Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 RCM load data
Case Length (l3):2"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:71 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:15.0
Load data in caliber .338 RCM with .338 | 250gr | Nosler Partition Gold bullet and 107 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>> | 88% | 54,462 psi | 87% | 2310 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 52,968 psi | 85% | 2336 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 55,390 psi | 89% | 2369 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,318 psi | 90% | 2421 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,318 psi | 90% | 2421 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 53,316 psi | 85% | 2326 fps | 96.2% |
| Accurate 4064 | <<locked>> | 96% | 54,853 psi | 88% | 2405 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,934 psi | 75% | 2379 fps | 98.7% |
| Accurate LT-30 | <<locked>> | 82% | 54,317 psi | 87% | 2260 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,737 psi | 88% | 2283 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 53,577 psi | 86% | 2398 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 54,433 psi | 87% | 2395 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 54,810 psi | 88% | 2369 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,289 psi | 90% | 2402 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 56,246 psi | 90% | 2372 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 54,578 psi | 88% | 2448 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,347 psi | 90% | 2543 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,476 psi | 86% | 2411 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 54,462 psi | 87% | 2313 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,476 psi | 87% | 2431 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,746 psi | 75% | 2385 fps | 98.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,824 psi | 86% | 2513 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,953 psi | 53% | 2159 fps | 96.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,142 psi | 85% | 2264 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,924 psi | 85% | 2411 fps | 99.4% |
| Bofors RP3 | <<locked>> | 96% | 53,853 psi | 86% | 2425 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2392 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,071 psi | 88% | 2346 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,940 psi | 88% | 2428 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,214 psi | 85% | 2467 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 84% | 53,505 psi | 86% | 2352 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,360 psi | 87% | 2375 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,506 psi | 89% | 2438 fps | 99.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2425 fps | 96.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 2441 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 90% | 54,099 psi | 87% | 2408 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,004 psi | 69% | 2287 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,898 psi | 90% | 2477 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2454 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,911 psi | 56% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,419 psi | 89% | 2408 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 53,171 psi | 85% | 2388 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,809 psi | 86% | 2379 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,505 psi | 87% | 2362 fps | 97.4% |
| IMR 4198 | <<locked>> | 84% | 54,853 psi | 88% | 2274 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,505 psi | 86% | 2379 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,744 psi | 72% | 2329 fps | 98.4% |
| IMR 4895 | <<locked>> | 94% | 55,811 psi | 89% | 2457 fps | 100% |
| IMR 8208 XBR | <<locked>> | 90% | 56,289 psi | 90% | 2402 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 52,707 psi | 85% | 2346 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,970 psi | 90% | 2418 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,563 psi | 86% | 2333 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 53,258 psi | 85% | 2375 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2369 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,487 psi | 79% | 2352 fps | 96.8% |
| Norma 201 | <<locked>> | 92% | 55,680 psi | 89% | 2392 fps | 100% |
| Norma 202 | <<locked>> | 92% | 55,869 psi | 90% | 2392 fps | 100% |
| Norma 203B | <<locked>> | 94% | 53,621 psi | 86% | 2421 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 46,847 psi | 75% | 2372 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 94% | 53,940 psi | 86% | 2444 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,108 psi | 74% | 2365 fps | 96.8% |
| Ramshot TAC | <<locked>> | 88% | 53,214 psi | 85% | 2375 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,608 psi | 89% | 2431 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,896 psi | 86% | 2359 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,143 psi | 56% | 1440 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,883 psi | 90% | 2382 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,970 psi | 90% | 2418 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,317 psi | 87% | 2487 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,838 psi | 86% | 2516 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,499 psi | 75% | 2398 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,747 psi | 77% | 2418 fps | 98% |
| Rottweil R 901 | <<locked>> | 88% | 53,374 psi | 86% | 2333 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,941 psi | 90% | 2385 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 53,708 psi | 86% | 2415 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2392 fps | 96.9% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,127 psi | 84% | 2369 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,970 psi | 90% | 2418 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 53,258 psi | 85% | 2375 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,487 psi | 79% | 2352 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,912 psi | 90% | 2362 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 55,172 psi | 88% | 2379 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,288 psi | 89% | 2467 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,434 psi | 89% | 2329 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,839 psi | 88% | 2398 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,085 psi | 88% | 2415 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,273 psi | 87% | 2297 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,998 psi | 87% | 2300 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2329 fps | 97% |
| Somchem S321 | <<locked>> | 86% | 53,751 psi | 86% | 2388 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 53,417 psi | 86% | 2300 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,056 psi | 87% | 2388 fps | 99.8% |
| Somchem S355 | <<locked>> | 98% | 54,288 psi | 87% | 2415 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,742 psi | 67% | 2333 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 54,288 psi | 87% | 2270 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,244 psi | 87% | 2287 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 55,230 psi | 89% | 2356 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,231 psi | 90% | 2372 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2395 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,458 psi | 79% | 2372 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 88% | 53,243 psi | 85% | 2356 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 54,505 psi | 87% | 2375 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2382 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,969 psi | 56% | 2224 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2362 fps | 99.9% |
| Winchester 748 | <<locked>> | 90% | 56,028 psi | 90% | 2441 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,517 psi | 81% | 2425 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,824 psi | 88% | 2425 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% | 42,873 psi | 69% | 2162 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,514 psi | 75% | 2254 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,259 psi | 57% | 2096 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,958 psi | 64% | 2201 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,958 psi | 64% | 2201 fps | 99.9% |
| Accurate 2700 | <<locked>> | 94% | 50,009 psi | 80% | 2283 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 33,344 psi | 53% | 2087 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 33,388 psi | 54% | 2149 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 50,937 psi | 82% | 2221 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,343 psi | 82% | 2241 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,175 psi | 63% | 2178 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 33,533 psi | 54% | 2057 fps | 95.9% |
| ADI AR 2219 | <<locked>> | 80% | 51,285 psi | 82% | 2326 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,176 psi | 66% | 2188 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 40,422 psi | 65% | 2182 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,718 psi | 77% | 2352 fps | 99.8% |
| Alliant Power Pro 2000-MR | 45.5 gr | 80% | 35,273 psi | 57% | 2192 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,518 psi | 52% | 2070 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,327 psi | 77% | 2238 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,085 psi | 56% | 2123 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 34,650 psi | 56% | 2159 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 29,936 psi | 48% | 2080 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,125 psi | 50% | 2113 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,024 psi | 80% | 2228 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,072 psi | 61% | 2182 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 31,850 psi | 51% | 2073 fps | 97.3% |
| Bofors RP7 | <<locked>> | 96% | 48,385 psi | 78% | 2306 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,366 psi | 70% | 2185 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,305 psi | 63% | 2205 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,207 psi | 69% | 2320 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 47,123 psi | 76% | 2270 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,514 psi | 76% | 2290 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 35,085 psi | 56% | 2116 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 44,396 psi | 71% | 2329 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 98% | 52,098 psi | 84% | 2395 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 39,465 psi | 63% | 2188 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 29,762 psi | 48% | 2031 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,317 psi | 57% | 2162 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 98% | 48,167 psi | 77% | 2402 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 42% | 1257 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,072 psi | 61% | 2152 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 38,653 psi | 62% | 2188 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,128 psi | 56% | 2083 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 45,411 psi | 73% | 2231 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 48,921 psi | 78% | 2205 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 44,556 psi | 71% | 2247 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 32,518 psi | 52% | 2110 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 35,897 psi | 58% | 2149 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 41,176 psi | 66% | 2188 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 46,050 psi | 74% | 2257 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 37,594 psi | 60% | 2162 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 39,972 psi | 64% | 2133 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 34,882 psi | 56% | 2090 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 38,624 psi | 62% | 2159 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 43,787 psi | 70% | 2267 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 38,522 psi | 62% | 2142 fps | 99% |
| Norma 202 | <<locked>> | 80% | 38,479 psi | 62% | 2152 fps | 100% |
| Norma 203B | <<locked>> | 80% | 34,490 psi | 55% | 2113 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 34,200 psi | 55% | 2149 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 33,866 psi | 54% | 2119 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 96% | 40,625 psi | 65% | 2274 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 41,133 psi | 66% | 2192 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,045 psi | 64% | 2205 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,541 psi | 71% | 2228 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 42% | 1289 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,369 psi | 74% | 2260 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 40,756 psi | 65% | 2195 fps | 95% |
| ReloadSwiss RS 52 | 44.1 gr | 80% | 36,158 psi | 58% | 2201 fps | 97% |
| ReloadSwiss RS 60 | 44.8 gr | 80% | 29,921 psi | 48% | 2090 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 35,810 psi | 57% | 2211 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 39,204 psi | 63% | 2267 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 42,351 psi | 68% | 2178 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 36,695 psi | 59% | 2103 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 30,066 psi | 48% | 2028 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 96% | 48,385 psi | 78% | 2306 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 38,624 psi | 62% | 2159 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,594 psi | 60% | 2162 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 34,882 psi | 56% | 2090 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 96% | 43,787 psi | 70% | 2267 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,805 psi | 78% | 2274 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,517 psi | 83% | 2336 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,096 psi | 50% | 2064 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,110 psi | 79% | 2254 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,986 psi | 63% | 2162 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,695 psi | 60% | 2152 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,147 psi | 64% | 2110 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,025 psi | 53% | 1998 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 43,105 psi | 69% | 2201 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 44,222 psi | 71% | 2257 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 39,610 psi | 64% | 2113 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,769 psi | 62% | 2165 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 31,125 psi | 50% | 2034 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 25,425 psi | 41% | 1972 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 45,469 psi | 73% | 2162 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,292 psi | 65% | 2106 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,636 psi | 57% | 2093 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,506 psi | 59% | 2100 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,515 psi | 47% | 1985 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 33,823 psi | 54% | 2110 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 41,147 psi | 66% | 2185 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,867 psi | 56% | 2090 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 35,114 psi | 56% | 2156 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 30,922 psi | 50% | 2133 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,095 psi | 48% | 2008 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 40,103 psi | 64% | 2221 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 44,686 psi | 72% | 2336 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,753 psi | 59% | 2156 fps | 98.2% |
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 117 powders for .338 RCM loaded with the .338 | 250gr | Nosler Partition Gold. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,543 fps; across all powders the maximum-charge window runs from 1,407 fps to 2,543 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 47–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 52, ReloadSwiss RS 60 rank at the top here: for .338 RCM with the .338 | 250gr | Nosler Partition Gold they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.