Load Specifications
Load data in caliber .338 Weatherby RPM with .338 | 200gr | Nosler Ballistic Silver Tip bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon CFE223 and ReloadSwiss RS 52.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 57,058 psi | 88% | 2703 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,174 psi | 88% | 2802 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 58,711 psi | 90% | 2818 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 55,666 psi | 86% | 2733 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 58,146 psi | 89% | 2766 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 57,537 psi | 89% | 2795 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 57,798 psi | 89% | 2808 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,224 psi | 71% | 2707 fps | 97.3% |
| Accurate LT-30 | <<locked>> | 84% | 56,739 psi | 87% | 2651 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 57,217 psi | 88% | 2677 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,101 psi | 86% | 2795 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 82% | 58,552 psi | 90% | 2667 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 56,985 psi | 88% | 2789 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 57,885 psi | 89% | 2776 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,332 psi | 85% | 2753 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 55,361 psi | 85% | 2736 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 57,130 psi | 88% | 2858 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,579 psi | 86% | 2904 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,188 psi | 86% | 2808 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 57,072 psi | 88% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 57,290 psi | 88% | 2831 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,282 psi | 71% | 2717 fps | 97.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,243 psi | 82% | 2867 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,028 psi | 86% | 2654 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,941 psi | 86% | 2808 fps | 99% |
| Bofors RP3 | <<locked>> | 98% | 56,753 psi | 87% | 2825 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 57,711 psi | 89% | 2740 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 57,928 psi | 89% | 2831 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,014 psi | 86% | 2871 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 86% | 56,159 psi | 86% | 2753 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 57,290 psi | 88% | 2779 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 58,436 psi | 90% | 2835 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 92% | 56,579 psi | 87% | 2805 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,221 psi | 65% | 2602 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,376 psi | 85% | 2835 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,708 psi | 53% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 58,131 psi | 89% | 2808 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 55,782 psi | 86% | 2792 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,608 psi | 87% | 2776 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 57,450 psi | 88% | 2753 fps | 96.6% |
| IMR 4198 | <<locked>> | 86% | 57,217 psi | 88% | 2671 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,376 psi | 87% | 2769 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,208 psi | 68% | 2654 fps | 97% |
| IMR 4895 | <<locked>> | 96% | 58,769 psi | 90% | 2864 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 90% | 55,332 psi | 85% | 2753 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 55,753 psi | 86% | 2743 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,259 psi | 85% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,260 psi | 87% | 2726 fps | 99.6% |
| Lovex S062 | <<locked>> | 96% | 55,898 psi | 86% | 2772 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,561 psi | 79% | 2707 fps | 96.9% |
| Norma 200 | <<locked>> | 82% | 56,956 psi | 88% | 2687 fps | 100% |
| Norma 201 | <<locked>> | 94% | 58,363 psi | 90% | 2792 fps | 100% |
| Norma 202 | <<locked>> | 94% | 58,668 psi | 90% | 2795 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,376 psi | 87% | 2818 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 46,224 psi | 71% | 2703 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 96% | 57,014 psi | 88% | 2848 fps | 99.6% |
| Ramshot TAC | <<locked>> | 90% | 55,985 psi | 86% | 2766 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 92% | 58,784 psi | 90% | 2835 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,724 psi | 87% | 2756 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,983 psi | 54% | 1693 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,303 psi | 85% | 2743 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,347 psi | 85% | 2762 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 57,188 psi | 88% | 2894 fps | 99.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,840 psi | 87% | 2927 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,151 psi | 71% | 2730 fps | 97% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,282 psi | 73% | 2746 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 90% | 55,999 psi | 86% | 2733 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 58,682 psi | 90% | 2785 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,362 psi | 87% | 2812 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,561 psi | 79% | 2707 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,259 psi | 85% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 55,898 psi | 86% | 2772 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,071 psi | 85% | 2710 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,913 psi | 88% | 2408 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 58,102 psi | 89% | 2785 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 58,450 psi | 90% | 2874 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 58,044 psi | 89% | 2733 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 57,899 psi | 89% | 2795 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 57,972 psi | 89% | 2815 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,971 psi | 88% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,449 psi | 87% | 2684 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 56,739 psi | 87% | 2789 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 55,898 psi | 86% | 2687 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 57,261 psi | 88% | 2789 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 56,869 psi | 87% | 2808 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,263 psi | 63% | 2654 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 82% | 58,334 psi | 90% | 2615 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 56,811 psi | 87% | 2661 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,840 psi | 87% | 2677 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 57,595 psi | 89% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,593 psi | 86% | 2726 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,056 psi | 85% | 2746 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,747 psi | 75% | 2703 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 90% | 56,173 psi | 86% | 2756 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 57,377 psi | 88% | 2772 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,790 psi | 74% | 2710 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,096 psi | 77% | 2697 fps | 99.4% |
| Winchester 748 | <<locked>> | 90% | 55,187 psi | 85% | 2799 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 57,682 psi | 89% | 2825 fps | 99.9% |
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% | 41,945 psi | 65% | 2484 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,563 psi | 82% | 2746 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 54,679 psi | 84% | 2762 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 45,629 psi | 70% | 2585 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,418 psi | 53% | 2395 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,770 psi | 63% | 2536 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 32,576 psi | 50% | 2379 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 40,306 psi | 62% | 2602 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 50,459 psi | 78% | 2566 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,850 psi | 78% | 2589 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,624 psi | 59% | 2490 fps | 96.7% |
| ADI AR 2207 | <<locked>> | 80% | 55,129 psi | 85% | 2625 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 37,130 psi | 57% | 2441 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 50,459 psi | 78% | 2674 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,654 psi | 63% | 2507 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 39,639 psi | 61% | 2510 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,050 psi | 72% | 2697 fps | 99% |
| Alliant Power Pro 2000-MR | 57.1 gr | 84% | 39,668 psi | 61% | 2605 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,865 psi | 49% | 2359 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,572 psi | 73% | 2582 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,709 psi | 56% | 2470 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,450 psi | 59% | 2556 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,634 psi | 52% | 2470 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,226 psi | 76% | 2559 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,972 psi | 61% | 2536 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 31,140 psi | 48% | 2356 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,670 psi | 66% | 2503 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,711 psi | 60% | 2516 fps | 98.5% |
| Hodgdon CFE223 | 55.7 gr | 80% | 42,482 psi | 65% | 2644 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 46,238 psi | 71% | 2608 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,036 psi | 72% | 2631 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,163 psi | 65% | 2572 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 38,928 psi | 60% | 2503 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,025 psi | 51% | 2402 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,693 psi | 53% | 2461 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,773 psi | 40% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,405 psi | 58% | 2454 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 37,724 psi | 58% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,651 psi | 56% | 2425 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,676 psi | 78% | 2651 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 48,124 psi | 74% | 2549 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,953 psi | 81% | 2717 fps | 95.6% |
| IMR 4831 | <<locked>> | 96% | 38,899 psi | 60% | 2552 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,346 psi | 54% | 2451 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,654 psi | 63% | 2507 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 45,455 psi | 70% | 2589 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 36,912 psi | 57% | 2470 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 39,363 psi | 61% | 2441 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 34,200 psi | 53% | 2385 fps | 96.8% |
| Lovex S065 | <<locked>> | 96% | 45,614 psi | 70% | 2608 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 53,403 psi | 82% | 2641 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,753 psi | 58% | 2448 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 37,797 psi | 58% | 2464 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 33,953 psi | 52% | 2408 fps | 95.2% |
| Norma URP | <<locked>> | 96% | 40,756 psi | 63% | 2598 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 82% | 35,520 psi | 55% | 2464 fps | 95.4% |
| Ramshot TAC | <<locked>> | 82% | 43,134 psi | 66% | 2549 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,624 psi | 61% | 2520 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,918 psi | 68% | 2549 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,933 psi | 40% | 1512 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,614 psi | 70% | 2592 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,776 psi | 75% | 2661 fps | 95.5% |
| ReloadSwiss RS 52 | 54 gr | 82% | 37,913 psi | 58% | 2559 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,559 psi | 45% | 2369 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,234 psi | 62% | 2615 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,150 psi | 68% | 2684 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 41,597 psi | 64% | 2503 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 35,940 psi | 55% | 2402 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 31,401 psi | 48% | 2356 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 96% | 45,614 psi | 70% | 2608 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,912 psi | 57% | 2470 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 34,200 psi | 53% | 2385 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,167 psi | 74% | 2605 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,201 psi | 83% | 2375 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,995 psi | 78% | 2687 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,838 psi | 54% | 2454 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,298 psi | 74% | 2598 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,017 psi | 63% | 2520 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,057 psi | 57% | 2454 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,537 psi | 61% | 2421 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,460 psi | 50% | 2290 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 43,395 psi | 67% | 2579 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 38,870 psi | 60% | 2421 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,985 psi | 58% | 2467 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 32,503 psi | 50% | 2365 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 30,008 psi | 46% | 2385 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 54,940 psi | 85% | 2575 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 44,788 psi | 69% | 2493 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,639 psi | 61% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,940 psi | 54% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,766 psi | 55% | 2402 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 28,863 psi | 44% | 2257 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 40,263 psi | 62% | 2549 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 40,437 psi | 62% | 2500 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,447 psi | 53% | 2388 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 39,334 psi | 61% | 2552 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,663 psi | 52% | 2379 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 39,305 psi | 60% | 2536 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,172 psi | 56% | 2457 fps | 96.6% |
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 99 powders for .338 Weatherby RPM loaded with the .338 | 200gr | Nosler Ballistic Silver Tip. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,927 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .338 Weatherby RPM with the .338 | 200gr | Nosler Ballistic Silver Tip 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.