Load Specifications
Bullet Manufacturer:Hornady
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 | Hornady InterBond bullet and 101 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% | 53,548 psi | 86% | 2434 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 53,693 psi | 86% | 2513 fps | 98.9% |
| Accurate 2230 | <<locked>> | 82% | 54,534 psi | 87% | 2526 fps | 99.2% |
| Accurate 2460 | <<locked>> | 88% | 55,259 psi | 89% | 2497 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,214 psi | 85% | 2484 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,055 psi | 85% | 2510 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2559 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 41,785 psi | 67% | 2421 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 84% | 53,954 psi | 87% | 2388 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,346 psi | 87% | 2408 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 55,666 psi | 89% | 2556 fps | 99.6% |
| ADI AR 2207 | <<locked>> | 82% | 55,288 psi | 89% | 2402 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2546 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 53,882 psi | 86% | 2493 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,042 psi | 88% | 2516 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 54,331 psi | 87% | 2497 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,084 psi | 85% | 2562 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 54,955 psi | 88% | 2654 fps | 99.2% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 55,216 psi | 89% | 2566 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,476 psi | 86% | 2441 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 56,275 psi | 90% | 2585 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 42,830 psi | 69% | 2431 fps | 96.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,979 psi | 79% | 2569 fps | 99.3% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,144 psi | 90% | 2418 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 56,086 psi | 90% | 2428 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 55,187 psi | 88% | 2569 fps | 98.9% |
| Bofors RP3ᴾ | <<locked>> | 100% | 55,738 psi | 89% | 2582 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,143 psi | 87% | 2461 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 53,461 psi | 86% | 2546 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 55,376 psi | 89% | 2628 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 88% | 55,854 psi | 90% | 2516 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 53,548 psi | 86% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,056 psi | 87% | 2546 fps | 98.3% |
| Hodgdon H4198 | <<locked>> | 82% | 56,014 psi | 90% | 2428 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,101 psi | 90% | 2566 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,117 psi | 63% | 2333 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 54,462 psi | 87% | 2595 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,330 psi | 55% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 54,128 psi | 87% | 2523 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 54,998 psi | 88% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,999 psi | 90% | 2533 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,838 psi | 86% | 2470 fps | 95.9% |
| IMR 4198 | <<locked>> | 86% | 54,259 psi | 87% | 2405 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,480 psi | 65% | 2379 fps | 96.2% |
| IMR 4895 | <<locked>> | 96% | 54,447 psi | 87% | 2572 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 92% | 55,042 psi | 88% | 2516 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 55,245 psi | 89% | 2507 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,245 psi | 89% | 2510 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 54,302 psi | 87% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 56,072 psi | 90% | 2490 fps | 99.6% |
| Lovex S062 | <<locked>> | 98% | 55,129 psi | 88% | 2530 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 47,703 psi | 76% | 2425 fps | 96.2% |
| Norma 200 | <<locked>> | 82% | 53,403 psi | 86% | 2415 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,331 psi | 87% | 2507 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 54,679 psi | 88% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 98% | 55,347 psi | 89% | 2575 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 42,438 psi | 68% | 2421 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 98% | 56,086 psi | 90% | 2602 fps | 99.6% |
| Ramshot TAC | <<locked>> | 92% | 55,854 psi | 90% | 2533 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 92% | 54,621 psi | 88% | 2549 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,316 psi | 85% | 2477 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,708 psi | 56% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,027 psi | 88% | 2507 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 54,694 psi | 88% | 2523 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 56,086 psi | 90% | 2644 fps | 99.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 52,373 psi | 84% | 2628 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,032 psi | 67% | 2441 fps | 96% |
| Rottweil R 901 | <<locked>> | 92% | 55,593 psi | 89% | 2497 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 54,563 psi | 87% | 2500 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2523 fps | 99.6% |
| Shooters World AR Plus | <<locked>> | 82% | 55,245 psi | 89% | 2507 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 47,703 psi | 76% | 2425 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 94% | 54,302 psi | 87% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,129 psi | 88% | 2530 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,114 psi | 88% | 2480 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 54,781 psi | 88% | 2165 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,157 psi | 87% | 2503 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,635 psi | 86% | 2579 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 54,447 psi | 87% | 2457 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 53,519 psi | 86% | 2507 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 53,896 psi | 86% | 2530 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 53,417 psi | 86% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 56,101 psi | 90% | 2454 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 56,376 psi | 90% | 2552 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 55,637 psi | 89% | 2457 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,055 psi | 85% | 2503 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 52,489 psi | 84% | 2520 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 37,797 psi | 61% | 2375 fps | 98.5% |
| Vihtavuori N120 | <<locked>> | 82% | 55,129 psi | 88% | 2352 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 53,476 psi | 86% | 2392 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 53,214 psi | 85% | 2408 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,519 psi | 86% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,027 psi | 88% | 2493 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 50,734 psi | 81% | 2464 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 44,889 psi | 72% | 2425 fps | 96.9% |
| Vihtavuori N530 | <<locked>> | 92% | 55,912 psi | 90% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 53,258 psi | 85% | 2493 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 43,859 psi | 70% | 2431 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2418 fps | 98.9% |
| Winchester 748 | <<locked>> | 92% | 54,462 psi | 87% | 2559 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 53,345 psi | 86% | 2536 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% | 39,175 psi | 63% | 2231 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,531 psi | 81% | 2467 fps | 98.5% |
| Accurate 2230 | <<locked>> | 80% | 50,763 psi | 81% | 2474 fps | 98.8% |
| Accurate 2460 | <<locked>> | 80% | 42,308 psi | 68% | 2320 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 31,807 psi | 51% | 2156 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 37,637 psi | 60% | 2274 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 30,081 psi | 48% | 2136 fps | 98.5% |
| Accurate 4350 | <<locked>> | 98% | 38,856 psi | 62% | 2372 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 47,688 psi | 76% | 2306 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,080 psi | 77% | 2323 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,013 psi | 58% | 2234 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 80% | 52,083 psi | 84% | 2362 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 37,043 psi | 59% | 2238 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 47,195 psi | 76% | 2405 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,985 psi | 61% | 2247 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 36,579 psi | 59% | 2254 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,656 psi | 70% | 2418 fps | 98.7% |
| Alliant Power Pro 2000-MR | 49 gr | 86% | 39,436 psi | 63% | 2388 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,531 psi | 51% | 2165 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,686 psi | 72% | 2323 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,303 psi | 58% | 2260 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 37,985 psi | 61% | 2336 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,272 psi | 53% | 2264 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 52,939 psi | 85% | 2379 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,543 psi | 75% | 2306 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,159 psi | 60% | 2277 fps | 95.2% |
| Bofors RP3 | <<locked>> | 82% | 30,734 psi | 49% | 2162 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,263 psi | 65% | 2251 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 35,766 psi | 57% | 2260 fps | 98% |
| Hodgdon CFE223 | <<locked>> | 80% | 39,378 psi | 63% | 2372 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 43,279 psi | 69% | 2346 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 43,642 psi | 70% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 41,539 psi | 67% | 2352 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 52,489 psi | 84% | 2385 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,201 psi | 58% | 2244 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,576 psi | 52% | 2198 fps | 95.1% |
| Hodgdon LEVERevolution | 44.7 gr | 80% | 32,242 psi | 52% | 2205 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,469 psi | 41% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,027 psi | 56% | 2205 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 34,983 psi | 56% | 2254 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,287 psi | 55% | 2175 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,531 psi | 81% | 2421 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 45,513 psi | 73% | 2293 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 37,913 psi | 61% | 2333 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 32,706 psi | 52% | 2195 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 37,985 psi | 61% | 2247 fps | 97.9% |
| Lovex D073.4 | <<locked>> | 80% | 51,648 psi | 83% | 2461 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,119 psi | 68% | 2323 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 34,040 psi | 55% | 2218 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 36,956 psi | 59% | 2188 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 31,705 psi | 51% | 2136 fps | 96.3% |
| Lovex S065 | <<locked>> | 98% | 45,034 psi | 72% | 2385 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 50,372 psi | 81% | 2375 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,404 psi | 57% | 2198 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 35,259 psi | 57% | 2211 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 33,533 psi | 54% | 2208 fps | 95.4% |
| Norma URP | <<locked>> | 98% | 40,030 psi | 64% | 2379 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 84% | 35,331 psi | 57% | 2260 fps | 95.6% |
| Ramshot TAC | <<locked>> | 84% | 43,192 psi | 69% | 2339 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,666 psi | 59% | 2257 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,205 psi | 66% | 2290 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,701 psi | 41% | 1355 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,511 psi | 68% | 2326 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,153 psi | 77% | 2431 fps | 95.5% |
| ReloadSwiss RS 52 | 45.3 gr | 82% | 35,070 psi | 56% | 2293 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 27,485 psi | 44% | 2119 fps | 95% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,189 psi | 63% | 2388 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 39,102 psi | 63% | 2247 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 33,707 psi | 54% | 2159 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 84% | 30,879 psi | 50% | 2159 fps | 95.3% |
| Shooters World AR Plus | <<locked>> | 80% | 51,648 psi | 83% | 2461 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 45,034 psi | 72% | 2385 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,040 psi | 55% | 2218 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 31,705 psi | 51% | 2136 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,078 psi | 72% | 2339 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,967 psi | 83% | 2136 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,456 psi | 76% | 2411 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,374 psi | 55% | 2247 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,324 psi | 73% | 2336 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 40,799 psi | 65% | 2310 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,577 psi | 55% | 2205 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,159 psi | 60% | 2172 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,371 psi | 49% | 2057 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 40,567 psi | 65% | 2320 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 36,593 psi | 59% | 2178 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 35,404 psi | 57% | 2215 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 32,126 psi | 52% | 2169 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 29,602 psi | 47% | 2185 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 51,938 psi | 83% | 2316 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,221 psi | 68% | 2241 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,188 psi | 60% | 2178 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,387 psi | 52% | 2156 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,214 psi | 53% | 2156 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 28,543 psi | 46% | 2070 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 96% | 39,624 psi | 64% | 2333 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 37,855 psi | 61% | 2244 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 31,894 psi | 51% | 2142 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 38,522 psi | 62% | 2336 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,446 psi | 54% | 2178 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 36,492 psi | 59% | 2277 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,518 psi | 54% | 2205 fps | 96% |
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 101 powders for .338 RCM loaded with the .338 | 225gr | Hornady InterBond. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,654 fps; across all powders the maximum-charge window runs from 1,480 fps to 2,654 fps. Accurate 4064 gives the best case fill at 100 %, and 101 of the 101 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 LEVERevolution rank at the top here: for .338 RCM with the .338 | 225gr | Hornady InterBond 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.