Load Specifications
Bullet Manufacturer:Frontier Bullets
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:1:12.5
Load data in caliber .338 RCM with .338 | 225gr | Frontier PH HPBT 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, Hodgdon CFE223 and ReloadSwiss RS 52.
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% | 55,709 psi | 89% | 2451 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 56,144 psi | 90% | 2536 fps | 99.1% |
| Accurate 2230 | <<locked>> | 82% | 53,476 psi | 86% | 2503 fps | 99% |
| Accurate 2460 | <<locked>> | 88% | 54,244 psi | 87% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,608 psi | 89% | 2503 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,390 psi | 89% | 2530 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2536 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 40,669 psi | 65% | 2395 fps | 96.1% |
| Accurate LT-30 | <<locked>> | 86% | 56,420 psi | 90% | 2408 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 53,563 psi | 86% | 2388 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,433 psi | 87% | 2530 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 82% | 54,215 psi | 87% | 2382 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,245 psi | 89% | 2520 fps | 99% |
| ADI AR 2219 | <<locked>> | 84% | 52,750 psi | 85% | 2470 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 54,099 psi | 87% | 2493 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 53,084 psi | 85% | 2477 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,492 psi | 89% | 2589 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,664 psi | 86% | 2621 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2539 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,854 psi | 90% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,143 psi | 88% | 2562 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 41,916 psi | 67% | 2402 fps | 96.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,834 psi | 77% | 2539 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 55,172 psi | 88% | 2398 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 54,940 psi | 88% | 2405 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 54,186 psi | 87% | 2546 fps | 98.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2552 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,362 psi | 90% | 2480 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 55,854 psi | 90% | 2566 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 54,215 psi | 87% | 2602 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 88% | 54,752 psi | 88% | 2497 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 55,825 psi | 90% | 2523 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2562 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 82% | 54,810 psi | 88% | 2405 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 54,868 psi | 88% | 2539 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 38,000 psi | 61% | 2303 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,040 psi | 85% | 2566 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,171 psi | 55% | 1470 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 53,258 psi | 85% | 2500 fps | 99.5% |
| IMR 3031 | <<locked>> | 94% | 53,824 psi | 86% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 54,810 psi | 88% | 2507 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 96% | 55,985 psi | 90% | 2487 fps | 96.1% |
| IMR 4198 | <<locked>> | 88% | 56,260 psi | 90% | 2421 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 56,434 psi | 90% | 2589 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 92% | 54,099 psi | 87% | 2493 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 54,041 psi | 87% | 2484 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 53,998 psi | 87% | 2484 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 53,011 psi | 85% | 2510 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 55,245 psi | 89% | 2470 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 53,911 psi | 86% | 2507 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 46,717 psi | 75% | 2402 fps | 95.8% |
| Norma 200 | <<locked>> | 84% | 55,666 psi | 89% | 2434 fps | 100% |
| Norma 201 | <<locked>> | 94% | 53,084 psi | 85% | 2480 fps | 99.8% |
| Norma 202 | <<locked>> | 94% | 53,374 psi | 86% | 2490 fps | 100% |
| Norma 203B | <<locked>> | 98% | 54,128 psi | 87% | 2549 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 41,539 psi | 67% | 2395 fps | 96% |
| Ramshot Big Game | <<locked>> | 98% | 54,766 psi | 88% | 2575 fps | 99.4% |
| Ramshot TAC | <<locked>> | 92% | 54,592 psi | 88% | 2503 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,490 psi | 86% | 2523 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,622 psi | 89% | 2497 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,563 psi | 55% | 1506 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 54,012 psi | 87% | 2484 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,708 psi | 86% | 2500 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 54,766 psi | 88% | 2618 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,155 psi | 82% | 2602 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 54,534 psi | 87% | 2474 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,621 psi | 86% | 2480 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,473 psi | 81% | 2497 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 82% | 54,041 psi | 87% | 2484 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 46,717 psi | 75% | 2402 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 94% | 53,011 psi | 85% | 2510 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 53,911 psi | 86% | 2507 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 54,215 psi | 87% | 2457 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 53,983 psi | 87% | 2149 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 53,200 psi | 85% | 2484 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2552 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 53,519 psi | 86% | 2438 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 56,130 psi | 90% | 2530 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 56,275 psi | 90% | 2549 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 55,724 psi | 89% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,882 psi | 88% | 2431 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 55,201 psi | 89% | 2530 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 54,433 psi | 87% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,506 psi | 89% | 2526 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,343 psi | 82% | 2497 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,941 psi | 59% | 2349 fps | 98.1% |
| Vihtavuori N120 | <<locked>> | 82% | 54,143 psi | 87% | 2333 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,869 psi | 90% | 2411 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,419 psi | 89% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,419 psi | 89% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 53,809 psi | 86% | 2470 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,632 psi | 80% | 2441 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 43,961 psi | 70% | 2398 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 92% | 54,607 psi | 88% | 2493 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 55,303 psi | 89% | 2510 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 42,670 psi | 68% | 2402 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,136 psi | 72% | 2388 fps | 98.5% |
| Winchester 748 | <<locked>> | 92% | 53,229 psi | 85% | 2533 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 55,825 psi | 90% | 2559 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% | 38,566 psi | 62% | 2215 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,385 psi | 79% | 2441 fps | 98.2% |
| Accurate 2230 | <<locked>> | 80% | 49,647 psi | 80% | 2448 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 41,568 psi | 67% | 2300 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 30,922 psi | 50% | 2133 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,869 psi | 59% | 2254 fps | 99% |
| Accurate 4064 | <<locked>> | 80% | 29,298 psi | 47% | 2113 fps | 98.2% |
| Accurate 4350 | <<locked>> | 98% | 37,797 psi | 61% | 2343 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 46,862 psi | 75% | 2283 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,239 psi | 76% | 2300 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 35,317 psi | 57% | 2211 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 80% | 51,329 psi | 82% | 2346 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 36,216 psi | 58% | 2215 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 46,035 psi | 74% | 2382 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 37,246 psi | 60% | 2228 fps | 97.6% |
| Alliant AR-Comp | <<locked>> | 80% | 35,665 psi | 57% | 2234 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,743 psi | 69% | 2395 fps | 98.4% |
| Alliant Power Pro 2000-MR | 48 gr | 86% | 38,711 psi | 62% | 2362 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,676 psi | 49% | 2139 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,714 psi | 70% | 2300 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 35,607 psi | 57% | 2238 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 98% | 39,566 psi | 63% | 2356 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,606 psi | 55% | 2283 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,982 psi | 83% | 2359 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,672 psi | 73% | 2287 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 38,827 psi | 62% | 2300 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 29,878 psi | 48% | 2136 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,349 psi | 63% | 2224 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,911 psi | 56% | 2234 fps | 97.7% |
| Hodgdon CFE223 | 45.7 gr | 80% | 38,522 psi | 62% | 2343 fps | 96.1% |
| Hodgdon H322 | <<locked>> | 80% | 42,221 psi | 68% | 2323 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 42,714 psi | 68% | 2339 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 40,466 psi | 65% | 2326 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 51,605 psi | 83% | 2362 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,491 psi | 57% | 2221 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,692 psi | 54% | 2211 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,502 psi | 51% | 2178 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,396 psi | 41% | 1312 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,156 psi | 55% | 2178 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 34,171 psi | 55% | 2231 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 35,737 psi | 57% | 2198 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 94% | 52,794 psi | 85% | 2444 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 44,788 psi | 72% | 2274 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,055 psi | 55% | 2218 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 37,246 psi | 60% | 2228 fps | 97.6% |
| Lovex D073.4 | <<locked>> | 80% | 50,488 psi | 81% | 2438 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 41,162 psi | 66% | 2297 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 33,301 psi | 53% | 2195 fps | 98.3% |
| Lovex S060 | <<locked>> | 80% | 36,274 psi | 58% | 2165 fps | 96% |
| Lovex S062 | <<locked>> | 80% | 30,995 psi | 50% | 2113 fps | 95.8% |
| Lovex S065 | <<locked>> | 98% | 44,048 psi | 71% | 2359 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 49,414 psi | 79% | 2356 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,679 psi | 56% | 2175 fps | 97% |
| Norma 202 | <<locked>> | 80% | 34,505 psi | 55% | 2192 fps | 99% |
| Norma 203B | <<locked>> | 84% | 34,940 psi | 56% | 2231 fps | 95.7% |
| Norma URP | <<locked>> | 98% | 38,870 psi | 62% | 2346 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 34,418 psi | 55% | 2234 fps | 95% |
| Ramshot TAC | <<locked>> | 86% | 44,918 psi | 72% | 2359 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 35,824 psi | 57% | 2234 fps | 95.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,350 psi | 65% | 2264 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,614 psi | 41% | 1345 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,756 psi | 67% | 2303 fps | 99.4% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 47,166 psi | 76% | 2405 fps | 95% |
| ReloadSwiss RS 52 | 45.4 gr | 84% | 36,637 psi | 59% | 2320 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 28,631 psi | 46% | 2142 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 38,276 psi | 61% | 2224 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 32,967 psi | 53% | 2133 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 86% | 31,966 psi | 51% | 2175 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 50,488 psi | 81% | 2438 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 44,048 psi | 71% | 2359 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,301 psi | 53% | 2195 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 30,995 psi | 50% | 2113 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,150 psi | 71% | 2316 fps | 98.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,445 psi | 82% | 2119 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,456 psi | 74% | 2388 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,911 psi | 58% | 2270 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,382 psi | 71% | 2313 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 42,743 psi | 69% | 2333 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,707 psi | 54% | 2178 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,390 psi | 58% | 2152 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,689 psi | 48% | 2034 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 39,653 psi | 64% | 2293 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 35,882 psi | 58% | 2159 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 34,650 psi | 56% | 2192 fps | 95.3% |
| Somchem S355 | <<locked>> | 86% | 33,243 psi | 53% | 2185 fps | 95.7% |
| Somchem S365 | <<locked>> | 94% | 30,589 psi | 49% | 2201 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 51,271 psi | 82% | 2300 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,379 psi | 66% | 2221 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,376 psi | 58% | 2156 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 31,531 psi | 51% | 2133 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,518 psi | 52% | 2136 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 27,920 psi | 45% | 2047 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 98% | 41,162 psi | 66% | 2349 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 36,898 psi | 59% | 2218 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 31,285 psi | 50% | 2123 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 98% | 39,972 psi | 64% | 2352 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,882 psi | 56% | 2201 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 35,621 psi | 57% | 2251 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,909 psi | 53% | 2182 fps | 95.6% |
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 | Frontier PH HPBT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,621 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 1:12.5 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .338 RCM with the .338 | 225gr | Frontier PH HPBT 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.