Load Specifications
Load data in caliber 6mm-284 with .243 | 75gr | Impala LW CFN bullet and 65 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 54,926 psi | 88% | 3524 fps | 99.3% |
| Accurate 4350 | <<locked>> | 86% | 52,504 psi | 85% | 3524 fps | 99.8% |
| Accurate High Country | <<locked>> | 94% | 55,419 psi | 89% | 3675 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 53,621 psi | 86% | 3491 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 92% | 52,533 psi | 85% | 3543 fps | 96.9% |
| ADI AR 2213 | <<locked>> | 96% | 54,186 psi | 87% | 3602 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,113 psi | 86% | 3547 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,113 psi | 86% | 3547 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,810 psi | 88% | 3520 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,941 psi | 90% | 3648 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,388 psi | 86% | 3599 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,869 psi | 90% | 3602 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,012 psi | 87% | 3609 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,868 psi | 88% | 3606 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 3579 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,332 psi | 89% | 3698 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,953 psi | 85% | 3586 fps | 97.1% |
| Bofors RP5 | <<locked>> | 96% | 54,012 psi | 87% | 3609 fps | 97.5% |
| Bofors RP7 | <<locked>> | 86% | 55,259 psi | 89% | 3517 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 53,708 psi | 87% | 3563 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 84% | 53,098 psi | 86% | 3514 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,084 psi | 86% | 3494 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,705 psi | 80% | 3619 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 86% | 53,925 psi | 87% | 3593 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 60% | 2333 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,159 psi | 90% | 3547 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,011 psi | 85% | 3481 fps | 98.3% |
| IMR 4831 | <<locked>> | 88% | 52,707 psi | 85% | 3507 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 98% | 55,303 psi | 89% | 3638 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 53,954 psi | 87% | 3488 fps | 99.3% |
| Lovex S070 | <<locked>> | 88% | 55,405 psi | 89% | 3537 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 3478 fps | 99% |
| Norma 204 | <<locked>> | 88% | 53,693 psi | 86% | 3537 fps | 97% |
| Norma MRP | <<locked>> | 94% | 53,577 psi | 86% | 3635 fps | 98.6% |
| Norma URP | <<locked>> | 88% | 54,259 psi | 87% | 3560 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 88% | 53,127 psi | 86% | 3553 fps | 99.1% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,621 psi | 88% | 3586 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 61% | 2385 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,753 psi | 90% | 3530 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,678 psi | 85% | 3596 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,883 psi | 90% | 3602 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,664 psi | 86% | 3619 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 3619 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 82% | 53,026 psi | 85% | 3481 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,375 psi | 88% | 3517 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 94% | 55,463 psi | 89% | 3593 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 86% | 55,259 psi | 89% | 3517 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,954 psi | 87% | 3488 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 88% | 55,405 psi | 89% | 3537 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,838 psi | 87% | 3537 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,881 psi | 85% | 3346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,403 psi | 86% | 3425 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,998 psi | 89% | 3586 fps | 97.6% |
| Somchem S355 | <<locked>> | 84% | 56,173 psi | 90% | 3537 fps | 100% |
| Somchem S365 | <<locked>> | 90% | 54,056 psi | 87% | 3570 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,953 psi | 85% | 3501 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 84% | 53,679 psi | 86% | 3438 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,028 psi | 90% | 3553 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 98% | 55,651 psi | 90% | 3527 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 88% | 55,579 psi | 90% | 3560 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 94% | 54,201 psi | 87% | 3583 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,564 psi | 90% | 3497 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,998 psi | 87% | 3566 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,926 psi | 88% | 3743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,173 psi | 90% | 3547 fps | 97.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 37,289 psi | 60% | 3136 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 43,091 psi | 69% | 3320 fps | 98.5% |
| Accurate High Country | <<locked>> | 92% | 51,779 psi | 83% | 3596 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,531 psi | 81% | 3428 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 46,383 psi | 75% | 3409 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 50,662 psi | 82% | 3527 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 46,717 psi | 75% | 3412 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 46,717 psi | 75% | 3412 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,590 psi | 83% | 3465 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,625 psi | 65% | 3314 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,441 psi | 75% | 3465 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 46,224 psi | 74% | 3402 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 47,355 psi | 76% | 3468 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,111 psi | 50% | 3035 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 35,085 psi | 57% | 3166 fps | 95% |
| Alliant Reloder-26 | 53.2 gr | 80% | 33,547 psi | 54% | 3166 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 46,702 psi | 75% | 3451 fps | 95.5% |
| Bofors RP5 | <<locked>> | 92% | 47,355 psi | 76% | 3468 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 45,934 psi | 74% | 3320 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 80% | 44,237 psi | 71% | 3360 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 46,804 psi | 75% | 3379 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,551 psi | 62% | 3189 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 96% | 44,005 psi | 71% | 3468 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 43,453 psi | 70% | 3366 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,688 psi | 45% | 2096 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 44,005 psi | 71% | 3291 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,818 psi | 75% | 3350 fps | 97% |
| IMR 4831 | <<locked>> | 80% | 40,973 psi | 66% | 3255 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 51,924 psi | 84% | 3566 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 45,150 psi | 73% | 3304 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 43,410 psi | 70% | 3281 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 38,609 psi | 62% | 3173 fps | 95.8% |
| Norma 204 | <<locked>> | 84% | 46,891 psi | 76% | 3396 fps | 95.2% |
| Norma MRP | 55.6 gr | 86% | 40,915 psi | 66% | 3343 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 42,061 psi | 68% | 3301 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 80% | 40,785 psi | 66% | 3274 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 44,135 psi | 71% | 3363 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 45% | 2146 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,344 psi | 84% | 3461 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,168 psi | 79% | 3530 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,656 psi | 69% | 3330 fps | 98.2% |
| ReloadSwiss RS 70 | 52.8 gr | 80% | 41,002 psi | 66% | 3333 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 41,147 psi | 66% | 3373 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 49,864 psi | 80% | 3422 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 50,865 psi | 82% | 3445 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 45,643 psi | 74% | 3386 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 45,934 psi | 74% | 3320 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,150 psi | 73% | 3304 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 80% | 43,410 psi | 70% | 3281 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,415 psi | 81% | 3471 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,705 psi | 80% | 3294 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,121 psi | 71% | 3228 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 45,281 psi | 73% | 3383 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 49,821 psi | 80% | 3419 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 38,870 psi | 63% | 3258 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 43,656 psi | 70% | 3301 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,485 psi | 76% | 3327 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,308 psi | 70% | 3294 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 90% | 42,902 psi | 69% | 3264 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,047 psi | 69% | 3301 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 34,722 psi | 56% | 3133 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,482 psi | 68% | 3251 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 44,440 psi | 72% | 3363 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,920 psi | 45% | 3005 fps | 95.7% |
| Winchester Supreme 780 | <<locked>> | 90% | 45,818 psi | 74% | 3343 fps | 95.2% |
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 65 powders for 6mm-284 loaded with the .243 | 75gr | Impala LW CFN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,743 fps; across all powders the maximum-charge window runs from 2,333 fps to 3,743 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 65 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (428 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 75.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon Retumbo, 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 6mm-284 with the .243 | 75gr | Impala LW CFN 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.