Load Specifications
Bullet Manufacturer:Axe
Bullet Weight:230 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:1:11.5
Load data in caliber .338 Weatherby RPM with .338 | 230gr | Axe Copper Spitzer 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 Hodgdon LEVERevolution.
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% | 58,175 psi | 89% | 2490 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 58,102 psi | 89% | 2585 fps | 99.7% |
| Accurate 2460 | <<locked>> | 86% | 56,608 psi | 87% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,651 psi | 86% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 58,160 psi | 89% | 2575 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 56,115 psi | 86% | 2507 fps | 96.3% |
| Accurate 4064 | <<locked>> | 98% | 58,653 psi | 90% | 2589 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,079 psi | 72% | 2513 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 84% | 57,740 psi | 89% | 2441 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 58,189 psi | 90% | 2464 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 57,000 psi | 88% | 2582 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 98% | 57,783 psi | 89% | 2575 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 84% | 58,566 psi | 90% | 2552 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,159 psi | 86% | 2539 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,144 psi | 86% | 2513 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 58,073 psi | 89% | 2638 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,449 psi | 87% | 2690 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 57,043 psi | 88% | 2595 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 57,928 psi | 89% | 2493 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 58,131 psi | 89% | 2618 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,833 psi | 72% | 2520 fps | 98.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,027 psi | 83% | 2657 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,025 psi | 51% | 2274 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,565 psi | 87% | 2441 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,637 psi | 87% | 2598 fps | 99.5% |
| Bofors RP3 | <<locked>> | 98% | 57,899 psi | 89% | 2615 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,766 psi | 84% | 2530 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 90% | 58,291 psi | 90% | 2523 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 58,740 psi | 90% | 2615 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 57,159 psi | 88% | 2661 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 86% | 57,232 psi | 88% | 2536 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 58,204 psi | 90% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,550 psi | 85% | 2575 fps | 99% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,676 psi | 78% | 2559 fps | 96.4% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,506 psi | 85% | 2579 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 92% | 57,493 psi | 88% | 2592 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,917 psi | 66% | 2415 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,318 psi | 87% | 2625 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,925 psi | 54% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,376 psi | 85% | 2549 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 56,942 psi | 88% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 57,479 psi | 88% | 2562 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 94% | 58,247 psi | 90% | 2546 fps | 97.5% |
| IMR 4198 | <<locked>> | 86% | 58,218 psi | 90% | 2454 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,971 psi | 88% | 2562 fps | 97.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,976 psi | 69% | 2464 fps | 98% |
| IMR 4895 | <<locked>> | 94% | 55,796 psi | 86% | 2598 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 56,159 psi | 86% | 2539 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 56,478 psi | 87% | 2530 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 56,188 psi | 86% | 2559 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,956 psi | 88% | 2516 fps | 99.9% |
| Lovex S062 | <<locked>> | 96% | 56,826 psi | 87% | 2559 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,228 psi | 80% | 2507 fps | 97.9% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,777 psi | 77% | 2490 fps | 96.3% |
| Norma 200 | <<locked>> | 82% | 57,899 psi | 89% | 2467 fps | 100% |
| Norma 201 | <<locked>> | 92% | 55,579 psi | 86% | 2530 fps | 100% |
| Norma 202 | <<locked>> | 92% | 56,043 psi | 86% | 2536 fps | 100% |
| Norma 203B | <<locked>> | 96% | 57,174 psi | 88% | 2605 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 47,137 psi | 73% | 2510 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 96% | 57,711 psi | 89% | 2631 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,369 psi | 71% | 2500 fps | 96.3% |
| Ramshot TAC | <<locked>> | 90% | 56,797 psi | 87% | 2559 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,985 psi | 86% | 2575 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 57,638 psi | 89% | 2546 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 54% | 1542 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 56,043 psi | 86% | 2526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,144 psi | 86% | 2559 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 58,334 psi | 90% | 2680 fps | 99.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 57,682 psi | 89% | 2707 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,862 psi | 72% | 2536 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,950 psi | 74% | 2552 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 90% | 56,710 psi | 87% | 2516 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 56,072 psi | 86% | 2530 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 57,406 psi | 88% | 2602 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,766 psi | 84% | 2530 fps | 96.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,228 psi | 80% | 2507 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 56,188 psi | 86% | 2559 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,826 psi | 87% | 2559 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,777 psi | 77% | 2490 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,840 psi | 86% | 2500 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 57,769 psi | 89% | 2201 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,056 psi | 85% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,637 psi | 86% | 2612 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,419 psi | 85% | 2470 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 58,494 psi | 90% | 2582 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,245 psi | 85% | 2556 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 57,943 psi | 89% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 57,522 psi | 88% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,765 psi | 81% | 2464 fps | 96.6% |
| Somchem S321 | <<locked>> | 88% | 57,522 psi | 88% | 2572 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,724 psi | 87% | 2477 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 57,943 psi | 89% | 2575 fps | 99.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 57,638 psi | 89% | 2595 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,945 psi | 65% | 2464 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 88% | 57,653 psi | 89% | 2448 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 57,812 psi | 89% | 2464 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 58,784 psi | 90% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,391 psi | 87% | 2513 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,014 psi | 86% | 2536 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,588 psi | 76% | 2507 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 90% | 56,898 psi | 88% | 2543 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 58,175 psi | 89% | 2559 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,646 psi | 75% | 2513 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,070 psi | 54% | 2346 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,618 psi | 78% | 2497 fps | 99.8% |
| Winchester 748 | <<locked>> | 90% | 56,260 psi | 87% | 2585 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,966 psi | 78% | 2566 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 94% | 58,740 psi | 90% | 2612 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% | 42,699 psi | 66% | 2290 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 54,346 psi | 84% | 2536 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 46,528 psi | 72% | 2385 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,186 psi | 54% | 2218 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,655 psi | 64% | 2349 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 52,634 psi | 81% | 2457 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 33,257 psi | 51% | 2205 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 35,795 psi | 55% | 2316 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 50,981 psi | 78% | 2359 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,372 psi | 79% | 2379 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,160 psi | 60% | 2303 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 33,460 psi | 51% | 2172 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 51,198 psi | 79% | 2464 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,147 psi | 63% | 2313 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 40,393 psi | 62% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,703 psi | 73% | 2490 fps | 99.6% |
| Alliant Power Pro 2000-MR | 49.3 gr | 80% | 35,418 psi | 54% | 2313 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,576 psi | 50% | 2188 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,240 psi | 74% | 2372 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,027 psi | 54% | 2241 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,854 psi | 57% | 2326 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,966 psi | 49% | 2244 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,154 psi | 48% | 2228 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,082 psi | 77% | 2362 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,130 psi | 59% | 2303 fps | 96.4% |
| Bofors RP3 | <<locked>> | 80% | 31,763 psi | 49% | 2185 fps | 96.7% |
| Bofors RP7 | <<locked>> | 96% | 48,588 psi | 75% | 2438 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,207 psi | 66% | 2310 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,479 psi | 61% | 2333 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,178 psi | 66% | 2448 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 47,050 psi | 72% | 2405 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,674 psi | 73% | 2428 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 37,579 psi | 58% | 2287 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 47,398 psi | 73% | 2510 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 98% | 52,301 psi | 80% | 2533 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 39,421 psi | 61% | 2313 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,531 psi | 49% | 2185 fps | 95.7% |
| Hodgdon LEVERevolution | 48.3 gr | 80% | 35,360 psi | 54% | 2283 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 40% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,043 psi | 59% | 2274 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 38,624 psi | 59% | 2316 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,085 psi | 54% | 2201 fps | 96.1% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,385 psi | 74% | 2405 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 48,979 psi | 75% | 2343 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 47,601 psi | 73% | 2425 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 34,722 psi | 53% | 2274 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 35,839 psi | 55% | 2267 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 41,147 psi | 63% | 2313 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 46,166 psi | 71% | 2392 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 37,536 psi | 58% | 2283 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 39,929 psi | 61% | 2254 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 34,809 psi | 54% | 2208 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 41,075 psi | 63% | 2326 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 46,630 psi | 72% | 2441 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 54,288 psi | 84% | 2428 fps | 100% |
| Norma 201 | <<locked>> | 80% | 38,406 psi | 59% | 2264 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 38,551 psi | 59% | 2277 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 34,418 psi | 53% | 2231 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 36,550 psi | 56% | 2320 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 33,953 psi | 52% | 2241 fps | 96% |
| Ramshot Hunter | <<locked>> | 98% | 43,511 psi | 67% | 2451 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 41,162 psi | 63% | 2313 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,161 psi | 62% | 2333 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,686 psi | 69% | 2359 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 40% | 1375 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,122 psi | 71% | 2388 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 43,453 psi | 67% | 2365 fps | 95.2% |
| ReloadSwiss RS 52 | 47.7 gr | 80% | 36,114 psi | 56% | 2323 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,965 psi | 46% | 2205 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,810 psi | 55% | 2329 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,887 psi | 64% | 2444 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 42,235 psi | 65% | 2306 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,709 psi | 56% | 2224 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 29,907 psi | 46% | 2136 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 48,588 psi | 75% | 2438 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 41,075 psi | 63% | 2326 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,536 psi | 58% | 2283 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 34,809 psi | 54% | 2208 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 46,630 psi | 72% | 2441 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,965 psi | 75% | 2408 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,723 psi | 84% | 2169 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,692 psi | 80% | 2477 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,112 psi | 51% | 2228 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,994 psi | 75% | 2392 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,044 psi | 60% | 2287 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,623 psi | 58% | 2274 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,059 psi | 62% | 2231 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,953 psi | 51% | 2113 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 46,209 psi | 71% | 2372 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 44,295 psi | 68% | 2388 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 39,537 psi | 61% | 2234 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,827 psi | 60% | 2290 fps | 97.6% |
| Somchem S355 | <<locked>> | 80% | 31,038 psi | 48% | 2146 fps | 95.8% |
| Somchem S365 | <<locked>> | 86% | 27,006 psi | 42% | 2123 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 45,397 psi | 70% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,219 psi | 62% | 2231 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,563 psi | 55% | 2215 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,361 psi | 56% | 2221 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 29,399 psi | 45% | 2093 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 90% | 35,998 psi | 55% | 2270 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 41,031 psi | 63% | 2310 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 34,896 psi | 54% | 2208 fps | 99.4% |
| Vihtavuori N550 | <<locked>> | 92% | 37,434 psi | 58% | 2320 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 32,822 psi | 50% | 2293 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,082 psi | 49% | 2162 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 40,147 psi | 62% | 2349 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 47,688 psi | 73% | 2513 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,985 psi | 57% | 2280 fps | 97.8% |
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 115 powders for .338 Weatherby RPM loaded with the .338 | 230gr | Axe Copper Spitzer. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,503 fps to 2,707 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 45–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.338" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, Hodgdon LEVERevolution rank at the top here: for .338 Weatherby RPM with the .338 | 230gr | Axe Copper Spitzer they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Norma 204 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.