Load Specifications
Load data in caliber .338 RCM with .338 | 185gr | Fox Classic Hunter bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon CFE223, Alliant Power Pro 1200-R and Winchester 748.
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 1680 | <<locked>> | 84% | 55,317 psi | 89% | 2651 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 53,809 psi | 86% | 2707 fps | 100% |
| Accurate 2200 | <<locked>> | 88% | 55,941 psi | 90% | 2802 fps | 97.4% |
| Accurate 2230 | <<locked>> | 86% | 52,446 psi | 84% | 2753 fps | 97.2% |
| Accurate 2460 | <<locked>> | 94% | 56,130 psi | 90% | 2776 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 48,515 psi | 78% | 2700 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 53,388 psi | 86% | 2779 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 45,005 psi | 72% | 2677 fps | 99.6% |
| Accurate LT-30 | <<locked>> | 90% | 56,246 psi | 90% | 2674 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 53,505 psi | 86% | 2648 fps | 99.7% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 56,362 psi | 90% | 2822 fps | 98.3% |
| ADI AR 2207 | <<locked>> | 86% | 53,359 psi | 86% | 2657 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 47,601 psi | 76% | 2661 fps | 95.9% |
| ADI AR 2219 | <<locked>> | 90% | 55,521 psi | 89% | 2785 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 98% | 56,086 psi | 90% | 2789 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 98% | 54,099 psi | 87% | 2782 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 53,635 psi | 86% | 2841 fps | 98.5% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 53,011 psi | 85% | 2861 fps | 96.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 45,382 psi | 73% | 2674 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 92% | 54,331 psi | 87% | 2730 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 49,864 psi | 80% | 2743 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 86% | 54,578 psi | 88% | 2671 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 54,897 psi | 88% | 2671 fps | 100% |
| Baschieri & Pellagri 107ᴾ | <<locked>> | 100% | 56,376 psi | 90% | 2835 fps | 97.2% |
| Bofors RP3ᴾ | <<locked>> | 100% | 44,976 psi | 72% | 2680 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 96% | 55,854 psi | 90% | 2740 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 98% | 54,186 psi | 87% | 2815 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 96% | 56,405 psi | 90% | 2900 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 92% | 53,534 psi | 86% | 2759 fps | 100% |
| Hodgdon H335 | <<locked>> | 92% | 54,940 psi | 88% | 2785 fps | 100% |
| Hodgdon H4198 | <<locked>> | 86% | 54,911 psi | 88% | 2674 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 53,200 psi | 85% | 2782 fps | 98.3% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 51,300 psi | 82% | 2802 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,982 psi | 53% | 1627 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 55,201 psi | 89% | 2789 fps | 98.5% |
| IMR 3031ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2831 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 50,082 psi | 80% | 2694 fps | 96.7% |
| IMR 4198 | <<locked>> | 92% | 55,680 psi | 89% | 2697 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 54,795 psi | 88% | 2615 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 51,010 psi | 82% | 2779 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 98% | 56,086 psi | 90% | 2789 fps | 99.1% |
| Lovex D073.4 | <<locked>> | 86% | 53,069 psi | 85% | 2743 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 94% | 56,420 psi | 90% | 2785 fps | 99.6% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2805 fps | 99.8% |
| Lovex S053 | <<locked>> | 82% | 53,461 psi | 86% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 54,418 psi | 87% | 2713 fps | 98% |
| Lovex S062ᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2697 fps | 98.3% |
| Norma 200 | <<locked>> | 88% | 54,201 psi | 87% | 2703 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 54,665 psi | 88% | 2769 fps | 99% |
| Norma 202ᴾ | <<locked>> | 100% | 54,940 psi | 88% | 2785 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 48,863 psi | 78% | 2733 fps | 97.1% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 49,821 psi | 80% | 2759 fps | 96.9% |
| Ramshot Wild Boar | <<locked>> | 98% | 55,912 psi | 90% | 2822 fps | 98.2% |
| Ramshot X-Terminator | <<locked>> | 94% | 54,911 psi | 88% | 2746 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,127 psi | 53% | 1667 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 55,172 psi | 88% | 2654 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 53,084 psi | 85% | 2740 fps | 99.6% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 52,692 psi | 84% | 2858 fps | 97.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 43,700 psi | 70% | 2717 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 98% | 55,666 psi | 89% | 2766 fps | 99.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2717 fps | 98.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 41,611 psi | 67% | 2612 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 86% | 53,069 psi | 85% | 2743 fps | 99.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 54,491 psi | 87% | 2805 fps | 99.8% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 48,907 psi | 78% | 2697 fps | 98.3% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 53,650 psi | 86% | 2710 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 54,056 psi | 87% | 2415 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 55,724 psi | 89% | 2792 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 44,672 psi | 72% | 2677 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 55,622 psi | 89% | 2746 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 98% | 54,824 psi | 88% | 2766 fps | 96% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 54,955 psi | 88% | 2795 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 54,998 psi | 88% | 2694 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 47,282 psi | 76% | 2592 fps | 99.9% |
| Somchem S321 | <<locked>> | 94% | 53,896 psi | 86% | 2779 fps | 99.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 56,318 psi | 90% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 54,186 psi | 87% | 2766 fps | 97.8% |
| Somchem S355ᴾ | <<locked>> | 100% | 43,105 psi | 69% | 2621 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 86% | 53,359 psi | 86% | 2608 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 54,636 psi | 88% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 54,404 psi | 87% | 2684 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 49,806 psi | 80% | 2703 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 52,083 psi | 84% | 2717 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 41,553 psi | 67% | 2566 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 96% | 53,447 psi | 86% | 2743 fps | 98.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2713 fps | 99.7% |
| Winchester 748 | <<locked>> | 98% | 55,143 psi | 88% | 2835 fps | 99.6% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2805 fps | 98.5% |
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 1680 | <<locked>> | 80% | 48,617 psi | 78% | 2559 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 32,285 psi | 52% | 2343 fps | 99% |
| Accurate 2200 | <<locked>> | 82% | 45,803 psi | 73% | 2635 fps | 95.3% |
| Accurate 2230 | <<locked>> | 82% | 45,208 psi | 72% | 2631 fps | 95.7% |
| Accurate 2460 | <<locked>> | 80% | 34,722 psi | 56% | 2418 fps | 97.2% |
| Accurate 2495 | <<locked>> | 80% | 24,511 psi | 39% | 2215 fps | 96.9% |
| Accurate 2520 | <<locked>> | 80% | 30,356 psi | 49% | 2356 fps | 95.1% |
| Accurate 4064 | <<locked>> | 86% | 28,326 psi | 45% | 2329 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 41,379 psi | 66% | 2448 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 80% | 41,771 psi | 67% | 2457 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 90% | 41,046 psi | 66% | 2566 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 44,382 psi | 71% | 2530 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 44,860 psi | 72% | 2612 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 39,320 psi | 63% | 2530 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 36,129 psi | 58% | 2441 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 29,704 psi | 48% | 2362 fps | 99.9% |
| Alliant Power Pro 1200-R | 44.4 gr | 82% | 38,435 psi | 62% | 2566 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 49,400 psi | 79% | 2799 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 37,391 psi | 60% | 2523 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,391 psi | 60% | 2457 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 43,976 psi | 71% | 2644 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 45,397 psi | 73% | 2539 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,769 psi | 64% | 2438 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 46,006 psi | 74% | 2671 fps | 95% |
| Bofors RP3 | <<locked>> | 94% | 36,492 psi | 59% | 2520 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 34,026 psi | 55% | 2349 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 86% | 35,694 psi | 57% | 2493 fps | 95.8% |
| Hodgdon CFE223 | 53.1 gr | 90% | 45,890 psi | 74% | 2730 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 36,042 psi | 58% | 2464 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 80% | 36,405 psi | 58% | 2474 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 80% | 45,672 psi | 73% | 2536 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 88% | 38,638 psi | 62% | 2530 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 39,421 psi | 63% | 2589 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,381 psi | 39% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 40,321 psi | 65% | 2539 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 28,268 psi | 45% | 2333 fps | 97.1% |
| IMR 4064 | <<locked>> | 96% | 44,121 psi | 71% | 2595 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 38,798 psi | 62% | 2441 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 51,517 psi | 83% | 2572 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 42,134 psi | 68% | 2625 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 84% | 36,129 psi | 58% | 2441 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 42,714 psi | 68% | 2579 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 34,548 psi | 55% | 2415 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 84% | 31,038 psi | 50% | 2385 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 50,386 psi | 81% | 2520 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 42,714 psi | 68% | 2523 fps | 95.5% |
| Lovex S062 | <<locked>> | 90% | 35,636 psi | 57% | 2451 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 42,134 psi | 68% | 2526 fps | 100% |
| Norma 201 | <<locked>> | 88% | 37,492 psi | 60% | 2474 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 28,834 psi | 46% | 2297 fps | 95.3% |
| Norma 203B | <<locked>> | 94% | 40,321 psi | 65% | 2582 fps | 95% |
| Ramshot Big Game | <<locked>> | 96% | 43,308 psi | 69% | 2644 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 42,409 psi | 68% | 2602 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 42,293 psi | 68% | 2539 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,395 psi | 39% | 1490 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 51,677 psi | 83% | 2608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 35,592 psi | 57% | 2431 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 46,064 psi | 74% | 2746 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 35,882 psi | 58% | 2543 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 32,111 psi | 51% | 2339 fps | 96.3% |
| Rottweil R 902 | <<locked>> | 90% | 37,884 psi | 61% | 2474 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 98% | 39,059 psi | 63% | 2562 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 42,714 psi | 68% | 2579 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 31,038 psi | 50% | 2385 fps | 95.4% |
| Shooters World Precision | <<locked>> | 90% | 35,636 psi | 57% | 2451 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 37,826 psi | 61% | 2441 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 46,050 psi | 74% | 2313 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,929 psi | 64% | 2536 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 41,916 psi | 67% | 2625 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,884 psi | 61% | 2464 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 50,937 psi | 82% | 2707 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 42,250 psi | 68% | 2585 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,038 psi | 50% | 2270 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 26,774 psi | 43% | 2182 fps | 95.5% |
| Somchem S321 | <<locked>> | 82% | 35,882 psi | 58% | 2461 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 30,472 psi | 49% | 2277 fps | 96.8% |
| Somchem S341 | <<locked>> | 92% | 43,990 psi | 71% | 2605 fps | 95.7% |
| Somchem S355 | <<locked>> | 98% | 40,567 psi | 65% | 2575 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 44,454 psi | 71% | 2487 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 35,462 psi | 57% | 2369 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 30,908 psi | 50% | 2283 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 25,802 psi | 41% | 2231 fps | 97.2% |
| Vihtavuori N140 | <<locked>> | 82% | 29,138 psi | 47% | 2287 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 94% | 34,142 psi | 55% | 2418 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 35,926 psi | 58% | 2434 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 84% | 29,878 psi | 48% | 2320 fps | 95.5% |
| Winchester 748 | 47.6 gr | 84% | 34,403 psi | 55% | 2461 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 38,711 psi | 62% | 2539 fps | 95.1% |
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 88 powders for .338 RCM loaded with the .338 | 185gr | Fox Classic Hunter. Hodgdon CFE223 delivers the highest muzzle velocity at 2,900 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,900 fps. Accurate 2495 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2206H 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. Hodgdon CFE223, Alliant Power Pro 1200-R, Winchester 748 rank at the top here: for .338 RCM with the .338 | 185gr | Fox Classic Hunter 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.