Load Specifications
Load data in caliber .284 Win. with .284 | 140gr | Swift A-Frame bullet and 98 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, Hodgdon Superformance and Alliant Reloder-17.
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% | 55,347 psi | 87% | 2766 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,508 psi | 90% | 2841 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,711 psi | 90% | 2835 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,927 psi | 88% | 2858 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,768 psi | 89% | 2838 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 54,128 psi | 85% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,853 psi | 84% | 2917 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 54,433 psi | 85% | 2867 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,593 psi | 87% | 2867 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,884 psi | 89% | 2867 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,317 psi | 85% | 2795 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,317 psi | 85% | 2989 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,521 psi | 87% | 2887 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,318 psi | 88% | 2913 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2976 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,376 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,392 psi | 62% | 2707 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,251 psi | 69% | 2871 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,302 psi | 85% | 2884 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 56,420 psi | 88% | 2907 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,318 psi | 88% | 2874 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,259 psi | 87% | 2802 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,478 psi | 89% | 2900 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,607 psi | 86% | 2943 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 57,334 psi | 90% | 2920 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 98% | 56,927 psi | 89% | 2972 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 96% | 57,435 psi | 90% | 2930 fps | 97% |
| Hodgdon H4895 | <<locked>> | 86% | 54,998 psi | 86% | 2877 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,242 psi | 80% | 2848 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,607 psi | 86% | 2913 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,824 psi | 84% | 2946 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 56% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,507 psi | 89% | 2884 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,085 psi | 86% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,230 psi | 87% | 2851 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,187 psi | 86% | 2831 fps | 97.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2900 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,824 psi | 86% | 2854 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,331 psi | 85% | 2907 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 54,099 psi | 85% | 2890 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 56,884 psi | 89% | 2867 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,479 psi | 90% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,230 psi | 85% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,363 psi | 90% | 2844 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,042 psi | 86% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,638 psi | 90% | 2900 fps | 99.1% |
| Lovex S070 | <<locked>> | 98% | 54,911 psi | 86% | 2881 fps | 98% |
| Norma 201 | <<locked>> | 88% | 56,826 psi | 89% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,159 psi | 90% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,492 psi | 87% | 2900 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 2949 fps | 96.4% |
| Norma URPᴾ | <<locked>> | 100% | 56,507 psi | 89% | 2959 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 90% | 56,115 psi | 88% | 2927 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2956 fps | 98.6% |
| Ramshot TAC | <<locked>> | 86% | 57,363 psi | 90% | 2890 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,159 psi | 90% | 2910 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,505 psi | 85% | 2822 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,926 psi | 56% | 1795 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,550 psi | 89% | 2851 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,595 psi | 90% | 2900 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,666 psi | 89% | 2979 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,144 psi | 88% | 3012 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 2999 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 3025 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 54,534 psi | 85% | 2799 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,450 psi | 90% | 2864 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,956 psi | 88% | 2894 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,318 psi | 88% | 2874 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,638 psi | 90% | 2900 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,230 psi | 85% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,042 psi | 86% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,911 psi | 86% | 2881 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,244 psi | 85% | 2904 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,999 psi | 88% | 2871 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,405 psi | 88% | 2890 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,969 psi | 86% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,143 psi | 86% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,563 psi | 86% | 2802 fps | 97.6% |
| Somchem S321 | <<locked>> | 82% | 54,636 psi | 86% | 2848 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,624 psi | 90% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,390 psi | 87% | 2858 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,362 psi | 88% | 2894 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,923 psi | 80% | 2910 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,737 psi | 86% | 2717 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,201 psi | 87% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 57,130 psi | 90% | 2825 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,725 psi | 90% | 2838 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,201 psi | 85% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,492 psi | 87% | 2904 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 57,493 psi | 90% | 2867 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,028 psi | 88% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,404 psi | 85% | 2907 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,163 psi | 68% | 2782 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,999 psi | 88% | 2884 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,027 psi | 85% | 2867 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,927 psi | 89% | 2972 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,302 psi | 55% | 2703 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,318 psi | 88% | 2897 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% | 49,008 psi | 77% | 2674 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,824 psi | 84% | 2792 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,684 psi | 65% | 2602 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,950 psi | 77% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,746 psi | 73% | 2674 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,436 psi | 62% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,243 psi | 52% | 2520 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 45,295 psi | 71% | 2710 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 38,406 psi | 60% | 2556 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,384 psi | 74% | 2720 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,790 psi | 75% | 2703 fps | 100% |
| Alliant Power Pro 2000-MR | 45.2 gr | 80% | 41,060 psi | 64% | 2736 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,189 psi | 60% | 2582 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,017 psi | 64% | 2648 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,533 psi | 53% | 2530 fps | 95% |
| Alliant Reloder-17 | 44.5 gr | 80% | 32,808 psi | 51% | 2543 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,922 psi | 48% | 2490 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,679 psi | 56% | 2671 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,440 psi | 70% | 2713 fps | 98.3% |
| Bofors RP3 | <<locked>> | 80% | 37,739 psi | 59% | 2582 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 46,760 psi | 73% | 2713 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,907 psi | 77% | 2703 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,122 psi | 72% | 2740 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,068 psi | 80% | 2887 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 38,638 psi | 61% | 2589 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 43,540 psi | 68% | 2740 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 50,763 psi | 80% | 2822 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 45,745 psi | 72% | 2723 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,906 psi | 45% | 2379 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,785 psi | 65% | 2694 fps | 99.4% |
| Hodgdon Superformance | 54.1 gr | 92% | 46,499 psi | 73% | 2818 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 41% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,700 psi | 68% | 2671 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 45,295 psi | 71% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,321 psi | 63% | 2592 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,917 psi | 67% | 2615 fps | 95% |
| IMR 4350 | <<locked>> | 94% | 46,876 psi | 73% | 2740 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,498 psi | 71% | 2694 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 34,360 psi | 54% | 2530 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,032 psi | 66% | 2677 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 47,384 psi | 74% | 2720 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 53,795 psi | 84% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,570 psi | 70% | 2694 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,136 psi | 71% | 2644 fps | 99.2% |
| Lovex S062 | <<locked>> | 80% | 40,306 psi | 63% | 2595 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 40,001 psi | 63% | 2592 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 42,772 psi | 67% | 2667 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 44,208 psi | 69% | 2661 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 44,701 psi | 70% | 2671 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,393 psi | 63% | 2635 fps | 98.4% |
| Norma 204 | <<locked>> | 98% | 53,635 psi | 84% | 2890 fps | 95.6% |
| Norma URP | <<locked>> | 86% | 35,752 psi | 56% | 2575 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 39,740 psi | 62% | 2644 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 39,827 psi | 62% | 2671 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 47,195 psi | 74% | 2723 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,818 psi | 73% | 2746 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,923 psi | 80% | 2766 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 42% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,953 psi | 83% | 2799 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,698 psi | 65% | 2625 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,004 psi | 67% | 2746 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,925 psi | 55% | 2612 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,273 psi | 55% | 2592 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,000 psi | 60% | 2661 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,196 psi | 76% | 2700 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,090 psi | 66% | 2612 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,563 psi | 56% | 2526 fps | 97.9% |
| Rottweil R 907 | <<locked>> | 90% | 46,760 psi | 73% | 2713 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 40,001 psi | 63% | 2592 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,570 psi | 70% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,306 psi | 63% | 2595 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 42,772 psi | 67% | 2667 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,361 psi | 57% | 2572 fps | 97.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,643 psi | 72% | 2700 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,569 psi | 68% | 2677 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,730 psi | 72% | 2615 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,101 psi | 60% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,860 psi | 70% | 2641 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 51,213 psi | 80% | 2799 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,107 psi | 71% | 2615 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,266 psi | 71% | 2697 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 36,303 psi | 57% | 2533 fps | 97.9% |
| Somchem S365 | <<locked>> | 80% | 26,397 psi | 41% | 2359 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 51,561 psi | 81% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,079 psi | 72% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,800 psi | 66% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,235 psi | 66% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,577 psi | 54% | 2470 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 35,128 psi | 55% | 2526 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 47,340 psi | 74% | 2713 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,712 psi | 64% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,650 psi | 54% | 2530 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 33,272 psi | 52% | 2569 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,690 psi | 48% | 2395 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 47,021 psi | 74% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,787 psi | 69% | 2746 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,109 psi | 46% | 2507 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,279 psi | 68% | 2684 fps | 99.3% |
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 98 powders for .284 Win. loaded with the .284 | 140gr | Swift A-Frame. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,755 fps to 3,025 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 98 of the 98 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 1:13.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .284 Win. with the .284 | 140gr | Swift A-Frame 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.