Load Specifications
Load data in caliber 6 x 45 mm with .243 | 90gr | Sierra FMJBT GameKing bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon H322, SNPE Vectan SP 10 and ADI AR 2219.
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: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 46,847 psi | 85% | 2467 fps | 99.9% |
| Accurate 2015ᴾ | <<locked>> | 100% | 48,907 psi | 89% | 2579 fps | 99.7% |
| Accurate 2460 | <<locked>> | 96% | 47,761 psi | 87% | 2582 fps | 97.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,927 psi | 67% | 2454 fps | 98.4% |
| Accurate 2520ᴾ | <<locked>> | 100% | 47,732 psi | 87% | 2618 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 90% | 47,268 psi | 86% | 2470 fps | 98.7% |
| Accurate LT-32 | <<locked>> | 90% | 47,790 psi | 87% | 2477 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 90% | 49,443 psi | 90% | 2556 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 48,022 psi | 87% | 2605 fps | 98.7% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 45,527 psi | 83% | 2612 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 96% | 49,647 psi | 90% | 2605 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 48,733 psi | 88% | 2530 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 48,559 psi | 88% | 2510 fps | 99.1% |
| Hodgdon Benchmark | <<locked>> | 98% | 48,921 psi | 89% | 2546 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 96% | 49,356 psi | 90% | 2628 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 94% | 46,905 psi | 85% | 2592 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 88% | 49,530 psi | 90% | 2516 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,749 psi | 58% | 1549 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 43,381 psi | 79% | 2589 fps | 98.7% |
| IMR 4198 | <<locked>> | 94% | 49,023 psi | 89% | 2549 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 46,543 psi | 84% | 2444 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 48,863 psi | 89% | 2602 fps | 97.2% |
| Lovex D073.5 | <<locked>> | 96% | 47,732 psi | 87% | 2579 fps | 96.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,655 psi | 76% | 2533 fps | 95.8% |
| Lovex S053 | <<locked>> | 84% | 48,399 psi | 88% | 2444 fps | 100% |
| Norma 200 | <<locked>> | 90% | 47,514 psi | 86% | 2556 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 44,164 psi | 80% | 2549 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,879 psi | 58% | 1591 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 84% | 49,400 psi | 90% | 2523 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 48,689 psi | 88% | 2592 fps | 97% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 48,414 psi | 88% | 2582 fps | 97.8% |
| Shooters World AR Plus | <<locked>> | 90% | 48,863 psi | 89% | 2602 fps | 97.2% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,655 psi | 76% | 2533 fps | 95.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 49,617 psi | 90% | 2316 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 48,008 psi | 87% | 2602 fps | 97.8% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 48,399 psi | 88% | 2579 fps | 99.3% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 48,124 psi | 87% | 2513 fps | 97.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,508 psi | 70% | 2369 fps | 96.6% |
| Somchem S321 | <<locked>> | 98% | 49,443 psi | 90% | 2628 fps | 95.9% |
| Somchem S335ᴾ | <<locked>> | 100% | 45,876 psi | 83% | 2507 fps | 98.2% |
| Vihtavuori N120 | <<locked>> | 90% | 49,603 psi | 90% | 2513 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 47,935 psi | 87% | 2520 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 47,094 psi | 85% | 2520 fps | 99.5% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 39,030 psi | 71% | 2474 fps | 98.7% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,771 psi | 76% | 2480 fps | 96.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 39,929 psi | 72% | 2461 fps | 95.8% |
| Winchester 748ᴾ | <<locked>> | 100% | 46,905 psi | 85% | 2615 fps | 95.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 22"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 40,988 psi | 74% | 2372 fps | 99.4% |
| Accurate 2015 | <<locked>> | 82% | 27,978 psi | 51% | 2175 fps | 95% |
| Accurate 2460 | <<locked>> | 90% | 39,291 psi | 71% | 2438 fps | 95.6% |
| Accurate 2495 | <<locked>> | 90% | 26,701 psi | 48% | 2224 fps | 95.1% |
| Accurate 2520 | <<locked>> | 96% | 41,379 psi | 75% | 2516 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 35,172 psi | 64% | 2247 fps | 96% |
| Accurate LT-32 | <<locked>> | 84% | 40,118 psi | 73% | 2343 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 36,767 psi | 67% | 2352 fps | 100% |
| ADI AR 2219 | 19.7 gr | 82% | 34,534 psi | 63% | 2352 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 24,453 psi | 44% | 2136 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,414 psi | 55% | 2244 fps | 97.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 38,189 psi | 69% | 2352 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,156 psi | 60% | 2231 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 96% | 46,470 psi | 84% | 2507 fps | 95.5% |
| Hodgdon H322 | 19.5 gr | 84% | 33,634 psi | 61% | 2329 fps | 95.1% |
| Hodgdon H335 | <<locked>> | 88% | 38,334 psi | 70% | 2438 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 38,783 psi | 70% | 2333 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,685 psi | 43% | 1391 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 31,647 psi | 57% | 2343 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 32,880 psi | 60% | 2254 fps | 98.7% |
| IMR 4227 | <<locked>> | 80% | 43,947 psi | 80% | 2405 fps | 100% |
| Lovex D073.4 | <<locked>> | 86% | 42,337 psi | 77% | 2493 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 94% | 44,527 psi | 81% | 2526 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 98% | 39,320 psi | 71% | 2490 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 43,366 psi | 79% | 2372 fps | 100% |
| Norma 200 | <<locked>> | 80% | 34,679 psi | 63% | 2326 fps | 99% |
| Norma 202 | <<locked>> | 94% | 36,405 psi | 66% | 2402 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,438 psi | 43% | 1421 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 43,685 psi | 79% | 2438 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 43,120 psi | 78% | 2500 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 92% | 38,087 psi | 69% | 2398 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 86% | 42,337 psi | 77% | 2493 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 98% | 39,320 psi | 71% | 2490 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,350 psi | 73% | 2192 fps | 100% |
| SNPE Vectan SP 10 | 20.9 gr | 84% | 37,260 psi | 68% | 2408 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,343 psi | 57% | 2251 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 37,463 psi | 68% | 2329 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 34,026 psi | 62% | 2277 fps | 95.2% |
| Somchem S321 | <<locked>> | 96% | 46,224 psi | 84% | 2575 fps | 95.2% |
| Somchem S335 | <<locked>> | 90% | 34,287 psi | 62% | 2293 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 36,970 psi | 67% | 2320 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,689 psi | 54% | 2175 fps | 96.7% |
| Vihtavuori N133 | <<locked>> | 84% | 29,225 psi | 53% | 2175 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 90% | 28,790 psi | 52% | 2244 fps | 95.5% |
| Vihtavuori N140 | <<locked>> | 96% | 36,999 psi | 67% | 2388 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 98% | 37,869 psi | 69% | 2421 fps | 95.1% |
| Winchester 748 | <<locked>> | 98% | 43,830 psi | 80% | 2562 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 47 powders for 6 x 45 mm loaded with the .243 | 90gr | Sierra FMJBT GameKing. Hodgdon H322 delivers the highest muzzle velocity at 2,628 fps; across all powders the maximum-charge window runs from 1,549 fps to 2,628 fps. Accurate 2015 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (380 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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 H322, SNPE Vectan SP 10, ADI AR 2219 rank at the top here: for 6 x 45 mm with the .243 | 90gr | Sierra FMJBT GameKing 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.