Load Specifications
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 Grand Slam 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.
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>> | 84% | 56,898 psi | 89% | 2736 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,043 psi | 88% | 2766 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,740 psi | 90% | 2831 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,752 psi | 86% | 2766 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,989 psi | 67% | 2671 fps | 96.7% |
| Accurate 4064 | <<locked>> | 90% | 55,941 psi | 88% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,898 psi | 88% | 2904 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 56,043 psi | 88% | 2844 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 57,188 psi | 90% | 2848 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,839 psi | 86% | 2792 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,144 psi | 88% | 2766 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,767 psi | 87% | 2963 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 57,246 psi | 90% | 2864 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,711 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,549 psi | 85% | 2940 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,814 psi | 64% | 2697 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2861 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,956 psi | 88% | 2861 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 54,563 psi | 86% | 2835 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,288 psi | 85% | 2802 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,710 psi | 89% | 2776 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,621 psi | 86% | 2825 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,463 psi | 88% | 2923 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,347 psi | 87% | 2844 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 96% | 55,100 psi | 86% | 2900 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 94% | 55,477 psi | 87% | 2858 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 56,594 psi | 89% | 2854 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,084 psi | 83% | 2828 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,391 psi | 88% | 2890 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,608 psi | 87% | 2936 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,650 psi | 56% | 1726 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,462 psi | 85% | 2808 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,927 psi | 89% | 2835 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,449 psi | 88% | 2825 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,333 psi | 88% | 2808 fps | 98.3% |
| IMR 4350 | <<locked>> | 98% | 54,708 psi | 86% | 2828 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,333 psi | 88% | 2835 fps | 98.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2890 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 55,796 psi | 87% | 2871 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,839 psi | 86% | 2792 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,028 psi | 88% | 2818 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,564 psi | 87% | 2772 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,362 psi | 88% | 2822 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,651 psi | 87% | 2828 fps | 99.1% |
| Lovex S070 | <<locked>> | 98% | 56,623 psi | 89% | 2864 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 54,752 psi | 86% | 2789 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,477 psi | 87% | 2789 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,884 psi | 89% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,361 psi | 87% | 2877 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2818 fps | 96.2% |
| Norma URP | <<locked>> | 98% | 54,708 psi | 86% | 2887 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 53,940 psi | 85% | 2848 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2940 fps | 99.2% |
| Ramshot TAC | <<locked>> | 84% | 55,071 psi | 86% | 2812 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,897 psi | 86% | 2831 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,695 psi | 87% | 2795 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,637 psi | 87% | 2828 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,766 psi | 86% | 2904 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,317 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,579 psi | 87% | 2923 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,013 psi | 86% | 2953 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 55,724 psi | 87% | 2769 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,376 psi | 87% | 2789 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,433 psi | 85% | 2825 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 54,288 psi | 85% | 2802 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,651 psi | 87% | 2828 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,028 psi | 88% | 2818 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,362 psi | 88% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,623 psi | 89% | 2864 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 56,014 psi | 88% | 2884 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,377 psi | 90% | 2844 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,476 psi | 85% | 2815 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,115 psi | 88% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,405 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,898 psi | 88% | 2779 fps | 98.2% |
| Somchem S321 | <<locked>> | 82% | 56,260 psi | 88% | 2825 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,593 psi | 87% | 2723 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,087 psi | 89% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,462 psi | 85% | 2818 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,939 psi | 83% | 2890 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,921 psi | 77% | 2769 fps | 96.4% |
| Vihtavuori N130 | <<locked>> | 82% | 55,854 psi | 88% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,405 psi | 88% | 2707 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,071 psi | 86% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,999 psi | 88% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,956 psi | 88% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,348 psi | 90% | 2884 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,347 psi | 87% | 2792 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,667 psi | 90% | 2815 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 56,246 psi | 88% | 2887 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,962 psi | 70% | 2772 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,809 psi | 84% | 2808 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,434 psi | 87% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,100 psi | 86% | 2900 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,622 psi | 57% | 2707 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,360 psi | 85% | 2825 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,459 psi | 79% | 2648 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,163 psi | 68% | 2579 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,227 psi | 79% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 45,092 psi | 71% | 2605 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 37,304 psi | 58% | 2556 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 40,843 psi | 64% | 2575 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 32,184 psi | 50% | 2454 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 46,383 psi | 73% | 2687 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 39,552 psi | 62% | 2539 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,443 psi | 76% | 2694 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,081 psi | 77% | 2674 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,409 psi | 66% | 2726 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,218 psi | 61% | 2562 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,076 psi | 66% | 2625 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,387 psi | 51% | 2464 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,953 psi | 53% | 2536 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,994 psi | 47% | 2428 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,664 psi | 54% | 2608 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,861 psi | 72% | 2697 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 39,073 psi | 61% | 2569 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 45,165 psi | 71% | 2644 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,227 psi | 79% | 2680 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,601 psi | 75% | 2717 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,823 psi | 83% | 2867 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 39,653 psi | 62% | 2569 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 42,148 psi | 66% | 2671 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 49,023 psi | 77% | 2753 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 46,862 psi | 73% | 2697 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,934 psi | 44% | 2313 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,975 psi | 67% | 2674 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 44,730 psi | 70% | 2746 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,513 psi | 42% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,005 psi | 71% | 2651 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 46,818 psi | 73% | 2690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,553 psi | 65% | 2575 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,801 psi | 69% | 2592 fps | 95.7% |
| IMR 4350 | <<locked>> | 92% | 45,266 psi | 71% | 2671 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,179 psi | 69% | 2628 fps | 95.7% |
| IMR 4831 | <<locked>> | 84% | 33,504 psi | 53% | 2470 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,120 psi | 68% | 2654 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 48,443 psi | 76% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,803 psi | 72% | 2667 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,325 psi | 73% | 2625 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 41,553 psi | 65% | 2579 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 38,667 psi | 61% | 2523 fps | 95.8% |
| Lovex S070 | <<locked>> | 88% | 41,640 psi | 65% | 2605 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 45,513 psi | 71% | 2641 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 45,788 psi | 72% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,452 psi | 65% | 2615 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 51,764 psi | 81% | 2822 fps | 95.7% |
| Norma MRP | <<locked>> | 98% | 42,815 psi | 67% | 2759 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 32,518 psi | 51% | 2457 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,147 psi | 64% | 2631 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 38,580 psi | 60% | 2605 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 48,269 psi | 76% | 2700 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,979 psi | 75% | 2720 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,315 psi | 82% | 2743 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 42% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,045 psi | 63% | 2552 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,556 psi | 70% | 2730 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,114 psi | 57% | 2598 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,243 psi | 54% | 2526 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,550 psi | 57% | 2589 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 49,559 psi | 78% | 2677 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,352 psi | 68% | 2592 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,825 psi | 58% | 2516 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 45,165 psi | 71% | 2644 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,667 psi | 61% | 2523 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,803 psi | 72% | 2667 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,553 psi | 65% | 2579 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 41,640 psi | 65% | 2605 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,637 psi | 59% | 2562 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,789 psi | 73% | 2677 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,918 psi | 70% | 2657 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,702 psi | 73% | 2589 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,015 psi | 61% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,265 psi | 68% | 2572 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 52,750 psi | 83% | 2776 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,412 psi | 73% | 2589 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,673 psi | 73% | 2677 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 37,507 psi | 59% | 2520 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 27,340 psi | 43% | 2356 fps | 96.4% |
| Somchem S385 | <<locked>> | 98% | 46,006 psi | 72% | 2720 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 52,634 psi | 82% | 2641 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,065 psi | 74% | 2579 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,917 psi | 67% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,584 psi | 68% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,781 psi | 56% | 2457 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 33,997 psi | 53% | 2461 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 48,718 psi | 76% | 2690 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,727 psi | 65% | 2569 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,373 psi | 52% | 2457 fps | 95% |
| Vihtavuori N555 | <<locked>> | 88% | 30,385 psi | 48% | 2451 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,618 psi | 50% | 2385 fps | 96.9% |
| Winchester 748 | <<locked>> | 80% | 48,559 psi | 76% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 42,148 psi | 66% | 2671 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 28,297 psi | 44% | 2448 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,411 psi | 70% | 2661 fps | 99.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 118 powders for .284 Win. loaded with the .284 | 145gr | Speer Grand Slam. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,726 fps to 2,963 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 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, Accurate High Country, 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 High Country, ADI AR 2213, Alliant Reloder-22 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.