Load Specifications
Bullet:.284 | 140gr | Speer TBBC
Bullet Manufacturer:Speer
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:1:12.0
Load data in caliber .284 Win. with .284 | 140gr | Speer TBBC bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 54,897 psi | 86% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,101 psi | 89% | 2835 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,305 psi | 90% | 2828 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,550 psi | 87% | 2848 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,550 psi | 89% | 2831 fps | 97.1% |
| Accurate 4064 | <<locked>> | 92% | 57,130 psi | 90% | 2874 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 2966 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 57,711 psi | 90% | 2910 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,984 psi | 86% | 2854 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,536 psi | 89% | 2858 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,377 psi | 90% | 2831 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 57,421 psi | 90% | 3031 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,216 psi | 87% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,651 psi | 87% | 2900 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2963 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,782 psi | 87% | 3002 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2694 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,526 psi | 68% | 2851 fps | 97.8% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 57,624 psi | 90% | 2927 fps | 99.8% |
| Bofors RP3 | <<locked>> | 92% | 55,796 psi | 87% | 2897 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,724 psi | 87% | 2861 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,911 psi | 86% | 2792 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,159 psi | 88% | 2890 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,288 psi | 85% | 2933 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 82% | 57,363 psi | 90% | 2851 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 56,681 psi | 89% | 2907 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 98% | 56,391 psi | 88% | 2959 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 96% | 56,869 psi | 89% | 2920 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 86% | 54,621 psi | 86% | 2867 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,633 psi | 79% | 2835 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 57,667 psi | 90% | 2953 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,159 psi | 90% | 2995 fps | 97.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 56% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,854 psi | 88% | 2871 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,636 psi | 86% | 2851 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,534 psi | 85% | 2838 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,607 psi | 86% | 2818 fps | 97.6% |
| IMR 4198 | <<locked>> | 82% | 57,551 psi | 90% | 2756 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2887 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,273 psi | 85% | 2841 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,766 psi | 84% | 2897 fps | 99.5% |
| IMR 4895 | <<locked>> | 90% | 57,072 psi | 89% | 2933 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,536 psi | 89% | 2858 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,724 psi | 89% | 2841 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,638 psi | 90% | 2887 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,029 psi | 89% | 2835 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 57,667 psi | 90% | 2884 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,058 psi | 89% | 2887 fps | 99% |
| Lovex S070 | <<locked>> | 98% | 54,360 psi | 85% | 2867 fps | 97.8% |
| Norma 201 | <<locked>> | 88% | 56,072 psi | 88% | 2851 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,826 psi | 89% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,810 psi | 86% | 2887 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 2940 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 55,927 psi | 88% | 2946 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,492 psi | 87% | 2913 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2943 fps | 98.5% |
| Ramshot TAC | <<locked>> | 86% | 56,782 psi | 89% | 2877 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,565 psi | 89% | 2897 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 57,392 psi | 90% | 2861 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 57% | 1791 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,811 psi | 87% | 2835 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,043 psi | 89% | 2890 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,318 psi | 88% | 2969 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 55,564 psi | 87% | 2999 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 2986 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3015 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 86% | 57,058 psi | 89% | 2831 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,710 psi | 89% | 2851 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,651 psi | 87% | 2887 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,724 psi | 87% | 2861 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,058 psi | 89% | 2887 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,638 psi | 90% | 2887 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,667 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,360 psi | 85% | 2867 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,261 psi | 90% | 2946 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,347 psi | 87% | 2858 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,086 psi | 88% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,711 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,447 psi | 85% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 57,493 psi | 90% | 2841 fps | 98% |
| Somchem S321 | <<locked>> | 82% | 54,288 psi | 85% | 2841 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,971 psi | 89% | 2785 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,737 psi | 86% | 2844 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 55,709 psi | 87% | 2881 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2897 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,638 psi | 90% | 2753 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,505 psi | 85% | 2726 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,347 psi | 88% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,363 psi | 90% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 57,377 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,911 psi | 86% | 2890 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 86% | 57,116 psi | 90% | 2858 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,376 psi | 87% | 2828 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2949 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,583 psi | 67% | 2769 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,216 psi | 87% | 2867 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 57,058 psi | 89% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,391 psi | 88% | 2959 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,969 psi | 55% | 2690 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,985 psi | 88% | 2890 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% | 48,559 psi | 76% | 2664 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,461 psi | 84% | 2782 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,249 psi | 65% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,240 psi | 76% | 2740 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,617 psi | 78% | 2720 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 39,030 psi | 61% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,128 psi | 55% | 2562 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 44,672 psi | 70% | 2694 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,058 psi | 60% | 2546 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,702 psi | 73% | 2703 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 47,282 psi | 74% | 2694 fps | 100% |
| Alliant Power Pro 2000-MR | 44.8 gr | 80% | 40,741 psi | 64% | 2726 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,826 psi | 59% | 2572 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,408 psi | 63% | 2631 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,302 psi | 55% | 2575 fps | 95.7% |
| Alliant Reloder-17 | 44.1 gr | 80% | 32,561 psi | 51% | 2533 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,516 psi | 48% | 2474 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,710 psi | 59% | 2720 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,874 psi | 69% | 2697 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 37,347 psi | 59% | 2572 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 46,238 psi | 72% | 2700 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,544 psi | 76% | 2694 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,759 psi | 72% | 2730 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,372 psi | 79% | 2871 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 80% | 53,606 psi | 84% | 2802 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,305 psi | 60% | 2575 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 42,989 psi | 67% | 2726 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 92% | 50,169 psi | 79% | 2808 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,078 psi | 71% | 2707 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,458 psi | 48% | 2421 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,147 psi | 64% | 2677 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 46,035 psi | 72% | 2805 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 42% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,352 psi | 68% | 2661 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 44,831 psi | 70% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,958 psi | 63% | 2579 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,179 psi | 71% | 2654 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 54,476 psi | 85% | 2717 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 46,325 psi | 73% | 2726 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,223 psi | 71% | 2684 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 34,011 psi | 53% | 2520 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,379 psi | 65% | 2661 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 46,702 psi | 73% | 2703 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 53,098 psi | 83% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,903 psi | 69% | 2677 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,788 psi | 70% | 2635 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 39,929 psi | 63% | 2585 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,479 psi | 62% | 2575 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 42,482 psi | 67% | 2657 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,816 psi | 69% | 2648 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 44,309 psi | 69% | 2661 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,769 psi | 62% | 2618 fps | 98.3% |
| Norma 204 | <<locked>> | 98% | 53,098 psi | 83% | 2881 fps | 95.4% |
| Norma URP | <<locked>> | 86% | 35,433 psi | 56% | 2566 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,436 psi | 62% | 2635 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 42,032 psi | 66% | 2717 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,659 psi | 73% | 2710 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,224 psi | 72% | 2730 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,575 psi | 79% | 2756 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 42% | 1598 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,562 psi | 82% | 2789 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,162 psi | 65% | 2612 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,554 psi | 67% | 2733 fps | 98.3% |
| ReloadSwiss RS 60 | 44.1 gr | 80% | 34,635 psi | 54% | 2602 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,983 psi | 55% | 2582 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,594 psi | 59% | 2644 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 47,747 psi | 75% | 2690 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,698 psi | 65% | 2602 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,186 psi | 55% | 2516 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 46,238 psi | 72% | 2700 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,479 psi | 62% | 2575 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,903 psi | 69% | 2677 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,929 psi | 63% | 2585 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,482 psi | 67% | 2657 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,071 psi | 57% | 2566 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,049 psi | 71% | 2684 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,221 psi | 68% | 2664 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,324 psi | 71% | 2605 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,739 psi | 59% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,338 psi | 69% | 2628 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 50,575 psi | 79% | 2785 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,744 psi | 70% | 2605 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,686 psi | 70% | 2680 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 35,926 psi | 56% | 2520 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 26,107 psi | 41% | 2346 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 51,111 psi | 80% | 2664 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,658 psi | 72% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,350 psi | 65% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,872 psi | 66% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,243 psi | 54% | 2461 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 34,795 psi | 55% | 2516 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 46,949 psi | 74% | 2703 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,408 psi | 63% | 2585 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,535 psi | 57% | 2569 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 32,764 psi | 51% | 2552 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,298 psi | 47% | 2379 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 46,615 psi | 73% | 2746 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,265 psi | 68% | 2730 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,690 psi | 48% | 2556 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,670 psi | 67% | 2671 fps | 99.2% |
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 100 powders for .284 Win. loaded with the .284 | 140gr | Speer TBBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,031 fps; across all powders the maximum-charge window runs from 1,749 fps to 3,031 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .284 Win. with the .284 | 140gr | Speer TBBC 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.