Load Specifications
Bullet Manufacturer:Barnes
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:1:13.5
Load data in caliber .338 RCM with .338 | 250gr | Barnes Banded Solid RN bullet and 105 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% | 56,304 psi | 90% | 2316 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,420 psi | 90% | 2405 fps | 99.7% |
| Accurate 2460 | <<locked>> | 86% | 54,795 psi | 88% | 2346 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 53,214 psi | 85% | 2333 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 56,376 psi | 90% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,273 psi | 87% | 2329 fps | 96.1% |
| Accurate 4064 | <<locked>> | 96% | 53,214 psi | 85% | 2372 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,005 psi | 72% | 2336 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 84% | 56,144 psi | 90% | 2267 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 53,272 psi | 85% | 2251 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,259 psi | 89% | 2405 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 98% | 55,970 psi | 90% | 2398 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 53,272 psi | 85% | 2336 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,433 psi | 87% | 2362 fps | 100% |
| Alliant AR-Comp | <<locked>> | 90% | 54,172 psi | 87% | 2339 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,304 psi | 90% | 2454 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,491 psi | 87% | 2503 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 54,998 psi | 88% | 2415 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,434 psi | 90% | 2323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,956 psi | 90% | 2434 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,353 psi | 73% | 2346 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,924 psi | 83% | 2474 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,071 psi | 88% | 2270 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,752 psi | 88% | 2418 fps | 99.5% |
| Bofors RP3 | <<locked>> | 98% | 55,390 psi | 89% | 2428 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2352 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 88% | 53,505 psi | 86% | 2310 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 53,185 psi | 85% | 2395 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,926 psi | 88% | 2474 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 86% | 55,317 psi | 89% | 2359 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,362 psi | 90% | 2385 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 53,548 psi | 86% | 2398 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2385 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 92% | 55,709 psi | 89% | 2415 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,307 psi | 66% | 2244 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,157 psi | 87% | 2441 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,664 psi | 56% | 1391 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,606 psi | 86% | 2372 fps | 99.9% |
| IMR 3031 | <<locked>> | 92% | 54,969 psi | 88% | 2395 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,593 psi | 89% | 2385 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 52,968 psi | 85% | 2323 fps | 96.8% |
| IMR 4198 | <<locked>> | 84% | 53,374 psi | 86% | 2244 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2385 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,207 psi | 69% | 2293 fps | 97.9% |
| IMR 4895 | <<locked>> | 94% | 53,998 psi | 87% | 2421 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 90% | 54,433 psi | 87% | 2362 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 54,636 psi | 88% | 2356 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,056 psi | 87% | 2382 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,550 psi | 89% | 2343 fps | 99.9% |
| Lovex S062 | <<locked>> | 96% | 54,926 psi | 88% | 2382 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2333 fps | 97.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,776 psi | 77% | 2313 fps | 96.2% |
| Norma 200 | <<locked>> | 82% | 56,347 psi | 90% | 2297 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,838 psi | 86% | 2356 fps | 100% |
| Norma 202 | <<locked>> | 92% | 54,230 psi | 87% | 2362 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,056 psi | 88% | 2425 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 45,121 psi | 72% | 2333 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 96% | 55,622 psi | 89% | 2451 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,657 psi | 72% | 2326 fps | 96.1% |
| Ramshot TAC | <<locked>> | 90% | 55,100 psi | 88% | 2382 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,983 psi | 87% | 2398 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,985 psi | 90% | 2372 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 56% | 1430 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,215 psi | 87% | 2349 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,172 psi | 87% | 2382 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 56,086 psi | 90% | 2493 fps | 99.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2520 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,889 psi | 72% | 2359 fps | 97.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,166 psi | 74% | 2375 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 90% | 55,085 psi | 88% | 2339 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,404 psi | 87% | 2356 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,911 psi | 88% | 2418 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 52,895 psi | 85% | 2352 fps | 96.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2333 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,056 psi | 87% | 2382 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,926 psi | 88% | 2382 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,776 psi | 77% | 2313 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,360 psi | 87% | 2329 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,534 psi | 86% | 2346 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,417 psi | 86% | 2431 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,041 psi | 87% | 2300 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,895 psi | 85% | 2359 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,388 psi | 86% | 2379 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,275 psi | 90% | 2306 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,535 psi | 89% | 2303 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,734 psi | 81% | 2293 fps | 96.4% |
| Somchem S321 | <<locked>> | 88% | 55,854 psi | 90% | 2398 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 54,984 psi | 88% | 2306 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 56,057 psi | 90% | 2398 fps | 99.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2418 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,205 psi | 64% | 2290 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 88% | 56,057 psi | 90% | 2277 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,188 psi | 90% | 2293 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 53,447 psi | 86% | 2326 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,723 psi | 88% | 2343 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2359 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,674 psi | 76% | 2333 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 90% | 54,984 psi | 88% | 2362 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 56,144 psi | 90% | 2382 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2336 fps | 98.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 33,533 psi | 54% | 2182 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2323 fps | 99.7% |
| Winchester 748 | <<locked>> | 90% | 54,143 psi | 87% | 2405 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2385 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 92% | 53,171 psi | 85% | 2392 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% | 41,582 psi | 67% | 2133 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,997 psi | 85% | 2359 fps | 99.4% |
| Accurate 2460 | <<locked>> | 80% | 44,846 psi | 72% | 2218 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 34,026 psi | 55% | 2064 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,074 psi | 64% | 2182 fps | 99.9% |
| Accurate 2700 | <<locked>> | 92% | 50,792 psi | 81% | 2283 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 32,213 psi | 52% | 2054 fps | 99.5% |
| Accurate 4350 | <<locked>> | 92% | 34,214 psi | 55% | 2156 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 49,748 psi | 80% | 2195 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,140 psi | 80% | 2211 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,116 psi | 61% | 2146 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 32,401 psi | 52% | 2021 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 49,763 psi | 80% | 2293 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,132 psi | 64% | 2159 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 80% | 39,030 psi | 63% | 2152 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,412 psi | 74% | 2320 fps | 99.6% |
| Alliant Power Pro 2000-MR | 44.1 gr | 80% | 34,301 psi | 55% | 2152 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,444 psi | 50% | 2041 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,905 psi | 75% | 2208 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,069 psi | 55% | 2090 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,607 psi | 57% | 2165 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,053 psi | 50% | 2093 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,617 psi | 78% | 2195 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,811 psi | 59% | 2142 fps | 96.3% |
| Bofors RP3 | <<locked>> | 80% | 30,661 psi | 49% | 2037 fps | 96.7% |
| Bofors RP7 | <<locked>> | 98% | 49,806 psi | 80% | 2310 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,076 psi | 67% | 2149 fps | 99.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,116 psi | 61% | 2172 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,698 psi | 67% | 2280 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 45,556 psi | 73% | 2238 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,224 psi | 74% | 2260 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 36,318 psi | 58% | 2129 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 45,730 psi | 73% | 2336 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 38,406 psi | 62% | 2156 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,487 psi | 49% | 2034 fps | 95.6% |
| Hodgdon LEVERevolution | 43.2 gr | 80% | 34,171 psi | 55% | 2126 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 41% | 1240 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,840 psi | 59% | 2116 fps | 97.9% |
| IMR 3031 | <<locked>> | 80% | 37,347 psi | 60% | 2159 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,895 psi | 54% | 2047 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,789 psi | 75% | 2234 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 47,688 psi | 76% | 2178 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,021 psi | 74% | 2254 fps | 95.2% |
| IMR 4831 | <<locked>> | 92% | 33,547 psi | 54% | 2119 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 34,838 psi | 56% | 2116 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 40,132 psi | 64% | 2159 fps | 99.1% |
| Lovex D073.5 | <<locked>> | 80% | 44,730 psi | 72% | 2224 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 36,245 psi | 58% | 2126 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 38,769 psi | 62% | 2096 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 33,591 psi | 54% | 2054 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 39,639 psi | 64% | 2165 fps | 95.3% |
| Lovex S070 | <<locked>> | 98% | 44,976 psi | 72% | 2270 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 53,011 psi | 85% | 2260 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,449 psi | 60% | 2110 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 37,347 psi | 60% | 2119 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 33,460 psi | 54% | 2080 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 35,346 psi | 57% | 2159 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 32,837 psi | 53% | 2087 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 98% | 41,872 psi | 67% | 2277 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 39,856 psi | 64% | 2152 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,885 psi | 62% | 2172 fps | 97.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,453 psi | 70% | 2198 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 42% | 1273 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,976 psi | 72% | 2228 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 41,945 psi | 67% | 2201 fps | 95.1% |
| ReloadSwiss RS 52 | 42.7 gr | 80% | 34,911 psi | 56% | 2162 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,066 psi | 47% | 2054 fps | 97.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,666 psi | 59% | 2215 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,451 psi | 65% | 2274 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 41,147 psi | 66% | 2149 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 35,578 psi | 57% | 2070 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 28,848 psi | 46% | 1988 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 98% | 49,806 psi | 80% | 2310 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,639 psi | 64% | 2165 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,245 psi | 58% | 2126 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 33,591 psi | 54% | 2054 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 44,976 psi | 72% | 2270 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,529 psi | 76% | 2241 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,125 psi | 80% | 2306 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,140 psi | 52% | 2077 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,645 psi | 76% | 2224 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,840 psi | 61% | 2129 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,521 psi | 59% | 2119 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,015 psi | 63% | 2077 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,010 psi | 51% | 1969 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 44,324 psi | 71% | 2205 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 42,714 psi | 68% | 2221 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 38,580 psi | 62% | 2083 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,449 psi | 60% | 2129 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 30,153 psi | 48% | 2001 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 26,092 psi | 42% | 1978 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 44,237 psi | 71% | 2133 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,131 psi | 63% | 2077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,389 psi | 55% | 2060 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,230 psi | 56% | 2067 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 28,427 psi | 46% | 1949 fps | 96.7% |
| Vihtavuori N160 | <<locked>> | 90% | 34,693 psi | 56% | 2113 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 39,856 psi | 64% | 2152 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,953 psi | 54% | 2060 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 92% | 36,071 psi | 58% | 2162 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 31,560 psi | 51% | 2136 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,966 psi | 50% | 2011 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 38,783 psi | 62% | 2188 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 45,730 psi | 73% | 2336 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,621 psi | 57% | 2123 fps | 97.7% |
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 105 powders for .338 RCM loaded with the .338 | 250gr | Barnes Banded Solid RN. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,391 fps to 2,520 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:13.5 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, Hodgdon LEVERevolution rank at the top here: for .338 RCM with the .338 | 250gr | Barnes Banded Solid RN 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.