Load Specifications
Bullet:.284 | 139gr | Hornady SP
Bullet Manufacturer:Hornady
Bullet Weight:139 gr
Bullet Diameter:0.284"
Bullet Length:<<locked>>
Caliber:.284 Win. load data
Case Length (l3):2.17"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:66 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.0
Load data in caliber .284 Win. with .284 | 139gr | Hornady SP bullet and 101 powders. The key underlying parameters are shown in the table above.
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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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% | 54,476 psi | 85% | 2759 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,666 psi | 89% | 2838 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,826 psi | 89% | 2831 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,071 psi | 86% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,144 psi | 88% | 2831 fps | 97% |
| Accurate 4064 | <<locked>> | 92% | 56,623 psi | 89% | 2877 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 2966 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 57,261 psi | 90% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,563 psi | 86% | 2858 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,101 psi | 88% | 2861 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,884 psi | 89% | 2835 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,956 psi | 89% | 3035 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,752 psi | 86% | 2884 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,595 psi | 90% | 2808 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,201 psi | 87% | 2904 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,114 psi | 85% | 2963 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,317 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,624 psi | 61% | 2694 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,149 psi | 68% | 2851 fps | 97.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,188 psi | 90% | 2930 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 55,317 psi | 87% | 2900 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,317 psi | 87% | 2864 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,534 psi | 85% | 2795 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,709 psi | 87% | 2894 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,537 psi | 90% | 2992 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 56,927 psi | 89% | 2854 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,231 psi | 88% | 2910 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 98% | 55,550 psi | 87% | 2956 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 96% | 56,434 psi | 88% | 2920 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 54,215 psi | 85% | 2871 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,183 psi | 79% | 2838 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,188 psi | 90% | 2956 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,695 psi | 89% | 2995 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,505 psi | 56% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,419 psi | 87% | 2874 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 57,740 psi | 90% | 2900 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 57,508 psi | 90% | 2890 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,215 psi | 85% | 2818 fps | 97.4% |
| IMR 4198 | <<locked>> | 82% | 57,479 psi | 90% | 2766 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2890 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 57,479 psi | 90% | 2900 fps | 97.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 2897 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 56,608 psi | 89% | 2933 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,101 psi | 88% | 2861 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,275 psi | 88% | 2844 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,145 psi | 90% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,623 psi | 89% | 2838 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 57,276 psi | 90% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,637 psi | 89% | 2890 fps | 98.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 2927 fps | 98.2% |
| Norma 201 | <<locked>> | 88% | 56,028 psi | 88% | 2858 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,376 psi | 88% | 2858 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,404 psi | 85% | 2890 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 56,434 psi | 88% | 2940 fps | 96% |
| Norma URPᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2949 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 55,042 psi | 86% | 2917 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,346 psi | 85% | 2946 fps | 98.4% |
| Ramshot TAC | <<locked>> | 86% | 56,376 psi | 88% | 2881 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,130 psi | 88% | 2900 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,058 psi | 89% | 2864 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1795 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,738 psi | 87% | 2844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,623 psi | 89% | 2890 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,840 psi | 88% | 2972 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,100 psi | 86% | 3002 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2986 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 3015 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 56,985 psi | 89% | 2838 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,289 psi | 88% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,172 psi | 86% | 2890 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,317 psi | 87% | 2864 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,637 psi | 89% | 2890 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,145 psi | 90% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,276 psi | 90% | 2887 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 2927 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,797 psi | 89% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,940 psi | 86% | 2861 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,666 psi | 87% | 2884 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,595 psi | 90% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,508 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 57,072 psi | 89% | 2841 fps | 97.9% |
| Somchem S321 | <<locked>> | 84% | 57,508 psi | 90% | 2897 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,855 psi | 89% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,317 psi | 85% | 2848 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,259 psi | 87% | 2884 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2897 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,261 psi | 90% | 2756 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,404 psi | 85% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,883 psi | 88% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,985 psi | 89% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,927 psi | 89% | 2864 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,447 psi | 85% | 2890 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 86% | 56,739 psi | 89% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,998 psi | 86% | 2831 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 2949 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,148 psi | 66% | 2769 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,824 psi | 86% | 2871 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,594 psi | 89% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,927 psi | 88% | 2959 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,679 psi | 54% | 2690 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,579 psi | 87% | 2894 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 48,153 psi | 75% | 2667 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,997 psi | 83% | 2785 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,089 psi | 64% | 2595 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,805 psi | 75% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,240 psi | 77% | 2720 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 38,899 psi | 61% | 2589 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,780 psi | 55% | 2566 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,541 psi | 70% | 2703 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 37,739 psi | 59% | 2546 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,630 psi | 73% | 2710 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 46,804 psi | 73% | 2697 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,379 psi | 63% | 2726 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,478 psi | 59% | 2572 fps | 98.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,186 psi | 85% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,292 psi | 63% | 2635 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,027 psi | 55% | 2575 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,271 psi | 51% | 2530 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,240 psi | 47% | 2474 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,391 psi | 59% | 2717 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,772 psi | 69% | 2707 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 37,014 psi | 58% | 2572 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 45,861 psi | 72% | 2700 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,167 psi | 75% | 2697 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,353 psi | 71% | 2730 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,256 psi | 79% | 2881 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 53,142 psi | 83% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,971 psi | 60% | 2579 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 92% | 45,600 psi | 71% | 2785 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 92% | 49,763 psi | 78% | 2808 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,991 psi | 71% | 2713 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,153 psi | 47% | 2418 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,756 psi | 64% | 2680 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 92% | 45,672 psi | 72% | 2805 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 41% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,975 psi | 67% | 2661 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 44,672 psi | 70% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,624 psi | 62% | 2582 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,846 psi | 70% | 2654 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 54,027 psi | 85% | 2720 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 45,948 psi | 72% | 2726 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,875 psi | 70% | 2684 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 33,692 psi | 53% | 2520 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 41,278 psi | 65% | 2667 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 46,630 psi | 73% | 2710 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 52,692 psi | 83% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,468 psi | 68% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,425 psi | 70% | 2635 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,581 psi | 62% | 2589 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 39,131 psi | 61% | 2575 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 44,773 psi | 70% | 2710 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 43,685 psi | 68% | 2654 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 43,903 psi | 69% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,668 psi | 62% | 2625 fps | 98.2% |
| Norma 204 | <<locked>> | 98% | 52,678 psi | 83% | 2881 fps | 95.2% |
| Norma URP | <<locked>> | 86% | 35,085 psi | 55% | 2566 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,088 psi | 61% | 2635 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 41,684 psi | 65% | 2717 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 46,572 psi | 73% | 2717 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,832 psi | 72% | 2733 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,212 psi | 79% | 2756 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 42% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,170 psi | 82% | 2792 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,584 psi | 68% | 2667 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,105 psi | 66% | 2736 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,360 psi | 54% | 2602 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,101 psi | 58% | 2638 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 39,798 psi | 62% | 2703 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,659 psi | 75% | 2697 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,597 psi | 65% | 2608 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,838 psi | 55% | 2516 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 45,861 psi | 72% | 2700 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,131 psi | 61% | 2575 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,468 psi | 68% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,581 psi | 62% | 2589 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 44,773 psi | 70% | 2710 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,723 psi | 56% | 2562 fps | 97% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,715 psi | 70% | 2687 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,888 psi | 67% | 2667 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,005 psi | 71% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,405 psi | 59% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,932 psi | 69% | 2628 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 50,488 psi | 79% | 2792 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,672 psi | 70% | 2612 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,556 psi | 70% | 2687 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,824 psi | 56% | 2526 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 27,659 psi | 43% | 2405 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 50,720 psi | 79% | 2667 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,281 psi | 71% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,973 psi | 64% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,481 psi | 65% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,953 psi | 53% | 2461 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 84% | 34,505 psi | 54% | 2516 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,586 psi | 73% | 2703 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,045 psi | 63% | 2585 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,187 psi | 57% | 2569 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 32,445 psi | 51% | 2549 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,211 psi | 47% | 2385 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 46,195 psi | 72% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 45,861 psi | 72% | 2789 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,429 psi | 48% | 2552 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,322 psi | 66% | 2671 fps | 99.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 118 powders for .284 Win. loaded with the .284 | 139gr | Hornady SP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,755 fps to 3,035 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Accurate High Country 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. As outliers, Accurate High Country, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.