Load Specifications
Bullet Manufacturer:Cutting Edge
Bullet Weight:225 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:1:12.5
Load data in caliber .338 Weatherby RPM with .338 | 225gr | CutEdge Maximus bullet and 108 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, ReloadSwiss RS 52 and ReloadSwiss RS 60.
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% | 58,711 psi | 90% | 2556 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 57,305 psi | 88% | 2585 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 56,014 psi | 86% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,332 psi | 85% | 2598 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,884 psi | 88% | 2575 fps | 96.7% |
| Accurate 4064 | <<locked>> | 96% | 55,796 psi | 86% | 2615 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,037 psi | 74% | 2585 fps | 98.6% |
| Accurate LT-30 | <<locked>> | 84% | 58,247 psi | 90% | 2503 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 58,740 psi | 90% | 2530 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 57,769 psi | 89% | 2654 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 58,697 psi | 90% | 2648 fps | 99.8% |
| ADI AR 2219 | <<locked>> | 82% | 55,608 psi | 86% | 2575 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,101 psi | 88% | 2608 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 57,305 psi | 88% | 2582 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,172 psi | 85% | 2657 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 57,653 psi | 89% | 2769 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 58,117 psi | 89% | 2664 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 58,624 psi | 90% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,361 psi | 85% | 2641 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,601 psi | 73% | 2592 fps | 98.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 55,288 psi | 85% | 2733 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,243 psi | 51% | 2336 fps | 96.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 57,406 psi | 88% | 2507 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 57,870 psi | 89% | 2674 fps | 99.7% |
| Bofors RP3 | <<locked>> | 98% | 58,668 psi | 90% | 2680 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2598 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,579 psi | 86% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,072 psi | 86% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 58,276 psi | 90% | 2733 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 86% | 58,059 psi | 89% | 2605 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,245 psi | 85% | 2585 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 56,420 psi | 87% | 2648 fps | 99.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,764 psi | 80% | 2635 fps | 96.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 56,565 psi | 87% | 2651 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 92% | 58,334 psi | 90% | 2661 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,613 psi | 67% | 2480 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 57,377 psi | 88% | 2694 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 52,953 psi | 81% | 2667 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 54% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,260 psi | 87% | 2618 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 57,885 psi | 89% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 58,218 psi | 90% | 2631 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,230 psi | 85% | 2569 fps | 97.3% |
| IMR 4198 | <<locked>> | 84% | 55,550 psi | 85% | 2480 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 57,769 psi | 89% | 2631 fps | 97.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,861 psi | 71% | 2533 fps | 98.3% |
| IMR 4895 | <<locked>> | 94% | 56,739 psi | 87% | 2671 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 57,101 psi | 88% | 2608 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 57,276 psi | 88% | 2598 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 57,000 psi | 88% | 2628 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 57,914 psi | 89% | 2585 fps | 100% |
| Lovex S062 | <<locked>> | 96% | 57,435 psi | 88% | 2625 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,939 psi | 81% | 2575 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 50,357 psi | 77% | 2556 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 58,160 psi | 89% | 2530 fps | 100% |
| Norma 201 | <<locked>> | 92% | 56,333 psi | 87% | 2602 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,884 psi | 88% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 96% | 57,972 psi | 89% | 2674 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 47,834 psi | 74% | 2575 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 94% | 55,216 psi | 85% | 2657 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,210 psi | 73% | 2572 fps | 96.7% |
| Ramshot TAC | <<locked>> | 90% | 57,696 psi | 89% | 2631 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 90% | 56,753 psi | 87% | 2644 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 88% | 58,450 psi | 90% | 2615 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,143 psi | 54% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,898 psi | 88% | 2595 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 57,159 psi | 88% | 2631 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,608 psi | 86% | 2703 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,158 psi | 85% | 2736 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,761 psi | 73% | 2605 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,820 psi | 75% | 2628 fps | 98% |
| Rottweil R 901 | <<locked>> | 90% | 57,014 psi | 88% | 2579 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,739 psi | 87% | 2595 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 58,204 psi | 90% | 2667 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2598 fps | 96.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,939 psi | 81% | 2575 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 57,000 psi | 88% | 2628 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 57,435 psi | 88% | 2625 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 50,357 psi | 77% | 2556 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 56,507 psi | 87% | 2569 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 58,102 psi | 89% | 2260 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,854 psi | 86% | 2589 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,739 psi | 87% | 2684 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,173 psi | 86% | 2539 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 55,724 psi | 86% | 2608 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,086 psi | 86% | 2628 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 58,421 psi | 90% | 2543 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 58,247 psi | 90% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,679 psi | 83% | 2536 fps | 97% |
| Somchem S321 | <<locked>> | 88% | 58,392 psi | 90% | 2644 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 57,479 psi | 88% | 2543 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,317 psi | 85% | 2602 fps | 99.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 58,595 psi | 90% | 2664 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,467 psi | 65% | 2530 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 88% | 58,204 psi | 90% | 2510 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 58,465 psi | 90% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,028 psi | 86% | 2562 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 57,421 psi | 88% | 2582 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,913 psi | 88% | 2605 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,604 psi | 78% | 2579 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 90% | 57,812 psi | 89% | 2612 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 55,550 psi | 85% | 2582 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,429 psi | 76% | 2582 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,404 psi | 54% | 2405 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,474 psi | 79% | 2566 fps | 99.9% |
| Winchester 748 | <<locked>> | 90% | 57,043 psi | 88% | 2654 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,764 psi | 80% | 2635 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,738 psi | 86% | 2635 fps | 100% |
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% | 42,830 psi | 66% | 2346 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,659 psi | 72% | 2444 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,998 psi | 54% | 2264 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,829 psi | 64% | 2405 fps | 99.9% |
| Accurate 2700 | <<locked>> | 90% | 49,966 psi | 77% | 2477 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 33,112 psi | 51% | 2254 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 33,663 psi | 52% | 2323 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 51,677 psi | 80% | 2421 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,127 psi | 80% | 2448 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,523 psi | 61% | 2365 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 33,562 psi | 52% | 2224 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 52,156 psi | 80% | 2533 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,640 psi | 64% | 2379 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 40,988 psi | 63% | 2372 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,443 psi | 75% | 2559 fps | 99.7% |
| Alliant Power Pro 2000-MR | 52 gr | 80% | 35,462 psi | 55% | 2369 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,750 psi | 50% | 2244 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,631 psi | 75% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,346 psi | 54% | 2300 fps | 96.3% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,867 psi | 54% | 2339 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,037 psi | 46% | 2247 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,415 psi | 48% | 2287 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,618 psi | 78% | 2421 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,464 psi | 59% | 2365 fps | 96.6% |
| Bofors RP3 | <<locked>> | 80% | 31,879 psi | 49% | 2241 fps | 96.9% |
| Bofors RP7 | <<locked>> | 96% | 48,950 psi | 75% | 2503 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,540 psi | 67% | 2372 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,595 psi | 61% | 2388 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,859 psi | 67% | 2516 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,543 psi | 73% | 2467 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,254 psi | 74% | 2490 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,768 psi | 58% | 2346 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 45,339 psi | 70% | 2533 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 98% | 53,098 psi | 82% | 2602 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 39,856 psi | 61% | 2375 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,820 psi | 46% | 2195 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,578 psi | 55% | 2339 fps | 98% |
| Hodgdon Superformance | <<locked>> | 98% | 49,371 psi | 76% | 2612 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 40% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,319 psi | 59% | 2333 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 38,899 psi | 60% | 2375 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,186 psi | 54% | 2254 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,730 psi | 70% | 2421 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 49,342 psi | 76% | 2402 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 45,237 psi | 70% | 2444 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 35,085 psi | 54% | 2336 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 36,216 psi | 56% | 2329 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 41,640 psi | 64% | 2379 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 46,427 psi | 71% | 2451 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,710 psi | 58% | 2343 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 40,074 psi | 62% | 2313 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 34,766 psi | 53% | 2260 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 39,001 psi | 60% | 2343 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 44,425 psi | 68% | 2461 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 54,621 psi | 84% | 2490 fps | 100% |
| Norma 201 | <<locked>> | 80% | 38,522 psi | 59% | 2323 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 38,827 psi | 60% | 2336 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,722 psi | 53% | 2290 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 34,650 psi | 53% | 2329 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 34,026 psi | 52% | 2293 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 96% | 41,292 psi | 64% | 2464 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 41,437 psi | 64% | 2375 fps | 95.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,553 psi | 62% | 2392 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,049 psi | 69% | 2421 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 40% | 1411 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,630 psi | 72% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,918 psi | 68% | 2431 fps | 95.6% |
| ReloadSwiss RS 52 | 50.5 gr | 80% | 36,608 psi | 56% | 2388 fps | 96.7% |
| ReloadSwiss RS 60 | 51.3 gr | 80% | 30,124 psi | 46% | 2260 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 36,245 psi | 56% | 2392 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,798 psi | 61% | 2461 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 42,177 psi | 65% | 2362 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,593 psi | 56% | 2277 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 29,863 psi | 46% | 2185 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 48,950 psi | 75% | 2503 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,001 psi | 60% | 2343 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,710 psi | 58% | 2343 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 34,766 psi | 53% | 2260 fps | 98% |
| Shooters World SW4350 | <<locked>> | 96% | 44,425 psi | 68% | 2461 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,255 psi | 76% | 2467 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 55,172 psi | 85% | 2228 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,272 psi | 80% | 2539 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,328 psi | 48% | 2238 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,559 psi | 76% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,247 psi | 60% | 2346 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,101 psi | 59% | 2336 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,292 psi | 62% | 2290 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,127 psi | 51% | 2169 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,007 psi | 72% | 2441 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 44,614 psi | 69% | 2448 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 39,726 psi | 61% | 2293 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,189 psi | 60% | 2349 fps | 97.8% |
| Somchem S355 | <<locked>> | 80% | 31,082 psi | 48% | 2198 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 26,963 psi | 41% | 2175 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 45,759 psi | 70% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,538 psi | 62% | 2287 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,766 psi | 55% | 2270 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,593 psi | 56% | 2277 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,428 psi | 45% | 2142 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 36,419 psi | 56% | 2333 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 41,452 psi | 64% | 2372 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 35,114 psi | 54% | 2264 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 35,563 psi | 55% | 2336 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 33,199 psi | 51% | 2356 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,168 psi | 46% | 2169 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 40,495 psi | 62% | 2408 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 45,339 psi | 70% | 2533 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,173 psi | 57% | 2336 fps | 98% |
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 108 powders for .338 Weatherby RPM loaded with the .338 | 225gr | CutEdge Maximus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,769 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,769 fps. Accurate 4350 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:12.5 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, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .338 Weatherby RPM with the .338 | 225gr | CutEdge Maximus 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.