Load Specifications
Bullet Manufacturer:Reichenberg
Bullet Weight:200 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Weatherby RPM load data
Case Length (l3):2.55"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.6 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:14.5
Load data in caliber .338 Weatherby RPM with .338 | 200gr | Reichenberg HDB Universal 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 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.
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>> | 90% | 56,942 psi | 88% | 2720 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,450 psi | 88% | 2822 fps | 99.4% |
| Accurate 2230 | <<locked>> | 82% | 58,682 psi | 90% | 2835 fps | 99.6% |
| Accurate 2460 | <<locked>> | 86% | 55,593 psi | 86% | 2749 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 57,682 psi | 89% | 2776 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 57,464 psi | 88% | 2808 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 57,392 psi | 88% | 2818 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,209 psi | 71% | 2723 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 84% | 56,855 psi | 87% | 2671 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 57,261 psi | 88% | 2694 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,173 psi | 86% | 2812 fps | 99.7% |
| ADI AR 2207 | <<locked>> | 82% | 58,668 psi | 90% | 2684 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 57,087 psi | 88% | 2805 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 84% | 58,015 psi | 89% | 2792 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,521 psi | 85% | 2772 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 55,463 psi | 85% | 2749 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 57,232 psi | 88% | 2877 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,840 psi | 86% | 2923 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,463 psi | 87% | 2828 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,971 psi | 88% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 57,363 psi | 88% | 2848 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,151 psi | 71% | 2733 fps | 97.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,519 psi | 82% | 2887 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,999 psi | 86% | 2667 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,231 psi | 87% | 2828 fps | 99.1% |
| Bofors RP3 | <<locked>> | 98% | 56,869 psi | 87% | 2841 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 90% | 57,711 psi | 89% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 58,102 psi | 89% | 2851 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,492 psi | 87% | 2894 fps | 99.5% |
| Hodgdon H322 | <<locked>> | 86% | 56,333 psi | 87% | 2769 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 57,479 psi | 88% | 2799 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 58,581 psi | 90% | 2854 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 92% | 56,710 psi | 87% | 2825 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,279 psi | 65% | 2621 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,463 psi | 85% | 2851 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,534 psi | 53% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 58,349 psi | 90% | 2828 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 56,130 psi | 86% | 2812 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,753 psi | 87% | 2792 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 94% | 57,493 psi | 88% | 2772 fps | 96.8% |
| IMR 4198 | <<locked>> | 86% | 57,479 psi | 88% | 2690 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,333 psi | 87% | 2785 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,237 psi | 68% | 2671 fps | 97.2% |
| IMR 4895 | <<locked>> | 96% | 58,784 psi | 90% | 2881 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 55,521 psi | 85% | 2772 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 55,637 psi | 86% | 2759 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,216 psi | 85% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,507 psi | 87% | 2746 fps | 99.7% |
| Lovex S062 | <<locked>> | 96% | 55,898 psi | 86% | 2785 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,605 psi | 79% | 2723 fps | 97.2% |
| Norma 200 | <<locked>> | 82% | 56,579 psi | 87% | 2697 fps | 100% |
| Norma 201 | <<locked>> | 94% | 58,291 psi | 90% | 2808 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,201 psi | 85% | 2766 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,376 psi | 87% | 2835 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 46,340 psi | 71% | 2720 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 96% | 57,232 psi | 88% | 2864 fps | 99.7% |
| Ramshot TAC | <<locked>> | 90% | 56,217 psi | 86% | 2785 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,216 psi | 85% | 2802 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 57,014 psi | 88% | 2776 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,751 psi | 53% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,303 psi | 85% | 2759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,463 psi | 85% | 2782 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 57,696 psi | 89% | 2917 fps | 99.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 57,232 psi | 88% | 2949 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,267 psi | 71% | 2746 fps | 97.2% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,413 psi | 73% | 2769 fps | 96.7% |
| Rottweil R 901 | <<locked>> | 90% | 55,666 psi | 86% | 2746 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 58,639 psi | 90% | 2802 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,391 psi | 87% | 2828 fps | 99.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,605 psi | 79% | 2723 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,216 psi | 85% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 55,898 psi | 86% | 2785 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,303 psi | 85% | 2730 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 57,101 psi | 88% | 2425 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 58,088 psi | 89% | 2802 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,042 psi | 85% | 2841 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 58,088 psi | 89% | 2749 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 58,001 psi | 89% | 2815 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 58,276 psi | 90% | 2835 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,971 psi | 88% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,652 psi | 87% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,286 psi | 80% | 2684 fps | 95.8% |
| Somchem S321 | <<locked>> | 88% | 57,000 psi | 88% | 2808 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 55,956 psi | 86% | 2703 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 57,508 psi | 88% | 2808 fps | 99.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 57,029 psi | 88% | 2828 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,220 psi | 63% | 2671 fps | 99.2% |
| Vihtavuori N120 | <<locked>> | 82% | 58,436 psi | 90% | 2631 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 56,942 psi | 88% | 2677 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,971 psi | 88% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 57,812 psi | 89% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,709 psi | 86% | 2743 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,274 psi | 85% | 2762 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,907 psi | 75% | 2723 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 90% | 56,072 psi | 86% | 2769 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 57,624 psi | 89% | 2789 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,790 psi | 74% | 2723 fps | 97.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,140 psi | 77% | 2717 fps | 99.5% |
| Winchester 748 | <<locked>> | 90% | 55,347 psi | 85% | 2815 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 58,001 psi | 89% | 2844 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% | 41,640 psi | 64% | 2497 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,824 psi | 83% | 2769 fps | 99% |
| Accurate 2230 | <<locked>> | 80% | 54,592 psi | 84% | 2779 fps | 99.3% |
| Accurate 2460 | <<locked>> | 80% | 45,339 psi | 70% | 2598 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,649 psi | 52% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,466 psi | 62% | 2546 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 31,865 psi | 49% | 2379 fps | 98.8% |
| Accurate 4350 | <<locked>> | 94% | 37,275 psi | 57% | 2556 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 50,299 psi | 77% | 2579 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,676 psi | 78% | 2602 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,348 psi | 59% | 2500 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 80% | 55,216 psi | 85% | 2644 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 37,115 psi | 57% | 2457 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 50,618 psi | 78% | 2694 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,451 psi | 62% | 2520 fps | 98.5% |
| Alliant AR-Comp | <<locked>> | 80% | 39,566 psi | 61% | 2523 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,920 psi | 72% | 2713 fps | 99.1% |
| Alliant Power Pro 2000-MR | 57.1 gr | 82% | 37,043 psi | 57% | 2562 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,560 psi | 49% | 2365 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,282 psi | 73% | 2595 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,564 psi | 56% | 2484 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,348 psi | 59% | 2572 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,301 psi | 51% | 2480 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,255 psi | 76% | 2575 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,188 psi | 57% | 2493 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 30,661 psi | 47% | 2359 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,511 psi | 65% | 2520 fps | 99.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,508 psi | 59% | 2530 fps | 98.6% |
| Hodgdon CFE223 | 57 gr | 80% | 42,409 psi | 65% | 2661 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 46,166 psi | 71% | 2625 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,833 psi | 72% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 39,146 psi | 60% | 2530 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 38,653 psi | 59% | 2513 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,677 psi | 50% | 2411 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,534 psi | 53% | 2474 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 39% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,231 psi | 57% | 2470 fps | 97% |
| IMR 3031 | <<locked>> | 80% | 37,594 psi | 58% | 2520 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,448 psi | 56% | 2438 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,778 psi | 78% | 2671 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 48,167 psi | 74% | 2562 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,966 psi | 77% | 2687 fps | 95.2% |
| IMR 4831 | <<locked>> | 96% | 38,725 psi | 60% | 2566 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 35,041 psi | 54% | 2461 fps | 95.9% |
| IMR 8208 XBR | <<locked>> | 80% | 40,451 psi | 62% | 2520 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 80% | 45,136 psi | 69% | 2602 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 36,651 psi | 56% | 2480 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 39,001 psi | 60% | 2451 fps | 97% |
| Lovex S062 | <<locked>> | 80% | 33,649 psi | 52% | 2388 fps | 96.8% |
| Lovex S065 | <<locked>> | 94% | 42,873 psi | 66% | 2572 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 53,098 psi | 82% | 2654 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,347 psi | 57% | 2457 fps | 97.9% |
| Norma 202 | <<locked>> | 80% | 37,550 psi | 58% | 2474 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 33,591 psi | 52% | 2418 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 38,029 psi | 59% | 2559 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 82% | 35,462 psi | 55% | 2480 fps | 95.6% |
| Ramshot TAC | <<locked>> | 82% | 43,149 psi | 66% | 2569 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,291 psi | 60% | 2530 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,816 psi | 67% | 2566 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,860 psi | 40% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,455 psi | 70% | 2605 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,701 psi | 70% | 2625 fps | 95% |
| ReloadSwiss RS 52 | 54 gr | 80% | 35,317 psi | 54% | 2516 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,109 psi | 45% | 2375 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,118 psi | 62% | 2631 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,208 psi | 68% | 2707 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 40,886 psi | 63% | 2507 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 35,549 psi | 55% | 2411 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 30,908 psi | 48% | 2359 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,873 psi | 66% | 2572 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,651 psi | 56% | 2480 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 33,649 psi | 52% | 2388 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,124 psi | 74% | 2621 fps | 99.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,128 psi | 83% | 2388 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,734 psi | 78% | 2700 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,635 psi | 53% | 2467 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,109 psi | 74% | 2612 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 40,930 psi | 63% | 2536 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,927 psi | 57% | 2470 fps | 96.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,131 psi | 60% | 2431 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,097 psi | 49% | 2297 fps | 99.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,776 psi | 75% | 2628 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 43,221 psi | 66% | 2592 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 38,566 psi | 59% | 2431 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,855 psi | 58% | 2480 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 32,068 psi | 49% | 2372 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 29,747 psi | 46% | 2398 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 55,114 psi | 85% | 2592 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 44,498 psi | 68% | 2503 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,334 psi | 61% | 2431 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,490 psi | 53% | 2408 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,534 psi | 55% | 2411 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 28,514 psi | 44% | 2264 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 94% | 40,132 psi | 62% | 2566 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 40,190 psi | 62% | 2510 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 34,113 psi | 52% | 2398 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 39,131 psi | 60% | 2562 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,547 psi | 52% | 2392 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 39,291 psi | 60% | 2549 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,984 psi | 55% | 2467 fps | 96.7% |
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 .338 Weatherby RPM loaded with the .338 | 200gr | Reichenberg HDB Universal. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,949 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 (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 | Reichenberg HDB Universal 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.