Load Specifications
Load data in caliber .284 Win. with .284 | 140gr | Sellier & Bellot FMJ bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Hodgdon Superformance.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 55,172 psi | 86% | 2759 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,334 psi | 90% | 2838 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,580 psi | 90% | 2831 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,753 psi | 87% | 2854 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,724 psi | 89% | 2835 fps | 97.2% |
| Accurate 4064 | <<locked>> | 92% | 57,348 psi | 90% | 2877 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,392 psi | 90% | 2969 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 54,317 psi | 85% | 2864 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,172 psi | 86% | 2858 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,739 psi | 89% | 2864 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,667 psi | 90% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,653 psi | 90% | 3038 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,405 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,840 psi | 88% | 2904 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,752 psi | 86% | 2969 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,318 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,102 psi | 61% | 2697 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,947 psi | 69% | 2864 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,186 psi | 85% | 2877 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 55,999 psi | 88% | 2900 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,898 psi | 88% | 2864 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,129 psi | 86% | 2799 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,347 psi | 88% | 2897 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,491 psi | 85% | 2940 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 57,276 psi | 90% | 2851 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,913 psi | 89% | 2910 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 98% | 56,536 psi | 89% | 2966 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 96% | 57,072 psi | 89% | 2923 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 54,839 psi | 86% | 2871 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,140 psi | 80% | 2844 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,128 psi | 85% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,595 psi | 90% | 3005 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 56% | 1752 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,057 psi | 88% | 2874 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,911 psi | 86% | 2858 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,737 psi | 86% | 2844 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,781 psi | 86% | 2825 fps | 97.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2890 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,404 psi | 85% | 2848 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,259 psi | 85% | 2904 fps | 99.6% |
| IMR 4895 | <<locked>> | 90% | 57,261 psi | 90% | 2936 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,739 psi | 89% | 2864 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,942 psi | 89% | 2848 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,056 psi | 85% | 2838 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,232 psi | 90% | 2838 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,534 psi | 85% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,217 psi | 90% | 2890 fps | 99% |
| Lovex S070 | <<locked>> | 98% | 54,853 psi | 86% | 2877 fps | 97.9% |
| Norma 201 | <<locked>> | 88% | 56,652 psi | 89% | 2861 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,043 psi | 89% | 2858 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,071 psi | 86% | 2890 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2943 fps | 96.3% |
| Norma URPᴾ | <<locked>> | 100% | 56,086 psi | 88% | 2953 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,651 psi | 87% | 2917 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,911 psi | 86% | 2946 fps | 98.6% |
| Ramshot TAC | <<locked>> | 86% | 57,290 psi | 90% | 2887 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,724 psi | 89% | 2900 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,638 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 56% | 1791 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,043 psi | 88% | 2841 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,174 psi | 90% | 2894 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,565 psi | 89% | 2976 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,072 psi | 88% | 3009 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,942 psi | 89% | 2989 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 3018 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 86% | 57,319 psi | 90% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,913 psi | 89% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,825 psi | 87% | 2890 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,898 psi | 88% | 2864 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,217 psi | 90% | 2890 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,056 psi | 85% | 2838 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,534 psi | 85% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,853 psi | 86% | 2877 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,464 psi | 90% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,579 psi | 87% | 2861 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,260 psi | 88% | 2887 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,491 psi | 85% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,665 psi | 86% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,172 psi | 85% | 2795 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 54,476 psi | 85% | 2844 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,493 psi | 90% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,259 psi | 87% | 2854 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,883 psi | 88% | 2884 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 2900 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,595 psi | 90% | 2753 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,723 psi | 86% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,594 psi | 89% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,638 psi | 90% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,522 psi | 90% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,071 psi | 86% | 2894 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 57,392 psi | 90% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,579 psi | 87% | 2831 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 57,740 psi | 90% | 2953 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,062 psi | 67% | 2779 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,651 psi | 87% | 2877 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 57,276 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,536 psi | 89% | 2966 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,085 psi | 55% | 2697 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,188 psi | 88% | 2894 fps | 100% |
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% | 48,834 psi | 77% | 2671 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,330 psi | 84% | 2782 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,510 psi | 65% | 2595 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,472 psi | 76% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,615 psi | 73% | 2671 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,233 psi | 61% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,317 psi | 55% | 2569 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 44,904 psi | 70% | 2700 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,276 psi | 60% | 2552 fps | 97.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,934 psi | 74% | 2710 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,558 psi | 75% | 2700 fps | 100% |
| Alliant Power Pro 2000-MR | 45 gr | 80% | 40,930 psi | 64% | 2733 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,782 psi | 59% | 2572 fps | 98.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,582 psi | 64% | 2635 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,462 psi | 56% | 2582 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,721 psi | 51% | 2536 fps | 96.6% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,647 psi | 48% | 2480 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,058 psi | 60% | 2730 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,338 psi | 69% | 2707 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 37,565 psi | 59% | 2579 fps | 98.6% |
| Bofors RP7 | <<locked>> | 90% | 46,398 psi | 73% | 2707 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,747 psi | 76% | 2700 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,963 psi | 72% | 2733 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,618 psi | 79% | 2877 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 53,838 psi | 84% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,508 psi | 60% | 2582 fps | 96.2% |
| Hodgdon H414 | <<locked>> | 90% | 43,453 psi | 68% | 2736 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 50,343 psi | 79% | 2815 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 45,295 psi | 71% | 2713 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,618 psi | 48% | 2425 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,365 psi | 65% | 2684 fps | 99.3% |
| Hodgdon Superformance | 53.9 gr | 92% | 46,485 psi | 73% | 2815 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,368 psi | 41% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,526 psi | 68% | 2664 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 45,063 psi | 71% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,147 psi | 63% | 2585 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,368 psi | 71% | 2661 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 46,775 psi | 73% | 2736 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,397 psi | 71% | 2687 fps | 95.5% |
| IMR 4831 | <<locked>> | 86% | 34,200 psi | 54% | 2526 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,582 psi | 65% | 2667 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 46,934 psi | 74% | 2710 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 53,330 psi | 84% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,106 psi | 69% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,991 psi | 71% | 2641 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 40,118 psi | 63% | 2592 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,653 psi | 62% | 2582 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 42,699 psi | 67% | 2661 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 44,034 psi | 69% | 2654 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 44,222 psi | 69% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,972 psi | 63% | 2625 fps | 98.3% |
| Norma 204 | <<locked>> | 98% | 53,243 psi | 83% | 2884 fps | 95.5% |
| Norma URP | <<locked>> | 86% | 35,621 psi | 56% | 2572 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,624 psi | 62% | 2638 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 39,726 psi | 62% | 2667 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 46,833 psi | 73% | 2717 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,427 psi | 73% | 2736 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,763 psi | 80% | 2759 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 42% | 1601 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,808 psi | 83% | 2795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,336 psi | 65% | 2618 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,801 psi | 67% | 2740 fps | 98.4% |
| ReloadSwiss RS 60 | 44.3 gr | 80% | 34,809 psi | 55% | 2605 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,157 psi | 55% | 2585 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,695 psi | 59% | 2651 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 47,979 psi | 75% | 2697 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,901 psi | 66% | 2605 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,418 psi | 56% | 2523 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 46,398 psi | 73% | 2707 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,653 psi | 62% | 2582 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,106 psi | 69% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,118 psi | 63% | 2592 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,699 psi | 67% | 2661 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,216 psi | 57% | 2569 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,237 psi | 71% | 2690 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,439 psi | 68% | 2671 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,310 psi | 71% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,695 psi | 59% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,527 psi | 70% | 2635 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 51,097 psi | 80% | 2795 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,947 psi | 70% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,136 psi | 71% | 2690 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 36,158 psi | 57% | 2526 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 26,266 psi | 41% | 2352 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 51,068 psi | 80% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,585 psi | 71% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,336 psi | 65% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,076 psi | 66% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,461 psi | 54% | 2467 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 34,780 psi | 55% | 2516 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 47,195 psi | 74% | 2707 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,596 psi | 64% | 2589 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,695 psi | 57% | 2575 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 92% | 32,938 psi | 52% | 2559 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,589 psi | 48% | 2388 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 46,847 psi | 73% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,453 psi | 68% | 2736 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,821 psi | 48% | 2562 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,873 psi | 67% | 2674 fps | 99.2% |
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 99 powders for .284 Win. loaded with the .284 | 140gr | Sellier & Bellot FMJ. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,038 fps; across all powders the maximum-charge window runs from 1,752 fps to 3,038 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 Power Pro 2000-MR, ReloadSwiss RS 60, Hodgdon Superformance rank at the top here: for .284 Win. with the .284 | 140gr | Sellier & Bellot FMJ 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.