Load Specifications
Bullet:.284 | 145gr | Speer Hot-Cor
Bullet Manufacturer:Speer
Bullet Weight:145 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:1:13.0
Load data in caliber .284 Win. with .284 | 145gr | Speer Hot-Cor 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>> | 84% | 57,130 psi | 90% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,941 psi | 88% | 2766 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,595 psi | 90% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,940 psi | 86% | 2772 fps | 97.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,888 psi | 67% | 2667 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 56,115 psi | 88% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,115 psi | 88% | 2904 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 56,217 psi | 88% | 2848 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,058 psi | 89% | 2844 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,013 psi | 86% | 2795 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,333 psi | 88% | 2769 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,985 psi | 88% | 2969 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,479 psi | 90% | 2867 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,273 psi | 85% | 2838 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,782 psi | 89% | 2956 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,723 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,988 psi | 64% | 2700 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,847 psi | 72% | 2864 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,130 psi | 88% | 2864 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 54,404 psi | 85% | 2835 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,447 psi | 85% | 2805 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,594 psi | 89% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,476 psi | 85% | 2825 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,637 psi | 89% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,201 psi | 87% | 2844 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 54,940 psi | 86% | 2897 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 94% | 55,695 psi | 87% | 2861 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 56,782 psi | 89% | 2858 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2831 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,260 psi | 88% | 2887 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,419 psi | 87% | 2936 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 56% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,346 psi | 85% | 2805 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,797 psi | 89% | 2831 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,652 psi | 89% | 2828 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,492 psi | 89% | 2808 fps | 98.3% |
| IMR 4350 | <<locked>> | 98% | 54,839 psi | 86% | 2831 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,202 psi | 88% | 2835 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,463 psi | 88% | 2894 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 55,666 psi | 87% | 2867 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,013 psi | 86% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,217 psi | 88% | 2822 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,405 psi | 87% | 2769 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,550 psi | 89% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,811 psi | 87% | 2831 fps | 99.2% |
| Lovex S070 | <<locked>> | 98% | 56,811 psi | 89% | 2867 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 54,940 psi | 86% | 2792 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,347 psi | 87% | 2789 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,058 psi | 89% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,579 psi | 87% | 2884 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 45,614 psi | 71% | 2815 fps | 96.2% |
| Norma URP | <<locked>> | 98% | 54,868 psi | 86% | 2890 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 54,099 psi | 85% | 2851 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,435 psi | 90% | 2943 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 55,216 psi | 87% | 2815 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,100 psi | 86% | 2835 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,883 psi | 88% | 2795 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,492 psi | 87% | 2828 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,013 psi | 86% | 2907 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,505 psi | 85% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,811 psi | 87% | 2927 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,129 psi | 86% | 2956 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 55,941 psi | 88% | 2772 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,564 psi | 87% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,288 psi | 85% | 2825 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,447 psi | 85% | 2805 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,811 psi | 87% | 2831 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,217 psi | 88% | 2822 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,550 psi | 89% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,811 psi | 89% | 2867 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,202 psi | 88% | 2890 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,566 psi | 90% | 2851 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,665 psi | 86% | 2818 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,333 psi | 88% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,565 psi | 89% | 2726 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,057 psi | 88% | 2782 fps | 98.2% |
| Somchem S321 | <<locked>> | 82% | 56,434 psi | 88% | 2828 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,738 psi | 87% | 2726 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,246 psi | 90% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,621 psi | 86% | 2825 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 2890 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2776 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 82% | 56,028 psi | 88% | 2687 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,594 psi | 89% | 2710 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,303 psi | 87% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,869 psi | 88% | 2766 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,130 psi | 88% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,537 psi | 90% | 2887 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,521 psi | 87% | 2795 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,522 psi | 90% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,391 psi | 88% | 2890 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,136 psi | 71% | 2776 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,595 psi | 90% | 2861 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,651 psi | 87% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,245 psi | 87% | 2904 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,738 psi | 58% | 2713 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,563 psi | 86% | 2828 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,343 psi | 79% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,352 psi | 68% | 2582 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,415 psi | 79% | 2733 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,976 psi | 70% | 2605 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 37,434 psi | 59% | 2559 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 41,002 psi | 64% | 2579 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,140 psi | 50% | 2454 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 46,572 psi | 73% | 2690 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 39,479 psi | 62% | 2539 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,617 psi | 76% | 2697 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,284 psi | 77% | 2677 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,525 psi | 67% | 2730 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,363 psi | 62% | 2566 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,206 psi | 66% | 2628 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,503 psi | 51% | 2467 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,084 psi | 53% | 2539 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,095 psi | 47% | 2434 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,548 psi | 54% | 2605 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,759 psi | 72% | 2694 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 38,986 psi | 61% | 2566 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 45,310 psi | 71% | 2648 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,125 psi | 79% | 2680 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,805 psi | 75% | 2723 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,707 psi | 83% | 2867 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 80% | 39,842 psi | 62% | 2572 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 42,322 psi | 66% | 2677 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 90% | 48,907 psi | 77% | 2749 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 47,007 psi | 74% | 2703 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,050 psi | 44% | 2316 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,105 psi | 68% | 2674 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 44,846 psi | 70% | 2749 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 42% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,904 psi | 70% | 2651 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 46,717 psi | 73% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,466 psi | 65% | 2572 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,976 psi | 69% | 2595 fps | 95.8% |
| IMR 4350 | <<locked>> | 92% | 45,426 psi | 71% | 2674 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,524 psi | 65% | 2575 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 33,417 psi | 52% | 2467 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 43,265 psi | 68% | 2657 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 48,617 psi | 76% | 2697 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,977 psi | 72% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,238 psi | 72% | 2621 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 41,466 psi | 65% | 2579 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 36,332 psi | 57% | 2470 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 41,524 psi | 65% | 2602 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 45,658 psi | 72% | 2644 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 45,948 psi | 72% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,597 psi | 65% | 2618 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 51,895 psi | 81% | 2825 fps | 95.8% |
| Norma MRP | <<locked>> | 98% | 42,670 psi | 67% | 2756 fps | 95.2% |
| Norma URP | <<locked>> | 82% | 32,634 psi | 51% | 2461 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,292 psi | 65% | 2631 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 38,740 psi | 61% | 2608 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 48,457 psi | 76% | 2703 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,138 psi | 75% | 2726 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,170 psi | 82% | 2743 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 42% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,205 psi | 63% | 2556 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,730 psi | 70% | 2736 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,274 psi | 57% | 2605 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,142 psi | 54% | 2526 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,695 psi | 57% | 2592 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 49,748 psi | 78% | 2680 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,497 psi | 68% | 2595 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,782 psi | 58% | 2516 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 45,310 psi | 71% | 2648 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,332 psi | 57% | 2470 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,977 psi | 72% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,466 psi | 65% | 2579 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 41,524 psi | 65% | 2602 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,797 psi | 59% | 2566 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,978 psi | 74% | 2680 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,078 psi | 71% | 2661 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,891 psi | 73% | 2592 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,160 psi | 61% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,163 psi | 68% | 2569 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 52,634 psi | 82% | 2772 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,557 psi | 73% | 2592 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,572 psi | 73% | 2677 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 37,637 psi | 59% | 2523 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 27,267 psi | 43% | 2352 fps | 96.4% |
| Somchem S385 | <<locked>> | 98% | 45,934 psi | 72% | 2720 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 52,794 psi | 83% | 2644 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,268 psi | 74% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,091 psi | 68% | 2572 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,482 psi | 68% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,694 psi | 56% | 2454 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 33,910 psi | 53% | 2461 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 48,602 psi | 76% | 2690 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,916 psi | 66% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,489 psi | 52% | 2461 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 30,342 psi | 48% | 2451 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,575 psi | 49% | 2382 fps | 96.9% |
| Winchester 748 | <<locked>> | 80% | 48,704 psi | 76% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,322 psi | 66% | 2677 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,369 psi | 44% | 2451 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,570 psi | 70% | 2664 fps | 99.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 98 powders for .284 Win. loaded with the .284 | 145gr | Speer Hot-Cor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,969 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,969 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 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 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.