Load Specifications
Bullet Manufacturer:Cutting Edge
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:1:15.0
Load data in caliber .338 Weatherby RPM with .338 | 200gr | CutEdge ESP Raptor 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 Ramshot Big Game.
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% | 56,565 psi | 87% | 2710 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,058 psi | 88% | 2812 fps | 99.3% |
| Accurate 2230 | <<locked>> | 82% | 58,262 psi | 90% | 2828 fps | 99.6% |
| Accurate 2460 | <<locked>> | 86% | 55,274 psi | 85% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 57,348 psi | 88% | 2769 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,869 psi | 87% | 2799 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 57,058 psi | 88% | 2812 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,905 psi | 71% | 2713 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 84% | 56,739 psi | 87% | 2664 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 57,174 psi | 88% | 2687 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,898 psi | 86% | 2805 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 82% | 58,204 psi | 90% | 2674 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 56,797 psi | 87% | 2795 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 57,653 psi | 89% | 2785 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 58,784 psi | 90% | 2812 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 58,668 psi | 90% | 2785 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,826 psi | 87% | 2867 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,288 psi | 85% | 2910 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,927 psi | 86% | 2818 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,521 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 57,058 psi | 88% | 2841 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,948 psi | 71% | 2726 fps | 97.6% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,040 psi | 82% | 2877 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,767 psi | 86% | 2661 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,680 psi | 86% | 2818 fps | 99% |
| Bofors RP3 | <<locked>> | 98% | 56,246 psi | 87% | 2831 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 57,406 psi | 88% | 2749 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 57,812 psi | 89% | 2841 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 55,869 psi | 86% | 2881 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 86% | 55,956 psi | 86% | 2762 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 57,188 psi | 88% | 2789 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 58,073 psi | 89% | 2844 fps | 98.8% |
| Hodgdon H4198 | <<locked>> | 82% | 58,653 psi | 90% | 2710 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 56,391 psi | 87% | 2815 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,814 psi | 64% | 2608 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,129 psi | 85% | 2844 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 53% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 58,059 psi | 89% | 2818 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 55,753 psi | 86% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,188 psi | 86% | 2782 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 57,232 psi | 88% | 2766 fps | 96.7% |
| IMR 4198 | <<locked>> | 86% | 57,072 psi | 88% | 2680 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,101 psi | 86% | 2779 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,772 psi | 67% | 2657 fps | 97% |
| IMR 4895 | <<locked>> | 96% | 58,465 psi | 90% | 2874 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 92% | 58,784 psi | 90% | 2812 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 54,984 psi | 85% | 2746 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 58,624 psi | 90% | 2828 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,912 psi | 86% | 2733 fps | 99.6% |
| Lovex S062 | <<locked>> | 96% | 55,593 psi | 86% | 2779 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,111 psi | 79% | 2713 fps | 97% |
| Norma 200 | <<locked>> | 82% | 56,188 psi | 86% | 2690 fps | 100% |
| Norma 201 | <<locked>> | 94% | 57,711 psi | 89% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 94% | 58,537 psi | 90% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,072 psi | 86% | 2828 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 46,050 psi | 71% | 2713 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 96% | 56,681 psi | 87% | 2854 fps | 99.6% |
| Ramshot TAC | <<locked>> | 90% | 55,680 psi | 86% | 2772 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 92% | 58,798 psi | 90% | 2851 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,492 psi | 87% | 2766 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,838 psi | 54% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 58,610 psi | 90% | 2799 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,230 psi | 85% | 2776 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 57,377 psi | 88% | 2910 fps | 99.5% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 56,739 psi | 87% | 2940 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,803 psi | 70% | 2736 fps | 97.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,036 psi | 72% | 2756 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 92% | 58,610 psi | 90% | 2779 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 58,073 psi | 89% | 2792 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,144 psi | 86% | 2818 fps | 99.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,111 psi | 79% | 2713 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 94% | 58,624 psi | 90% | 2828 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 55,593 psi | 86% | 2779 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 58,668 psi | 90% | 2772 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,623 psi | 87% | 2415 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 57,769 psi | 89% | 2792 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 58,450 psi | 90% | 2887 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 57,638 psi | 89% | 2743 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 57,493 psi | 88% | 2805 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 57,986 psi | 89% | 2828 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,637 psi | 87% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,318 psi | 87% | 2694 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 56,420 psi | 87% | 2795 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 55,637 psi | 86% | 2697 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 56,942 psi | 88% | 2799 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 56,492 psi | 87% | 2815 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,785 psi | 63% | 2657 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 82% | 58,015 psi | 89% | 2625 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 56,565 psi | 87% | 2671 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,637 psi | 87% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 57,435 psi | 88% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,434 psi | 85% | 2736 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,969 psi | 85% | 2756 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,646 psi | 75% | 2717 fps | 97.7% |
| Vihtavuori N530 | <<locked>> | 90% | 55,782 psi | 86% | 2762 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 57,043 psi | 88% | 2779 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,543 psi | 73% | 2717 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,777 psi | 77% | 2703 fps | 99.4% |
| Winchester 748 | <<locked>> | 90% | 55,042 psi | 85% | 2808 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 57,725 psi | 89% | 2838 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% | 41,263 psi | 63% | 2487 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,417 psi | 82% | 2759 fps | 98.9% |
| Accurate 2230 | <<locked>> | 80% | 54,230 psi | 83% | 2769 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 44,976 psi | 69% | 2589 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,475 psi | 51% | 2392 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,132 psi | 62% | 2536 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 31,676 psi | 49% | 2372 fps | 98.7% |
| Accurate 4350 | <<locked>> | 96% | 39,711 psi | 61% | 2602 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 50,183 psi | 77% | 2575 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,575 psi | 78% | 2598 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,058 psi | 59% | 2490 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 80% | 54,766 psi | 84% | 2635 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 36,811 psi | 57% | 2448 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 50,227 psi | 77% | 2684 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,103 psi | 62% | 2510 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 39,146 psi | 60% | 2513 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,499 psi | 72% | 2700 fps | 99% |
| Alliant Power Pro 2000-MR | 58 gr | 84% | 39,218 psi | 60% | 2608 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,241 psi | 48% | 2356 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,079 psi | 72% | 2589 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,245 psi | 56% | 2474 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,145 psi | 59% | 2562 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,083 psi | 51% | 2470 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,979 psi | 75% | 2569 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,927 psi | 57% | 2484 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 30,385 psi | 47% | 2349 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,206 psi | 65% | 2507 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,189 psi | 59% | 2520 fps | 98.5% |
| Hodgdon CFE223 | 56.6 gr | 80% | 42,105 psi | 65% | 2648 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 80% | 45,818 psi | 70% | 2615 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,470 psi | 71% | 2635 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 41,539 psi | 64% | 2572 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 55,274 psi | 85% | 2664 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 38,319 psi | 59% | 2503 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,445 psi | 50% | 2402 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,243 psi | 53% | 2461 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,599 psi | 39% | 1483 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,956 psi | 57% | 2457 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 37,188 psi | 57% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,143 psi | 56% | 2428 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,241 psi | 77% | 2657 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 47,732 psi | 73% | 2556 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,472 psi | 76% | 2674 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 38,450 psi | 59% | 2556 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,708 psi | 53% | 2448 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 40,103 psi | 62% | 2510 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 44,802 psi | 69% | 2592 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 36,303 psi | 56% | 2470 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 38,870 psi | 60% | 2444 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 33,518 psi | 52% | 2382 fps | 96.7% |
| Lovex S065 | <<locked>> | 96% | 45,179 psi | 70% | 2615 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 52,924 psi | 81% | 2648 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,202 psi | 57% | 2451 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 37,231 psi | 57% | 2464 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 33,315 psi | 51% | 2408 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 40,364 psi | 62% | 2605 fps | 95.8% |
| Ramshot Big Game | 56.7 gr | 82% | 35,186 psi | 54% | 2470 fps | 95.4% |
| Ramshot TAC | <<locked>> | 82% | 42,685 psi | 66% | 2556 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,001 psi | 60% | 2520 fps | 96.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,526 psi | 67% | 2556 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 40% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,092 psi | 69% | 2595 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,428 psi | 75% | 2667 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 37,478 psi | 58% | 2562 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,877 psi | 44% | 2362 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 39,697 psi | 61% | 2618 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 43,816 psi | 67% | 2694 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 40,727 psi | 63% | 2500 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 35,230 psi | 54% | 2402 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 32,779 psi | 50% | 2405 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 45,179 psi | 70% | 2615 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,303 psi | 56% | 2470 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 33,518 psi | 52% | 2382 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,790 psi | 74% | 2615 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,925 psi | 83% | 2382 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,401 psi | 78% | 2690 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,389 psi | 53% | 2457 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,950 psi | 74% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 40,640 psi | 63% | 2526 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,666 psi | 56% | 2461 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,015 psi | 60% | 2425 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,952 psi | 49% | 2290 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 42,917 psi | 66% | 2582 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 38,435 psi | 59% | 2428 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,565 psi | 58% | 2470 fps | 96.4% |
| Somchem S355 | <<locked>> | 82% | 31,792 psi | 49% | 2362 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 29,530 psi | 45% | 2385 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 54,650 psi | 84% | 2582 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 44,338 psi | 68% | 2497 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,204 psi | 60% | 2428 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,345 psi | 53% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,215 psi | 54% | 2402 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 28,210 psi | 43% | 2254 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 94% | 39,871 psi | 61% | 2556 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 39,871 psi | 61% | 2500 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 33,808 psi | 52% | 2388 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 94% | 38,885 psi | 60% | 2556 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 33,243 psi | 51% | 2382 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 38,957 psi | 60% | 2543 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,694 psi | 55% | 2461 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 100 powders for .338 Weatherby RPM loaded with the .338 | 200gr | CutEdge ESP Raptor. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,940 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,940 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 1:15.0 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, Ramshot Big Game rank at the top here: for .338 Weatherby RPM with the .338 | 200gr | CutEdge ESP Raptor 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.