Load Specifications
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:1:15.5
Load data in caliber .284 Win. with .284 | 139gr | Hornady InterLock FP bullet and 98 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.
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% | 57,305 psi | 90% | 2812 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,130 psi | 88% | 2838 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,027 psi | 85% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,013 psi | 86% | 2841 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,221 psi | 68% | 2733 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 56,173 psi | 88% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,289 psi | 88% | 2976 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 56,347 psi | 88% | 2920 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,305 psi | 90% | 2917 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,274 psi | 87% | 2867 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,463 psi | 88% | 2841 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,347 psi | 88% | 3045 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,682 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,607 psi | 86% | 2913 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,810 psi | 86% | 3012 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,075 psi | 64% | 2762 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,354 psi | 73% | 2936 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,217 psi | 88% | 2933 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 54,607 psi | 86% | 2904 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,578 psi | 86% | 2874 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,898 psi | 89% | 2851 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,723 psi | 86% | 2897 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,956 psi | 89% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,680 psi | 87% | 2920 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 55,361 psi | 87% | 2972 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 94% | 55,941 psi | 88% | 2933 fps | 97% |
| Hodgdon H4895 | <<locked>> | 86% | 56,985 psi | 89% | 2930 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,739 psi | 89% | 2966 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,057 psi | 88% | 3012 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 56% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,505 psi | 85% | 2877 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,159 psi | 90% | 2910 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,710 psi | 89% | 2900 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,811 psi | 89% | 2884 fps | 98.2% |
| IMR 4350 | <<locked>> | 98% | 54,998 psi | 86% | 2900 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,623 psi | 89% | 2907 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 2969 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 56,014 psi | 88% | 2943 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,274 psi | 87% | 2867 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,246 psi | 88% | 2894 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,666 psi | 87% | 2844 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,623 psi | 89% | 2897 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,159 psi | 88% | 2904 fps | 99.1% |
| Lovex S070 | <<locked>> | 98% | 56,971 psi | 89% | 2936 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 55,216 psi | 87% | 2864 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,579 psi | 87% | 2861 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,319 psi | 90% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,811 psi | 87% | 2953 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 46,006 psi | 72% | 2887 fps | 96% |
| Norma URP | <<locked>> | 98% | 55,085 psi | 86% | 2963 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 54,476 psi | 85% | 2923 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3012 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 55,419 psi | 87% | 2887 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,332 psi | 87% | 2907 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,927 psi | 88% | 2867 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,869 psi | 88% | 2900 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,013 psi | 86% | 2976 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,723 psi | 86% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,985 psi | 88% | 2999 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,201 psi | 87% | 3025 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 56,115 psi | 88% | 2844 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,419 psi | 87% | 2861 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,476 psi | 85% | 2897 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,578 psi | 86% | 2874 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,159 psi | 88% | 2904 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,246 psi | 88% | 2894 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,623 psi | 89% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,971 psi | 89% | 2936 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,507 psi | 89% | 2963 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,682 psi | 90% | 2920 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,636 psi | 86% | 2887 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,391 psi | 88% | 2799 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,623 psi | 89% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,231 psi | 88% | 2854 fps | 98.1% |
| Somchem S321 | <<locked>> | 82% | 56,449 psi | 88% | 2897 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,014 psi | 88% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,363 psi | 90% | 2910 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,897 psi | 86% | 2897 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 2963 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,371 psi | 77% | 2841 fps | 96.3% |
| Vihtavuori N130 | <<locked>> | 82% | 56,057 psi | 88% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,666 psi | 89% | 2782 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,317 psi | 87% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,289 psi | 88% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,202 psi | 88% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,711 psi | 90% | 2956 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,753 psi | 87% | 2867 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,201 psi | 85% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,739 psi | 89% | 2963 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,310 psi | 71% | 2841 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 54,056 psi | 85% | 2881 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,680 psi | 87% | 2913 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,361 psi | 87% | 2972 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,854 psi | 58% | 2772 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,795 psi | 86% | 2900 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,705 psi | 79% | 2720 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,308 psi | 68% | 2644 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,676 psi | 79% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 48,312 psi | 76% | 2726 fps | 95.8% |
| Accurate 3100 | <<locked>> | 98% | 40,335 psi | 63% | 2677 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 40,973 psi | 64% | 2641 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 34,722 psi | 54% | 2575 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 46,746 psi | 73% | 2759 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 39,697 psi | 62% | 2605 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,791 psi | 76% | 2766 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,327 psi | 77% | 2746 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,699 psi | 67% | 2795 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,595 psi | 62% | 2631 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,380 psi | 66% | 2694 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 34,780 psi | 55% | 2589 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,055 psi | 53% | 2598 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,139 psi | 47% | 2487 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,333 psi | 59% | 2736 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,890 psi | 72% | 2762 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 39,334 psi | 62% | 2638 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 45,397 psi | 71% | 2713 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,328 psi | 79% | 2749 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,993 psi | 75% | 2792 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,113 psi | 83% | 2943 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,900 psi | 63% | 2635 fps | 96.8% |
| Hodgdon H414 | <<locked>> | 88% | 42,525 psi | 67% | 2743 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 90% | 49,081 psi | 77% | 2818 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 47,181 psi | 74% | 2772 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 29,994 psi | 47% | 2428 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,105 psi | 68% | 2740 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 45,150 psi | 71% | 2815 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 42% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,063 psi | 71% | 2717 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 47,050 psi | 74% | 2762 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,713 psi | 65% | 2641 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,077 psi | 69% | 2661 fps | 95.6% |
| IMR 4350 | <<locked>> | 92% | 45,571 psi | 71% | 2740 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,208 psi | 69% | 2694 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 33,649 psi | 53% | 2530 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 43,439 psi | 68% | 2726 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 48,791 psi | 76% | 2766 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,021 psi | 72% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,514 psi | 73% | 2694 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 41,727 psi | 65% | 2644 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 38,841 psi | 61% | 2585 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 41,872 psi | 66% | 2671 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,687 psi | 72% | 2710 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 46,195 psi | 72% | 2717 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,756 psi | 65% | 2684 fps | 98.8% |
| Norma 204 | <<locked>> | 96% | 51,953 psi | 81% | 2890 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 43,105 psi | 68% | 2828 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 34,969 psi | 55% | 2575 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 41,466 psi | 65% | 2697 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 38,899 psi | 61% | 2671 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,588 psi | 76% | 2772 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,312 psi | 76% | 2795 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,344 psi | 82% | 2812 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 42% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,219 psi | 63% | 2615 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,802 psi | 70% | 2802 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,245 psi | 57% | 2664 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,403 psi | 54% | 2589 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,796 psi | 58% | 2654 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,806 psi | 78% | 2749 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,555 psi | 68% | 2661 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 36,927 psi | 58% | 2579 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 45,397 psi | 71% | 2713 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,841 psi | 61% | 2585 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,021 psi | 72% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,727 psi | 65% | 2644 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 41,872 psi | 66% | 2671 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,811 psi | 59% | 2628 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,123 psi | 74% | 2749 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,107 psi | 71% | 2726 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,978 psi | 74% | 2657 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,247 psi | 62% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,468 psi | 68% | 2638 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 52,765 psi | 83% | 2844 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,528 psi | 73% | 2657 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,688 psi | 73% | 2743 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 37,623 psi | 59% | 2582 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 27,427 psi | 43% | 2408 fps | 96.1% |
| Somchem S385 | <<locked>> | 98% | 46,253 psi | 72% | 2785 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 52,910 psi | 83% | 2717 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,355 psi | 74% | 2651 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,178 psi | 68% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,656 psi | 68% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,853 psi | 56% | 2516 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 34,142 psi | 54% | 2523 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 49,023 psi | 77% | 2762 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,989 psi | 66% | 2638 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 35,926 psi | 56% | 2575 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 90% | 32,532 psi | 51% | 2566 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,662 psi | 50% | 2441 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 48,689 psi | 76% | 2805 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,525 psi | 67% | 2743 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 94% | 30,356 psi | 48% | 2572 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,788 psi | 70% | 2733 fps | 99.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 117 powders for .284 Win. loaded with the .284 | 139gr | Hornady InterLock FP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,045 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.284" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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 2213, Alliant Reloder-22 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.