Load Specifications
Bullet Manufacturer:Winchester
Bullet Weight:160 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 | 160gr | Winchester FailSafe bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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>> | 82% | 55,347 psi | 87% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,447 psi | 85% | 2598 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,579 psi | 87% | 2654 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,536 psi | 89% | 2654 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,686 psi | 70% | 2569 fps | 97.9% |
| Accurate 4064 | <<locked>> | 88% | 54,607 psi | 86% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,302 psi | 85% | 2736 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 54,360 psi | 85% | 2671 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,332 psi | 87% | 2674 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2710 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,681 psi | 89% | 2667 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,389 psi | 85% | 2592 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 57,696 psi | 90% | 2841 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,967 psi | 81% | 2710 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,637 psi | 87% | 2697 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,970 psi | 88% | 2717 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,259 psi | 87% | 2785 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,579 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,227 psi | 80% | 2703 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,337 psi | 66% | 2595 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,231 psi | 58% | 2503 fps | 96.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,572 psi | 75% | 2762 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,624 psi | 90% | 2740 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 56,217 psi | 88% | 2710 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,115 psi | 88% | 2690 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,636 psi | 86% | 2602 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,362 psi | 88% | 2700 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,000 psi | 89% | 2726 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 57,087 psi | 89% | 2785 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 94% | 57,377 psi | 90% | 2746 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 84% | 54,940 psi | 86% | 2680 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2713 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,665 psi | 86% | 2717 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 57,566 psi | 90% | 2825 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 56% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,130 psi | 88% | 2684 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,347 psi | 87% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,824 psi | 86% | 2657 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,433 psi | 85% | 2638 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 56,391 psi | 88% | 2713 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,520 psi | 85% | 2671 fps | 98.6% |
| IMR 4831 | <<locked>> | 98% | 54,781 psi | 86% | 2726 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 57,421 psi | 90% | 2743 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,681 psi | 89% | 2667 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,259 psi | 85% | 2648 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,927 psi | 89% | 2648 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,810 psi | 86% | 2654 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,348 psi | 90% | 2710 fps | 99.7% |
| Lovex S070 | <<locked>> | 96% | 55,230 psi | 87% | 2700 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,260 psi | 58% | 2431 fps | 96% |
| Norma 201 | <<locked>> | 86% | 56,652 psi | 89% | 2667 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,145 psi | 90% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,216 psi | 87% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 98% | 57,159 psi | 90% | 2766 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 47,311 psi | 74% | 2720 fps | 97.6% |
| Norma URP | <<locked>> | 98% | 56,913 psi | 89% | 2772 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 55,796 psi | 87% | 2726 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,419 psi | 87% | 2769 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 56,739 psi | 89% | 2694 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,637 psi | 89% | 2710 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,450 psi | 90% | 2674 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,564 psi | 57% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 57,305 psi | 90% | 2713 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,739 psi | 89% | 2779 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 56,144 psi | 88% | 2812 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,867 psi | 84% | 2756 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 57,058 psi | 89% | 2841 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 57,595 psi | 90% | 2641 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,000 psi | 89% | 2661 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,057 psi | 88% | 2703 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 2687 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2687 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 94% | 56,115 psi | 88% | 2690 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,348 psi | 90% | 2710 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,259 psi | 85% | 2648 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,810 psi | 86% | 2654 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,230 psi | 87% | 2700 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,186 psi | 85% | 2713 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,492 psi | 87% | 2677 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,101 psi | 88% | 2694 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,696 psi | 90% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,940 psi | 86% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,740 psi | 90% | 2671 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,545 psi | 78% | 2680 fps | 96.6% |
| Somchem S335 | <<locked>> | 86% | 57,392 psi | 90% | 2598 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,955 psi | 86% | 2664 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,246 psi | 88% | 2700 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 2769 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 2667 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 82% | 57,435 psi | 90% | 2556 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 54,868 psi | 86% | 2543 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,087 psi | 89% | 2625 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,508 psi | 90% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,114 psi | 85% | 2631 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,709 psi | 87% | 2717 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 57,348 psi | 90% | 2671 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,796 psi | 87% | 2641 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,476 psi | 85% | 2720 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,949 psi | 74% | 2667 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,637 psi | 87% | 2694 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 57,522 psi | 90% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 57,087 psi | 89% | 2785 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,043 psi | 60% | 2625 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,231 psi | 88% | 2703 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% | 51,953 psi | 81% | 2523 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,831 psi | 70% | 2464 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,214 psi | 82% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,453 psi | 68% | 2448 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 36,550 psi | 57% | 2418 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 42,424 psi | 66% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,459 psi | 49% | 2316 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,066 psi | 75% | 2575 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 40,872 psi | 64% | 2438 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 45,963 psi | 72% | 2605 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,140 psi | 79% | 2575 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,894 psi | 80% | 2549 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,874 psi | 69% | 2618 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 45,905 psi | 72% | 2608 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,698 psi | 64% | 2457 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,685 psi | 68% | 2520 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,604 psi | 50% | 2326 fps | 95.9% |
| Alliant Reloder-17 | 42.6 gr | 80% | 35,128 psi | 55% | 2441 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,281 psi | 71% | 2598 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,615 psi | 43% | 2247 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,056 psi | 55% | 2448 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 90% | 33,649 psi | 53% | 2464 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,456 psi | 74% | 2589 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 40,524 psi | 64% | 2467 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,205 psi | 65% | 2438 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,459 psi | 81% | 2556 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,182 psi | 77% | 2602 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,075 psi | 64% | 2467 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 38,348 psi | 60% | 2464 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 44,585 psi | 70% | 2539 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,573 psi | 76% | 2585 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,008 psi | 45% | 2231 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,686 psi | 70% | 2566 fps | 100% |
| Hodgdon Superformance | 48.5 gr | 86% | 40,422 psi | 63% | 2533 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 42% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,311 psi | 73% | 2536 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,559 psi | 76% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,931 psi | 67% | 2467 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,339 psi | 71% | 2490 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 41,481 psi | 65% | 2470 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,234 psi | 63% | 2421 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 30,516 psi | 48% | 2277 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 44,759 psi | 70% | 2549 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 50,140 psi | 79% | 2575 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,500 psi | 74% | 2552 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,718 psi | 75% | 2513 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,033 psi | 67% | 2470 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,331 psi | 55% | 2326 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 37,884 psi | 59% | 2402 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 34,882 psi | 55% | 2382 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 47,050 psi | 74% | 2526 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,427 psi | 74% | 2526 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,091 psi | 68% | 2510 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 46,876 psi | 73% | 2605 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 41,408 psi | 65% | 2605 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 31,662 psi | 50% | 2313 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 42,656 psi | 67% | 2523 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 35,215 psi | 55% | 2405 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 49,763 psi | 78% | 2592 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,545 psi | 78% | 2605 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,795 psi | 84% | 2625 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 43% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,495 psi | 65% | 2454 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,412 psi | 73% | 2625 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,362 psi | 59% | 2500 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,067 psi | 49% | 2326 fps | 95.2% |
| ReloadSwiss RS 70 | 44.4 gr | 82% | 33,141 psi | 52% | 2382 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 50,952 psi | 80% | 2552 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,730 psi | 70% | 2480 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,159 psi | 60% | 2415 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 50,792 psi | 80% | 2638 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 96% | 43,932 psi | 69% | 2579 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 84% | 41,205 psi | 65% | 2438 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,331 psi | 55% | 2326 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,500 psi | 74% | 2552 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,033 psi | 67% | 2470 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 37,884 psi | 59% | 2402 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,131 psi | 61% | 2464 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,341 psi | 76% | 2569 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,427 psi | 73% | 2549 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,008 psi | 75% | 2467 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,161 psi | 63% | 2346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,291 psi | 62% | 2372 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,526 psi | 68% | 2575 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,863 psi | 75% | 2474 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,283 psi | 76% | 2566 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 38,914 psi | 61% | 2418 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 28,355 psi | 44% | 2270 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 41,843 psi | 66% | 2513 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 53,954 psi | 85% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,399 psi | 76% | 2457 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,353 psi | 70% | 2451 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,875 psi | 70% | 2464 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,941 psi | 58% | 2356 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,127 psi | 52% | 2320 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 80% | 50,241 psi | 79% | 2572 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,134 psi | 68% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,460 psi | 51% | 2316 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 29,791 psi | 47% | 2316 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,706 psi | 51% | 2297 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 50,401 psi | 79% | 2621 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,580 psi | 60% | 2470 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,918 psi | 41% | 2260 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,137 psi | 72% | 2552 fps | 100% |
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 104 powders for .284 Win. loaded with the .284 | 160gr | Winchester FailSafe. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,841 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 160.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .284 Win. with the .284 | 160gr | Winchester FailSafe 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.