Load Specifications
Bullet:.284 | 140gr | Barnes MRX BT
Bullet Manufacturer:Barnes
Bullet Weight:140 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:1:11.5
Load data in caliber .284 Win. with .284 | 140gr | Barnes MRX BT bullet and 104 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>> | 86% | 56,637 psi | 89% | 2782 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,969 psi | 86% | 2808 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,042 psi | 86% | 2805 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 57,334 psi | 90% | 2877 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,868 psi | 86% | 2808 fps | 96.8% |
| Accurate 4064 | <<locked>> | 92% | 54,969 psi | 86% | 2854 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2936 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 55,927 psi | 88% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 57,058 psi | 89% | 2887 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,158 psi | 86% | 2841 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,738 psi | 87% | 2815 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,985 psi | 89% | 2949 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,738 psi | 87% | 3009 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 57,072 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,434 psi | 88% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 57,551 psi | 90% | 2933 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,910 psi | 83% | 2940 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,360 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,594 psi | 59% | 2667 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,829 psi | 66% | 2818 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,927 psi | 88% | 2907 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 57,595 psi | 90% | 2927 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 57,740 psi | 90% | 2894 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,884 psi | 89% | 2825 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,273 psi | 85% | 2867 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 56,550 psi | 89% | 2972 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 55,564 psi | 87% | 2831 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,753 psi | 89% | 2861 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,158 psi | 86% | 2887 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 54,578 psi | 86% | 2936 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 96% | 55,259 psi | 87% | 2894 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 56,478 psi | 89% | 2897 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,197 psi | 77% | 2815 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,159 psi | 88% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,477 psi | 87% | 2972 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 55% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,534 psi | 85% | 2854 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 56,565 psi | 89% | 2881 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 56,550 psi | 89% | 2871 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,623 psi | 89% | 2851 fps | 97.9% |
| IMR 4198 | <<locked>> | 82% | 56,623 psi | 89% | 2749 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2864 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,289 psi | 88% | 2874 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2874 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 55,535 psi | 87% | 2913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,158 psi | 86% | 2841 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,984 psi | 86% | 2822 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,535 psi | 87% | 2864 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,738 psi | 87% | 2818 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 56,130 psi | 88% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,245 psi | 87% | 2864 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2897 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 54,447 psi | 85% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,274 psi | 87% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,681 psi | 89% | 2917 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 2917 fps | 95.9% |
| Norma URPᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2923 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 92% | 57,508 psi | 90% | 2946 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,069 psi | 83% | 2920 fps | 98.2% |
| Ramshot TAC | <<locked>> | 86% | 55,477 psi | 87% | 2861 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,129 psi | 86% | 2881 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,072 psi | 88% | 2844 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,534 psi | 56% | 1785 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,404 psi | 85% | 2818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,332 psi | 87% | 2867 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,389 psi | 85% | 2946 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,172 psi | 85% | 2982 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,795 psi | 86% | 2959 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2989 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 86% | 55,216 psi | 87% | 2812 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,071 psi | 86% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 57,450 psi | 90% | 2917 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 57,740 psi | 90% | 2894 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,245 psi | 87% | 2864 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,535 psi | 87% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 56,130 psi | 88% | 2864 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 56,159 psi | 88% | 2897 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,854 psi | 88% | 2930 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,624 psi | 90% | 2815 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 57,624 psi | 90% | 2894 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,389 psi | 85% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,260 psi | 88% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 56,579 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,072 psi | 88% | 2822 fps | 97.8% |
| Somchem S321 | <<locked>> | 84% | 56,420 psi | 88% | 2877 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,463 psi | 87% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 57,072 psi | 89% | 2881 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 57,566 psi | 90% | 2910 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 2871 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 56,231 psi | 88% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,521 psi | 89% | 2756 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,694 psi | 86% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,956 psi | 88% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,869 psi | 88% | 2844 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,971 psi | 89% | 2923 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 55,695 psi | 87% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 57,653 psi | 90% | 2861 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 2927 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,886 psi | 64% | 2743 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,650 psi | 84% | 2851 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,550 psi | 87% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,578 psi | 86% | 2936 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,446 psi | 52% | 2651 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,215 psi | 85% | 2867 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 46,891 psi | 73% | 2644 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,358 psi | 80% | 2759 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,102 psi | 61% | 2559 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,543 psi | 73% | 2720 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,964 psi | 75% | 2697 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,999 psi | 58% | 2552 fps | 99.9% |
| Accurate 4350 | <<locked>> | 86% | 33,417 psi | 52% | 2530 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,497 psi | 68% | 2677 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 36,796 psi | 58% | 2523 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,614 psi | 71% | 2690 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,629 psi | 72% | 2674 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 53,461 psi | 84% | 2897 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,407 psi | 62% | 2700 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,361 psi | 57% | 2546 fps | 98.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,982 psi | 83% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,175 psi | 61% | 2612 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,084 psi | 53% | 2549 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,270 psi | 49% | 2500 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,067 psi | 49% | 2497 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,318 psi | 57% | 2687 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,540 psi | 67% | 2677 fps | 97.9% |
| Bofors RP3 | <<locked>> | 80% | 35,694 psi | 56% | 2543 fps | 98.1% |
| Bofors RP7 | <<locked>> | 92% | 47,659 psi | 75% | 2730 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,239 psi | 74% | 2677 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,237 psi | 69% | 2707 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,878 psi | 77% | 2851 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 80% | 52,127 psi | 82% | 2782 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 53,069 psi | 83% | 2808 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,811 psi | 58% | 2549 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 92% | 44,599 psi | 70% | 2762 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 94% | 51,982 psi | 81% | 2841 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 43,859 psi | 69% | 2690 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,138 psi | 46% | 2388 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,697 psi | 62% | 2654 fps | 99% |
| Hodgdon Superformance | <<locked>> | 94% | 47,979 psi | 75% | 2844 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 41% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,047 psi | 66% | 2638 fps | 99% |
| IMR 3031 | <<locked>> | 80% | 43,192 psi | 68% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,624 psi | 61% | 2556 fps | 97.5% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,918 psi | 69% | 2635 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 53,142 psi | 83% | 2700 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 47,877 psi | 75% | 2756 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,005 psi | 69% | 2664 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 34,737 psi | 54% | 2543 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,118 psi | 63% | 2641 fps | 98.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,614 psi | 71% | 2690 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 51,358 psi | 80% | 2769 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,192 psi | 66% | 2654 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,497 psi | 68% | 2615 fps | 98.9% |
| Lovex S062 | <<locked>> | 80% | 38,392 psi | 60% | 2559 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 40,437 psi | 63% | 2602 fps | 95.7% |
| Lovex S070 | <<locked>> | 92% | 43,613 psi | 68% | 2684 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 42,192 psi | 66% | 2625 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 42,801 psi | 67% | 2641 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,551 psi | 60% | 2598 fps | 98% |
| Norma 204 | <<locked>> | 98% | 51,474 psi | 81% | 2854 fps | 95% |
| Norma URP | <<locked>> | 86% | 34,026 psi | 53% | 2536 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,043 psi | 60% | 2608 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 92% | 40,698 psi | 64% | 2690 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,339 psi | 71% | 2690 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,860 psi | 70% | 2710 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,269 psi | 77% | 2736 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,324 psi | 41% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,169 psi | 80% | 2769 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,554 psi | 67% | 2644 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,002 psi | 64% | 2710 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,344 psi | 52% | 2572 fps | 99% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,737 psi | 56% | 2605 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,624 psi | 61% | 2674 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 46,209 psi | 72% | 2671 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,321 psi | 63% | 2579 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 33,547 psi | 53% | 2484 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 47,659 psi | 75% | 2730 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,437 psi | 63% | 2602 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,192 psi | 66% | 2654 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,392 psi | 60% | 2559 fps | 98.9% |
| Shooters World SW4350 | <<locked>> | 92% | 43,613 psi | 68% | 2684 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,708 psi | 54% | 2536 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 54,085 psi | 85% | 2766 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,555 psi | 68% | 2661 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,872 psi | 66% | 2644 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,918 psi | 69% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,390 psi | 57% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,701 psi | 72% | 2657 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 49,095 psi | 77% | 2766 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,294 psi | 68% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,279 psi | 68% | 2661 fps | 98.8% |
| Somchem S355 | <<locked>> | 80% | 34,418 psi | 54% | 2493 fps | 97.3% |
| Somchem S365 | <<locked>> | 82% | 26,585 psi | 42% | 2369 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 49,676 psi | 78% | 2648 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,280 psi | 69% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,755 psi | 62% | 2566 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,437 psi | 63% | 2572 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,837 psi | 51% | 2434 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 35,694 psi | 56% | 2543 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,527 psi | 71% | 2680 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,972 psi | 61% | 2562 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 35,056 psi | 55% | 2543 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 94% | 33,330 psi | 52% | 2572 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,138 psi | 46% | 2352 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 45,150 psi | 71% | 2726 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,599 psi | 70% | 2762 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,256 psi | 49% | 2579 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,263 psi | 65% | 2648 fps | 98.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 120 powders for .284 Win. loaded with the .284 | 140gr | Barnes MRX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,009 fps; across all powders the maximum-charge window runs from 1,745 fps to 3,009 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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 3100, 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.