 77% | 2516 fps | 95.6% |
| Ramshot X-Terminator | <<locked>> | 82% | 40,089 psi | 77% | 2454 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,034 psi | 48% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,740 psi | 74% | 2451 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 40,843 psi | 78% | 2602 fps | 95.1% |
| ReloadSwiss RS 60 | 26.2 gr | 88% | 31,937 psi | 61% | 2405 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 35,389 psi | 68% | 2365 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 84% | 34,272 psi | 66% | 2352 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 92% | 35,462 psi | 68% | 2441 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 29,994 psi | 58% | 2310 fps | 95.8% |
| Shooters World Precision | <<locked>> | 86% | 34,476 psi | 66% | 2379 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 40,828 psi | 78% | 2457 fps | 96.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,105 psi | 83% | 2546 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 39,958 psi | 77% | 2546 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 41,046 psi | 79% | 2474 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 40,147 psi | 77% | 2503 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,794 psi | 65% | 2290 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 27,354 psi | 53% | 2156 fps | 96.6% |
| Somchem S321 | <<locked>> | 80% | 36,564 psi | 70% | 2431 fps | 96.4% |
| Somchem S335 | <<locked>> | 80% | 32,996 psi | 63% | 2290 fps | 98.2% |
| Somchem S341 | <<locked>> | 86% | 38,870 psi | 75% | 2467 fps | 95% |
| Somchem S355 | <<locked>> | 92% | 36,854 psi | 71% | 2454 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 38,421 psi | 74% | 2379 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 33,649 psi | 65% | 2300 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 80% | 28,660 psi | 55% | 2260 fps | 98.8% |
| Vihtavuori N140 | <<locked>> | 80% | 29,936 psi | 57% | 2264 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 90% | 32,924 psi | 63% | 2349 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 34,185 psi | 66% | 2352 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 28,601 psi | 55% | 2241 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 39,407 psi | 76% | 2467 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 35,462 psi | 68% | 2441 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,289 psi | 72% | 2467 fps | 95.4% |
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 75 powders for 6 mm ARC loaded with the .243 | 100gr | Speer Grand Slam. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,717 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,717 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 75 of the 75 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 1:10.5 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. Hodgdon LEVERevolution, ReloadSwiss RS 60, IMR 4895 rank at the top here: for 6 mm ARC with the .243 | 100gr | Speer Grand Slam 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.