Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:230 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:1:14.5
Load data in caliber .338 RCM with .338 | 230gr | Nosler CT FailSafe bullet and 100 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 CFE223.
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% | 54,360 psi | 87% | 2415 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,723 psi | 88% | 2500 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 55,434 psi | 89% | 2510 fps | 99.4% |
| Accurate 2460 | <<locked>> | 88% | 56,188 psi | 90% | 2480 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,273 psi | 87% | 2467 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,041 psi | 87% | 2490 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 54,041 psi | 87% | 2503 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,699 psi | 68% | 2411 fps | 97% |
| Accurate LT-30 | <<locked>> | 84% | 54,592 psi | 88% | 2365 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,998 psi | 88% | 2385 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 53,069 psi | 85% | 2493 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 82% | 55,999 psi | 90% | 2379 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 54,027 psi | 87% | 2487 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 84% | 54,723 psi | 88% | 2474 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,898 psi | 90% | 2500 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,347 psi | 89% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,969 psi | 87% | 2546 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 55,941 psi | 90% | 2638 fps | 99.4% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,231 psi | 90% | 2549 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,244 psi | 87% | 2418 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,041 psi | 87% | 2526 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,555 psi | 70% | 2421 fps | 97.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,879 psi | 80% | 2556 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,534 psi | 86% | 2369 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,188 psi | 90% | 2552 fps | 99.2% |
| Bofors RP3 | <<locked>> | 98% | 53,142 psi | 85% | 2520 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,897 psi | 88% | 2444 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,360 psi | 87% | 2526 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,420 psi | 90% | 2612 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 86% | 53,432 psi | 86% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,433 psi | 87% | 2484 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,056 psi | 88% | 2530 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 92% | 53,519 psi | 86% | 2503 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,827 psi | 64% | 2323 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,158 psi | 88% | 2572 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,519 psi | 55% | 1467 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,998 psi | 88% | 2507 fps | 99.8% |
| IMR 3031 | <<locked>> | 94% | 56,014 psi | 90% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,679 psi | 86% | 2474 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,636 psi | 88% | 2454 fps | 96.4% |
| IMR 4198 | <<locked>> | 86% | 54,998 psi | 88% | 2382 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2470 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,060 psi | 66% | 2365 fps | 96.6% |
| IMR 4895 | <<locked>> | 96% | 55,332 psi | 89% | 2556 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 92% | 55,898 psi | 90% | 2500 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 56,130 psi | 90% | 2487 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 56,202 psi | 90% | 2490 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,347 psi | 89% | 2516 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,708 psi | 86% | 2434 fps | 99.5% |
| Lovex S062 | <<locked>> | 98% | 56,072 psi | 90% | 2513 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,544 psi | 78% | 2411 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 54,230 psi | 87% | 2395 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,216 psi | 89% | 2490 fps | 100% |
| Norma 202 | <<locked>> | 94% | 55,593 psi | 89% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,333 psi | 90% | 2559 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 43,265 psi | 69% | 2411 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 96% | 53,258 psi | 85% | 2536 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 53,084 psi | 85% | 2467 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,564 psi | 89% | 2533 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,128 psi | 87% | 2461 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,679 psi | 56% | 1499 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,869 psi | 90% | 2487 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,608 psi | 89% | 2510 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,417 psi | 86% | 2579 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,316 psi | 85% | 2612 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,714 psi | 68% | 2428 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 90% | 53,345 psi | 86% | 2438 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,448 psi | 89% | 2484 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,707 psi | 85% | 2507 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 56,130 psi | 90% | 2487 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,544 psi | 78% | 2411 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,347 psi | 89% | 2516 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 56,072 psi | 90% | 2513 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,956 psi | 90% | 2464 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,259 psi | 89% | 2142 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,027 psi | 88% | 2484 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2562 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,230 psi | 89% | 2434 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,476 psi | 87% | 2490 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,723 psi | 88% | 2513 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,534 psi | 87% | 2402 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,679 psi | 86% | 2395 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,780 psi | 86% | 2490 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 53,345 psi | 86% | 2402 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,012 psi | 87% | 2490 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,403 psi | 86% | 2507 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,479 psi | 62% | 2362 fps | 98.8% |
| Vihtavuori N120 | <<locked>> | 82% | 55,883 psi | 90% | 2333 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,201 psi | 87% | 2372 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,346 psi | 87% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,476 psi | 87% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,956 psi | 90% | 2474 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,692 psi | 83% | 2448 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,745 psi | 73% | 2411 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 90% | 53,156 psi | 85% | 2457 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 54,186 psi | 87% | 2477 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,672 psi | 72% | 2418 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,094 psi | 76% | 2405 fps | 99.1% |
| Winchester 748 | <<locked>> | 92% | 55,463 psi | 89% | 2539 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,317 psi | 87% | 2520 fps | 99.8% |
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% | 40,045 psi | 64% | 2218 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,242 psi | 82% | 2451 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 51,576 psi | 83% | 2457 fps | 99.1% |
| Accurate 2460 | <<locked>> | 80% | 43,308 psi | 69% | 2306 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 32,387 psi | 52% | 2139 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 38,319 psi | 61% | 2260 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 30,647 psi | 49% | 2126 fps | 98.8% |
| Accurate 4350 | <<locked>> | 96% | 37,275 psi | 60% | 2316 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 48,254 psi | 77% | 2287 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,631 psi | 78% | 2303 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,564 psi | 59% | 2218 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 80% | 52,750 psi | 85% | 2339 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 35,302 psi | 57% | 2178 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 47,921 psi | 77% | 2385 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,537 psi | 62% | 2234 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 37,231 psi | 60% | 2238 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,367 psi | 71% | 2402 fps | 98.9% |
| Alliant Power Pro 2000-MR | 47.8 gr | 84% | 37,623 psi | 60% | 2323 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,037 psi | 48% | 2106 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,310 psi | 73% | 2303 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 34,766 psi | 56% | 2205 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,624 psi | 62% | 2326 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,837 psi | 54% | 2254 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,181 psi | 76% | 2287 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,768 psi | 61% | 2264 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 29,298 psi | 47% | 2103 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,843 psi | 65% | 2234 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,405 psi | 58% | 2247 fps | 98.4% |
| Hodgdon CFE223 | 46.6 gr | 80% | 40,059 psi | 64% | 2359 fps | 97% |
| Hodgdon H322 | <<locked>> | 80% | 44,005 psi | 71% | 2329 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,338 psi | 71% | 2346 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,595 psi | 63% | 2290 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 36,796 psi | 59% | 2231 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,141 psi | 53% | 2188 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,822 psi | 53% | 2195 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,614 psi | 41% | 1306 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,578 psi | 57% | 2192 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 35,650 psi | 57% | 2238 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,824 psi | 56% | 2162 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 51,271 psi | 82% | 2408 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 46,137 psi | 74% | 2270 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 50,125 psi | 80% | 2421 fps | 95.3% |
| IMR 4831 | <<locked>> | 96% | 36,201 psi | 58% | 2274 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 33,315 psi | 53% | 2185 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,537 psi | 62% | 2234 fps | 98.3% |
| Lovex D073.4 | <<locked>> | 80% | 52,475 psi | 84% | 2441 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,844 psi | 69% | 2306 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 34,664 psi | 56% | 2205 fps | 98.9% |
| Lovex S060 | <<locked>> | 80% | 37,652 psi | 60% | 2175 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 32,445 psi | 52% | 2129 fps | 96.8% |
| Lovex S065 | <<locked>> | 96% | 42,989 psi | 69% | 2323 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 51,068 psi | 82% | 2356 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,969 psi | 58% | 2185 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 35,810 psi | 57% | 2198 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 31,981 psi | 51% | 2149 fps | 95.1% |
| Norma URP | <<locked>> | 96% | 38,218 psi | 61% | 2316 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 82% | 33,547 psi | 54% | 2198 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 40,988 psi | 66% | 2277 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,260 psi | 60% | 2244 fps | 96.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,800 psi | 67% | 2277 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,860 psi | 41% | 1339 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,439 psi | 70% | 2313 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 45,948 psi | 74% | 2369 fps | 95.2% |
| ReloadSwiss RS 52 | 45.2 gr | 82% | 35,694 psi | 57% | 2283 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,905 psi | 45% | 2110 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 40,001 psi | 64% | 2379 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 39,668 psi | 64% | 2231 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 34,258 psi | 55% | 2142 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 84% | 31,488 psi | 50% | 2146 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 52,475 psi | 84% | 2441 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,989 psi | 69% | 2323 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,664 psi | 56% | 2205 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 32,445 psi | 52% | 2129 fps | 96.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,745 psi | 73% | 2323 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,736 psi | 85% | 2116 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,225 psi | 77% | 2395 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,837 psi | 53% | 2188 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,021 psi | 74% | 2316 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 38,870 psi | 62% | 2247 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,128 psi | 56% | 2192 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,710 psi | 60% | 2159 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,821 psi | 49% | 2044 fps | 99.2% |
| Somchem S321 | <<locked>> | 80% | 41,220 psi | 66% | 2303 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 37,115 psi | 60% | 2162 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 36,013 psi | 58% | 2205 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 30,632 psi | 49% | 2110 fps | 95.1% |
| Somchem S365 | <<locked>> | 90% | 28,297 psi | 45% | 2129 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 52,649 psi | 84% | 2297 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,772 psi | 69% | 2224 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,739 psi | 61% | 2159 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,938 psi | 53% | 2139 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,953 psi | 54% | 2146 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 27,311 psi | 44% | 2014 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 37,840 psi | 61% | 2274 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 38,435 psi | 62% | 2231 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 32,416 psi | 52% | 2129 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 96% | 39,276 psi | 63% | 2323 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 31,952 psi | 51% | 2123 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 37,144 psi | 60% | 2264 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,084 psi | 55% | 2192 fps | 96.5% |
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 100 powders for .338 RCM loaded with the .338 | 230gr | Nosler CT FailSafe. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,467 fps to 2,638 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 230.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, 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 CFE223 rank at the top here: for .338 RCM with the .338 | 230gr | Nosler CT FailSafe 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.