Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:265 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 | 265gr | Nosler AccuBond Long Range bullet and 108 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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>> | 86% | 56,260 psi | 87% | 2280 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 58,378 psi | 90% | 2349 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 58,059 psi | 89% | 2343 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,565 psi | 87% | 2365 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 57,595 psi | 89% | 2356 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,985 psi | 58% | 2185 fps | 96.1% |
| Accurate 4064 | <<locked>> | 94% | 57,711 psi | 89% | 2385 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,577 psi | 82% | 2425 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 82% | 58,537 psi | 90% | 2267 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 58,682 psi | 90% | 2418 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,057 psi | 86% | 2375 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,856 psi | 89% | 2375 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,187 psi | 85% | 2306 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 58,595 psi | 90% | 2533 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,883 psi | 86% | 2392 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,202 psi | 86% | 2283 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,782 psi | 87% | 2415 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,837 psi | 80% | 2425 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,492 psi | 87% | 2503 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,956 psi | 57% | 2215 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,625 psi | 63% | 2339 fps | 98.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,609 psi | 89% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 58,624 psi | 90% | 2441 fps | 100% |
| Bofors RP3 | <<locked>> | 94% | 56,579 psi | 87% | 2411 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,666 psi | 87% | 2385 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,246 psi | 87% | 2316 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,942 psi | 88% | 2405 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,347 psi | 85% | 2448 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 54,984 psi | 85% | 2320 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,115 psi | 86% | 2349 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 57,537 psi | 89% | 2421 fps | 99.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,768 psi | 87% | 2470 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 98% | 57,856 psi | 89% | 2438 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,825 psi | 86% | 2385 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,935 psi | 74% | 2320 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 58,595 psi | 90% | 2457 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 57,957 psi | 89% | 2510 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 54% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,203 psi | 88% | 2388 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,709 psi | 86% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,651 psi | 86% | 2359 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,840 psi | 86% | 2346 fps | 98.5% |
| IMR 4198 | <<locked>> | 82% | 56,188 psi | 86% | 2241 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,272 psi | 82% | 2365 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 98% | 58,740 psi | 90% | 2411 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,691 psi | 78% | 2372 fps | 99.7% |
| IMR 4895 | <<locked>> | 92% | 58,204 psi | 90% | 2441 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 57,856 psi | 89% | 2375 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 58,291 psi | 90% | 2362 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 58,566 psi | 90% | 2395 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 58,305 psi | 90% | 2352 fps | 100% |
| Lovex S062 | <<locked>> | 94% | 58,711 psi | 90% | 2395 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 57,885 psi | 89% | 2405 fps | 99.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,187 psi | 85% | 2395 fps | 98.7% |
| Norma 201 | <<locked>> | 90% | 57,435 psi | 88% | 2369 fps | 100% |
| Norma 202 | <<locked>> | 90% | 58,001 psi | 89% | 2369 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,927 psi | 86% | 2405 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,635 psi | 83% | 2405 fps | 96.6% |
| Norma URPᴾ | <<locked>> | 100% | 52,881 psi | 81% | 2415 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 92% | 56,405 psi | 87% | 2431 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,517 psi | 79% | 2411 fps | 98.8% |
| Ramshot TAC | <<locked>> | 88% | 58,262 psi | 90% | 2402 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,653 psi | 89% | 2415 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 86% | 58,784 psi | 90% | 2379 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 55% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,638 psi | 89% | 2359 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,914 psi | 89% | 2408 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,188 psi | 88% | 2474 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,347 psi | 87% | 2500 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,011 psi | 82% | 2444 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,200 psi | 82% | 2467 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 88% | 58,537 psi | 90% | 2346 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,914 psi | 89% | 2365 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,115 psi | 86% | 2398 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,666 psi | 87% | 2385 fps | 98.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 57,885 psi | 89% | 2405 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 58,566 psi | 90% | 2395 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 58,711 psi | 90% | 2395 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,187 psi | 85% | 2395 fps | 98.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,058 psi | 88% | 2333 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 58,059 psi | 89% | 2457 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,174 psi | 88% | 2300 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,536 psi | 87% | 2382 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,130 psi | 88% | 2398 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,912 psi | 86% | 2274 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,738 psi | 86% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 58,407 psi | 90% | 2365 fps | 98.8% |
| Somchem S321 | <<locked>> | 84% | 55,405 psi | 85% | 2362 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 58,349 psi | 90% | 2310 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,115 psi | 86% | 2372 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 56,463 psi | 87% | 2395 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,268 psi | 73% | 2372 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 44,048 psi | 68% | 2270 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 84% | 55,550 psi | 85% | 2238 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,057 psi | 86% | 2257 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,421 psi | 88% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 58,508 psi | 90% | 2349 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 58,363 psi | 90% | 2379 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,521 psi | 85% | 2408 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 88% | 58,436 psi | 90% | 2375 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,492 psi | 87% | 2352 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,259 psi | 83% | 2415 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,929 psi | 61% | 2277 fps | 98.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,927 psi | 86% | 2392 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 58,189 psi | 90% | 2418 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 56,768 psi | 87% | 2470 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,808 psi | 50% | 2211 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 56,942 psi | 88% | 2405 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% | 47,007 psi | 72% | 2172 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,126 psi | 79% | 2267 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,624 psi | 61% | 2116 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,195 psi | 71% | 2238 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,599 psi | 69% | 2182 fps | 95.6% |
| Accurate 3100 | <<locked>> | 98% | 35,563 psi | 55% | 2142 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 37,492 psi | 58% | 2116 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,009 psi | 48% | 2057 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 55,143 psi | 85% | 2228 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 43,265 psi | 67% | 2208 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 36,695 psi | 56% | 2083 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,310 psi | 70% | 2211 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 45,353 psi | 70% | 2195 fps | 100% |
| Alliant Power Pro 2000-MR | 48.3 gr | 80% | 38,972 psi | 60% | 2234 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,230 psi | 56% | 2103 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,823 psi | 81% | 2244 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,015 psi | 60% | 2159 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,110 psi | 46% | 2024 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,227 psi | 48% | 2083 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,383 psi | 42% | 1991 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,243 psi | 51% | 2185 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 54,172 psi | 83% | 2231 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,105 psi | 65% | 2211 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 35,621 psi | 55% | 2106 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 41,829 psi | 64% | 2172 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,152 psi | 73% | 2201 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,700 psi | 67% | 2231 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,066 psi | 74% | 2349 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 51,677 psi | 80% | 2280 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,562 psi | 81% | 2310 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,550 psi | 56% | 2110 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 38,406 psi | 59% | 2192 fps | 95% |
| Hodgdon H4350 | <<locked>> | 90% | 44,991 psi | 69% | 2257 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 43,613 psi | 67% | 2218 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 25,860 psi | 40% | 1903 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,421 psi | 61% | 2195 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 92% | 43,584 psi | 67% | 2303 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 41% | 1247 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,756 psi | 64% | 2175 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 43,018 psi | 66% | 2205 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,522 psi | 59% | 2110 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,060 psi | 63% | 2129 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 53,084 psi | 82% | 2208 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 41,727 psi | 64% | 2195 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 40,988 psi | 63% | 2156 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 30,313 psi | 47% | 2024 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,943 psi | 61% | 2182 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 45,310 psi | 70% | 2211 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 51,097 psi | 79% | 2280 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,989 psi | 65% | 2188 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,337 psi | 67% | 2152 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 38,406 psi | 59% | 2116 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 35,694 psi | 55% | 2070 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 38,072 psi | 59% | 2133 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,424 psi | 65% | 2169 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 42,511 psi | 65% | 2172 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,435 psi | 59% | 2149 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 47,094 psi | 72% | 2313 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 31,734 psi | 49% | 2060 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 37,637 psi | 58% | 2159 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 37,594 psi | 58% | 2185 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,991 psi | 69% | 2221 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,498 psi | 68% | 2238 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,646 psi | 75% | 2251 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 41% | 1276 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,502 psi | 78% | 2274 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 37,130 psi | 57% | 2096 fps | 95.2% |
| ReloadSwiss RS 52 | 46.8 gr | 80% | 40,538 psi | 62% | 2241 fps | 98.9% |
| ReloadSwiss RS 60 | 47.6 gr | 80% | 33,243 psi | 51% | 2136 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 30,951 psi | 48% | 2070 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,650 psi | 55% | 2172 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 46,325 psi | 71% | 2195 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,248 psi | 62% | 2126 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,721 psi | 52% | 2064 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 41,829 psi | 64% | 2172 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,694 psi | 55% | 2070 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,989 psi | 65% | 2188 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,406 psi | 59% | 2116 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 38,072 psi | 59% | 2133 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,374 psi | 82% | 2290 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,505 psi | 53% | 2103 fps | 97.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,708 psi | 83% | 2264 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,294 psi | 67% | 2201 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,539 psi | 64% | 2182 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,845 psi | 67% | 2123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,361 psi | 56% | 2018 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,624 psi | 61% | 2110 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,631 psi | 75% | 2277 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,410 psi | 67% | 2126 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,931 psi | 66% | 2195 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 34,664 psi | 53% | 2070 fps | 98.5% |
| Somchem S365 | <<locked>> | 80% | 25,048 psi | 39% | 1932 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 41,394 psi | 64% | 2228 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 49,472 psi | 76% | 2169 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,106 psi | 68% | 2116 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,711 psi | 61% | 2110 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,379 psi | 62% | 2119 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,909 psi | 51% | 2018 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 31,169 psi | 48% | 2018 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 45,107 psi | 69% | 2205 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,609 psi | 59% | 2113 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,605 psi | 50% | 2067 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 29,022 psi | 45% | 2054 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,124 psi | 45% | 1955 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 44,744 psi | 69% | 2247 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 38,406 psi | 59% | 2192 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,253 psi | 42% | 2054 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,930 psi | 63% | 2185 fps | 99.6% |
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 126 powders for .338 Weatherby RPM loaded with the .338 | 265gr | Nosler AccuBond Long Range. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,533 fps; across all powders the maximum-charge window runs from 1,398 fps to 2,533 fps. Accurate 3100 gives the best case fill at 100 %, and 126 of the 126 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 265.0 gr projectile in 0.338" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, ADI AR 2209 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .338 Weatherby RPM with the .338 | 265gr | Nosler AccuBond Long Range they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.