Load Specifications
Bullet:.284 | 120gr | Barnes X BT
Bullet Manufacturer:Barnes
Bullet Weight:120 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 | 120gr | Barnes X BT 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.
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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>> | 86% | 56,304 psi | 88% | 2976 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,143 psi | 86% | 3002 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,753 psi | 87% | 3009 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,695 psi | 89% | 3061 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 55,187 psi | 86% | 3048 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,722 psi | 84% | 3100 fps | 98.4% |
| Accurate LT-30 | <<locked>> | 82% | 57,740 psi | 90% | 2953 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 55,172 psi | 86% | 3064 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 55,724 psi | 87% | 3054 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,493 psi | 90% | 3071 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,375 psi | 85% | 3002 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,811 psi | 87% | 3130 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,998 psi | 85% | 3166 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,637 psi | 87% | 3084 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,753 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,478 psi | 89% | 3107 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,430 psi | 81% | 3091 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,130 psi | 88% | 3199 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,666 psi | 59% | 2812 fps | 96.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,232 psi | 90% | 2949 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,462 psi | 85% | 3068 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 56,710 psi | 89% | 3104 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,869 psi | 88% | 3002 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,913 psi | 89% | 3100 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,810 psi | 86% | 3143 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 54,650 psi | 86% | 3018 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,796 psi | 87% | 3045 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,537 psi | 90% | 3107 fps | 98.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3143 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 88% | 55,651 psi | 87% | 3077 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,921 psi | 75% | 2969 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,505 psi | 85% | 3107 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 56% | 1880 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,637 psi | 89% | 3077 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 55,143 psi | 86% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,492 psi | 87% | 3041 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,680 psi | 87% | 3012 fps | 96% |
| IMR 4198 | <<locked>> | 82% | 55,187 psi | 86% | 2933 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,955 psi | 86% | 3028 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 3035 fps | 98% |
| IMR 4895 | <<locked>> | 90% | 54,346 psi | 85% | 3084 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 57,493 psi | 90% | 3071 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 55,027 psi | 86% | 3009 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,940 psi | 86% | 3048 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,708 psi | 86% | 2986 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 55,564 psi | 87% | 3045 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 54,476 psi | 85% | 3025 fps | 97.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3064 fps | 96.3% |
| Norma 201 | <<locked>> | 90% | 57,653 psi | 90% | 3064 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,317 psi | 85% | 3018 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,666 psi | 87% | 3094 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3087 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 55,869 psi | 88% | 3114 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,735 psi | 81% | 3071 fps | 96.3% |
| Ramshot TAC | <<locked>> | 86% | 54,505 psi | 85% | 3025 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,435 psi | 90% | 3104 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,303 psi | 87% | 3015 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 57% | 1929 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,985 psi | 89% | 3051 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,607 psi | 86% | 3028 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,536 psi | 89% | 3176 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,898 psi | 88% | 3209 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3117 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,243 psi | 83% | 3133 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 86% | 55,796 psi | 87% | 3005 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,752 psi | 86% | 3012 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 56,565 psi | 89% | 3094 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,476 psi | 85% | 3025 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,940 psi | 86% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,564 psi | 87% | 3045 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3064 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,695 psi | 89% | 3018 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,696 psi | 90% | 3150 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,086 psi | 88% | 2999 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,710 psi | 89% | 3061 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,768 psi | 89% | 3084 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,448 psi | 87% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,245 psi | 87% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,984 psi | 86% | 2976 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 55,347 psi | 87% | 3051 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 55,230 psi | 87% | 2956 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,695 psi | 87% | 3048 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 56,623 psi | 89% | 3087 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,152 psi | 74% | 3031 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 55,259 psi | 87% | 2920 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,405 psi | 87% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,072 psi | 89% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,679 psi | 86% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,752 psi | 86% | 3018 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3077 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 54,549 psi | 85% | 3015 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 56,550 psi | 89% | 3041 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,447 psi | 85% | 3087 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,524 psi | 64% | 2900 fps | 96.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,057 psi | 88% | 3064 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 53,911 psi | 84% | 3061 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3146 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,550 psi | 89% | 3094 fps | 99.7% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 47,340 psi | 74% | 2835 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,822 psi | 81% | 2949 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,118 psi | 64% | 2762 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,572 psi | 73% | 2897 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 38,783 psi | 61% | 2746 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 41,379 psi | 65% | 2867 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 54,520 psi | 85% | 2907 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 43,250 psi | 68% | 2841 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 39,189 psi | 61% | 2733 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,107 psi | 71% | 2851 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,150 psi | 71% | 2861 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,257 psi | 82% | 3071 fps | 99.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,160 psi | 61% | 2848 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,825 psi | 58% | 2713 fps | 96.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,591 psi | 82% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,262 psi | 62% | 2769 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,857 psi | 64% | 2867 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,998 psi | 56% | 2772 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 35,505 psi | 56% | 2756 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,925 psi | 85% | 2900 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,322 psi | 66% | 2838 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 36,608 psi | 57% | 2717 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,992 psi | 74% | 2848 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,034 psi | 69% | 2877 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,906 psi | 75% | 3018 fps | 98% |
| Hodgdon H322 | <<locked>> | 80% | 51,242 psi | 80% | 2966 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,054 psi | 82% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 42,134 psi | 66% | 2822 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 52,765 psi | 83% | 3084 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,642 psi | 68% | 2854 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,665 psi | 56% | 2707 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,450 psi | 62% | 2818 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 42% | 1686 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,800 psi | 66% | 2802 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 42,989 psi | 67% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,827 psi | 61% | 2717 fps | 95.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,359 psi | 82% | 2953 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 52,330 psi | 82% | 2890 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,953 psi | 81% | 2976 fps | 95.1% |
| IMR 4831 | <<locked>> | 92% | 39,726 psi | 62% | 2815 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 40,103 psi | 63% | 2805 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 45,107 psi | 71% | 2851 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 51,401 psi | 81% | 2949 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 42,540 psi | 67% | 2831 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 43,497 psi | 68% | 2779 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 39,059 psi | 61% | 2733 fps | 97.8% |
| Lovex S065 | <<locked>> | 92% | 45,788 psi | 72% | 2867 fps | 95.3% |
| Lovex S070 | <<locked>> | 98% | 52,069 psi | 82% | 3005 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,960 psi | 67% | 2802 fps | 98.6% |
| Norma 202 | <<locked>> | 80% | 42,902 psi | 67% | 2818 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 38,667 psi | 61% | 2759 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 41,249 psi | 65% | 2861 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 37,927 psi | 59% | 2762 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 48,660 psi | 76% | 3012 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 45,281 psi | 71% | 2851 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,411 psi | 70% | 2871 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,733 psi | 76% | 2900 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 42% | 1722 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,488 psi | 79% | 2946 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,935 psi | 75% | 2910 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,524 psi | 64% | 2871 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,736 psi | 53% | 2726 fps | 97.4% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,785 psi | 64% | 2877 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 46,717 psi | 73% | 3005 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 47,166 psi | 74% | 2861 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 41,017 psi | 64% | 2753 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 80% | 34,621 psi | 54% | 2661 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,788 psi | 72% | 2867 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,540 psi | 67% | 2831 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 39,059 psi | 61% | 2733 fps | 97.8% |
| Shooters World SW4350 | <<locked>> | 98% | 52,069 psi | 82% | 3005 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,214 psi | 83% | 2963 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 37,202 psi | 58% | 2753 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,895 psi | 83% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,584 psi | 68% | 2822 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,727 psi | 65% | 2805 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,874 psi | 69% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,550 psi | 57% | 2615 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,605 psi | 81% | 2920 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 48,936 psi | 77% | 2940 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 43,729 psi | 69% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,120 psi | 68% | 2822 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 35,302 psi | 55% | 2664 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 31,169 psi | 49% | 2644 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,284 psi | 77% | 2828 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,918 psi | 69% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,914 psi | 63% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,524 psi | 64% | 2746 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 33,547 psi | 53% | 2598 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 90% | 40,379 psi | 63% | 2802 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,281 psi | 71% | 2851 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 39,276 psi | 62% | 2733 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 42,583 psi | 67% | 2867 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 38,189 psi | 60% | 2844 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,998 psi | 56% | 2671 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,527 psi | 70% | 2894 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 53,084 psi | 83% | 3091 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,017 psi | 64% | 2808 fps | 97.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 109 powders for .284 Win. loaded with the .284 | 120gr | Barnes X BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,209 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Alliant Reloder-26, Hodgdon H4350 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.