Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:225 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 | 225gr | Nosler AccuBond bullet and 99 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.
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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>> | 92% | 55,390 psi | 89% | 2444 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 56,231 psi | 90% | 2533 fps | 99.1% |
| Accurate 2230 | <<locked>> | 82% | 53,171 psi | 85% | 2497 fps | 99% |
| Accurate 2460 | <<locked>> | 88% | 53,969 psi | 87% | 2470 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,303 psi | 89% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,129 psi | 88% | 2523 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,621 psi | 88% | 2530 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,147 psi | 64% | 2382 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 86% | 56,144 psi | 90% | 2402 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,287 psi | 85% | 2382 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,172 psi | 87% | 2523 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 82% | 54,273 psi | 87% | 2379 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,027 psi | 88% | 2513 fps | 99% |
| ADI AR 2219 | <<locked>> | 86% | 56,217 psi | 90% | 2510 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,882 psi | 86% | 2487 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 94% | 56,304 psi | 90% | 2510 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,201 psi | 89% | 2582 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,490 psi | 86% | 2615 fps | 98.8% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 53,795 psi | 86% | 2533 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,506 psi | 89% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 54,911 psi | 88% | 2556 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,756 psi | 67% | 2398 fps | 96.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,688 psi | 76% | 2533 fps | 99% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,259 psi | 89% | 2395 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,114 psi | 88% | 2405 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,983 psi | 87% | 2539 fps | 98.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2549 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,115 psi | 90% | 2474 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 55,637 psi | 89% | 2559 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 53,969 psi | 87% | 2595 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 54,447 psi | 87% | 2490 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 55,579 psi | 89% | 2516 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 2559 fps | 98.3% |
| Hodgdon H4198 | <<locked>> | 82% | 54,853 psi | 88% | 2402 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 54,621 psi | 88% | 2533 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 37,826 psi | 61% | 2297 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 52,837 psi | 85% | 2559 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,316 psi | 55% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 56,289 psi | 90% | 2536 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 53,606 psi | 86% | 2523 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 54,563 psi | 87% | 2500 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 96% | 56,115 psi | 90% | 2487 fps | 96.1% |
| IMR 4198 | <<locked>> | 88% | 56,333 psi | 90% | 2418 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 56,202 psi | 90% | 2582 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 92% | 53,882 psi | 86% | 2487 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 82% | 53,809 psi | 86% | 2477 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 53,737 psi | 86% | 2477 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 52,765 psi | 85% | 2503 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 54,998 psi | 88% | 2464 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 53,708 psi | 86% | 2500 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2395 fps | 95.7% |
| Norma 200 | <<locked>> | 84% | 55,695 psi | 89% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,185 psi | 85% | 2480 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 53,185 psi | 85% | 2484 fps | 100% |
| Norma 203B | <<locked>> | 98% | 53,954 psi | 87% | 2543 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 41,365 psi | 66% | 2388 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 98% | 54,259 psi | 87% | 2566 fps | 99.3% |
| Ramshot TAC | <<locked>> | 92% | 54,389 psi | 87% | 2497 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,272 psi | 85% | 2520 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,405 psi | 89% | 2493 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,447 psi | 55% | 1503 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,737 psi | 86% | 2480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,519 psi | 86% | 2493 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 54,520 psi | 87% | 2612 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,995 psi | 82% | 2595 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 54,302 psi | 87% | 2467 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,359 psi | 86% | 2474 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,241 psi | 81% | 2490 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 82% | 53,809 psi | 86% | 2477 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,514 psi | 75% | 2395 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 94% | 52,765 psi | 85% | 2503 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 53,708 psi | 86% | 2500 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 53,954 psi | 87% | 2454 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 53,983 psi | 87% | 2146 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 52,924 psi | 85% | 2477 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,417 psi | 84% | 2549 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,200 psi | 85% | 2431 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 55,869 psi | 90% | 2523 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 56,057 psi | 90% | 2543 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 55,811 psi | 89% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,621 psi | 88% | 2425 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,969 psi | 88% | 2523 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 54,447 psi | 87% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,303 psi | 89% | 2520 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2490 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,782 psi | 59% | 2343 fps | 98% |
| Vihtavuori N120 | <<locked>> | 82% | 54,128 psi | 87% | 2333 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,622 psi | 89% | 2408 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,492 psi | 89% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,114 psi | 88% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 53,563 psi | 86% | 2464 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,414 psi | 79% | 2434 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,497 psi | 70% | 2388 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 92% | 54,433 psi | 87% | 2487 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 55,100 psi | 88% | 2507 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,511 psi | 68% | 2395 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,034 psi | 72% | 2382 fps | 98.4% |
| Winchester 748 | <<locked>> | 92% | 52,982 psi | 85% | 2530 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 55,622 psi | 89% | 2552 fps | 99.7% |
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% | 38,334 psi | 61% | 2208 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,400 psi | 79% | 2438 fps | 98.2% |
| Accurate 2230 | <<locked>> | 80% | 49,705 psi | 80% | 2448 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 41,350 psi | 66% | 2293 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 30,748 psi | 49% | 2126 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,651 psi | 59% | 2247 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 29,080 psi | 47% | 2106 fps | 98.1% |
| Accurate 4350 | <<locked>> | 98% | 37,594 psi | 60% | 2336 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 46,920 psi | 75% | 2283 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,297 psi | 76% | 2300 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,070 psi | 56% | 2201 fps | 95.6% |
| ADI AR 2207 | <<locked>> | 80% | 50,966 psi | 82% | 2339 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 36,013 psi | 58% | 2208 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 46,050 psi | 74% | 2379 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,028 psi | 59% | 2221 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,650 psi | 57% | 2231 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,453 psi | 68% | 2385 fps | 98.3% |
| Alliant Power Pro 2000-MR | 47.8 gr | 86% | 38,537 psi | 62% | 2352 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,676 psi | 49% | 2136 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,700 psi | 70% | 2297 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,389 psi | 57% | 2231 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,392 psi | 63% | 2352 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,447 psi | 55% | 2277 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,054 psi | 83% | 2356 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,498 psi | 73% | 2280 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,609 psi | 62% | 2293 fps | 95.4% |
| Bofors RP3 | <<locked>> | 84% | 31,821 psi | 51% | 2178 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,334 psi | 63% | 2221 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,664 psi | 56% | 2228 fps | 97.6% |
| Hodgdon CFE223 | 45.5 gr | 80% | 38,305 psi | 61% | 2336 fps | 96% |
| Hodgdon H322 | <<locked>> | 80% | 42,206 psi | 68% | 2320 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,743 psi | 69% | 2336 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 40,509 psi | 65% | 2323 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 51,605 psi | 83% | 2362 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,302 psi | 57% | 2215 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,576 psi | 54% | 2208 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,488 psi | 50% | 2178 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,512 psi | 41% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,142 psi | 55% | 2175 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 33,895 psi | 54% | 2221 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 35,534 psi | 57% | 2192 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,576 psi | 84% | 2438 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 44,512 psi | 71% | 2267 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,055 psi | 55% | 2215 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 37,028 psi | 59% | 2221 fps | 97.5% |
| Lovex D073.4 | <<locked>> | 80% | 50,256 psi | 81% | 2431 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,176 psi | 66% | 2293 fps | 99.1% |
| Lovex D073.6 | <<locked>> | 80% | 33,054 psi | 53% | 2188 fps | 98.2% |
| Lovex S060 | <<locked>> | 80% | 36,274 psi | 58% | 2162 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 30,995 psi | 50% | 2110 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 43,859 psi | 70% | 2352 fps | 95% |
| Norma 200 | <<locked>> | 80% | 49,110 psi | 79% | 2349 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,476 psi | 55% | 2169 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 34,258 psi | 55% | 2185 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 34,722 psi | 56% | 2221 fps | 95.6% |
| Norma URP | <<locked>> | 98% | 38,972 psi | 62% | 2343 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 34,461 psi | 55% | 2231 fps | 95% |
| Ramshot TAC | <<locked>> | 86% | 44,991 psi | 72% | 2359 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,853 psi | 57% | 2231 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,161 psi | 64% | 2260 fps | 96.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,498 psi | 41% | 1342 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,524 psi | 67% | 2297 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 50,125 psi | 80% | 2448 fps | 95.7% |
| ReloadSwiss RS 52 | 45.2 gr | 84% | 36,390 psi | 58% | 2310 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,616 psi | 46% | 2139 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 38,043 psi | 61% | 2218 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 32,764 psi | 53% | 2126 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 31,966 psi | 51% | 2172 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 50,256 psi | 81% | 2431 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 43,859 psi | 70% | 2352 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,054 psi | 53% | 2188 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 30,995 psi | 50% | 2110 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,874 psi | 70% | 2306 fps | 98.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,126 psi | 82% | 2116 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,485 psi | 75% | 2385 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,752 psi | 57% | 2264 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,382 psi | 71% | 2310 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 42,511 psi | 68% | 2326 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,721 psi | 54% | 2175 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,390 psi | 58% | 2149 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,675 psi | 48% | 2031 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 39,436 psi | 63% | 2287 fps | 98.4% |
| Somchem S335 | <<locked>> | 80% | 35,665 psi | 57% | 2152 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 34,432 psi | 55% | 2185 fps | 95.2% |
| Somchem S355 | <<locked>> | 86% | 33,272 psi | 53% | 2185 fps | 95.6% |
| Somchem S365 | <<locked>> | 94% | 30,603 psi | 49% | 2198 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 50,923 psi | 82% | 2293 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,365 psi | 66% | 2218 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,405 psi | 58% | 2156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,517 psi | 51% | 2129 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,518 psi | 52% | 2133 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 27,775 psi | 45% | 2041 fps | 95% |
| Vihtavuori N160 | <<locked>> | 98% | 40,988 psi | 66% | 2343 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 36,912 psi | 59% | 2215 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 31,082 psi | 50% | 2116 fps | 98% |
| Vihtavuori N550 | <<locked>> | 98% | 39,798 psi | 64% | 2346 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,751 psi | 56% | 2195 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 35,578 psi | 57% | 2247 fps | 98.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,721 psi | 52% | 2175 fps | 95.5% |
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 99 powders for .338 RCM loaded with the .338 | 225gr | Nosler AccuBond. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,615 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,615 fps. Accurate 4064 gives the best case fill at 100 %, and 99 of the 99 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 225.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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 | 225gr | Nosler AccuBond 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.