Load Specifications
Load data in caliber .338 RCM with .338 | 175gr | Hammer Hunter bullet and 87 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% | 56,405 psi | 90% | 2753 fps | 100% |
| Accurate 2015 | <<locked>> | 96% | 55,288 psi | 89% | 2815 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 53,229 psi | 85% | 2848 fps | 96.7% |
| Accurate 2230 | <<locked>> | 86% | 53,722 psi | 86% | 2858 fps | 97.1% |
| Accurate 2460 | <<locked>> | 92% | 54,099 psi | 87% | 2838 fps | 99.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2815 fps | 100% |
| Accurate 2520 | <<locked>> | 96% | 54,882 psi | 88% | 2887 fps | 99.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 47,036 psi | 75% | 2792 fps | 99.7% |
| Accurate LT-30 | <<locked>> | 88% | 53,925 psi | 86% | 2733 fps | 100% |
| Accurate LT-32 | <<locked>> | 88% | 54,375 psi | 87% | 2749 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 98% | 54,288 psi | 87% | 2881 fps | 97.8% |
| ADI AR 2207 | <<locked>> | 86% | 54,476 psi | 87% | 2762 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 48,646 psi | 78% | 2762 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 88% | 52,895 psi | 85% | 2841 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 96% | 53,867 psi | 86% | 2844 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 98% | 55,550 psi | 89% | 2894 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 54,955 psi | 88% | 2949 fps | 98.5% |
| Alliant Power Pro 2000-MRᴾ | <<locked>> | 100% | 54,070 psi | 87% | 2966 fps | 96.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 46,818 psi | 75% | 2782 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 92% | 55,434 psi | 89% | 2835 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 51,184 psi | 82% | 2851 fps | 96.7% |
| Alliant Reloder-7 | <<locked>> | 86% | 55,869 psi | 90% | 2776 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 55,912 psi | 90% | 2772 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 98% | 54,056 psi | 87% | 2887 fps | 96.5% |
| Bofors RP3ᴾ | <<locked>> | 100% | 46,470 psi | 75% | 2789 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 94% | 53,577 psi | 86% | 2792 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 98% | 55,637 psi | 89% | 2927 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 94% | 53,925 psi | 86% | 2953 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 92% | 54,766 psi | 88% | 2867 fps | 100% |
| Hodgdon H335 | <<locked>> | 92% | 56,043 psi | 90% | 2890 fps | 100% |
| Hodgdon H4198 | <<locked>> | 86% | 55,941 psi | 90% | 2782 fps | 100% |
| Hodgdon H4895 | <<locked>> | 98% | 54,708 psi | 88% | 2894 fps | 98.3% |
| Hodgdon LEVERevolutionᴾ | <<locked>> | 100% | 52,591 psi | 84% | 2910 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,460 psi | 54% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 53,069 psi | 85% | 2848 fps | 98% |
| IMR 3031ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2943 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 51,155 psi | 82% | 2795 fps | 96.6% |
| IMR 4198 | <<locked>> | 90% | 53,330 psi | 86% | 2759 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 55,738 psi | 89% | 2720 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2887 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 96% | 53,867 psi | 86% | 2844 fps | 98.7% |
| Lovex D073.4 | <<locked>> | 86% | 54,520 psi | 87% | 2851 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 92% | 54,215 psi | 87% | 2841 fps | 99.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2910 fps | 99.8% |
| Lovex S053 | <<locked>> | 82% | 54,331 psi | 87% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 98% | 55,608 psi | 89% | 2818 fps | 97.9% |
| Lovex S062ᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2802 fps | 98.3% |
| Norma 200 | <<locked>> | 88% | 55,622 psi | 89% | 2812 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 56,347 psi | 90% | 2881 fps | 99% |
| Norma 202 | <<locked>> | 98% | 53,055 psi | 85% | 2848 fps | 99.9% |
| Norma 203Bᴾ | <<locked>> | 100% | 50,212 psi | 81% | 2841 fps | 97.1% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 50,923 psi | 82% | 2861 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 96% | 53,476 psi | 86% | 2871 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 94% | 56,159 psi | 90% | 2851 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,359 psi | 53% | 1736 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 56,202 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 92% | 54,128 psi | 87% | 2844 fps | 99.5% |
| ReloadSwiss RS 52ᴾ | <<locked>> | 100% | 54,070 psi | 87% | 2966 fps | 97.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 44,904 psi | 72% | 2822 fps | 98.3% |
| Rottweil R 901 | <<locked>> | 96% | 53,911 psi | 86% | 2828 fps | 99.8% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 53,127 psi | 85% | 2825 fps | 98.6% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 43,149 psi | 69% | 2717 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 86% | 54,520 psi | 87% | 2851 fps | 99.6% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 55,825 psi | 90% | 2910 fps | 99.8% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 50,256 psi | 81% | 2802 fps | 98.3% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 54,926 psi | 88% | 2815 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 55,042 psi | 88% | 2513 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 88% | 53,374 psi | 86% | 2848 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 53,345 psi | 86% | 2805 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 98% | 56,231 psi | 90% | 2871 fps | 95.9% |
| SNPE Vectan SP 9ᴾ | <<locked>> | 100% | 56,260 psi | 90% | 2904 fps | 98% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 56,231 psi | 90% | 2799 fps | 99.9% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 48,283 psi | 77% | 2690 fps | 99.9% |
| Somchem S321 | <<locked>> | 94% | 55,477 psi | 89% | 2890 fps | 99.1% |
| Somchem S335 | <<locked>> | 98% | 54,563 psi | 87% | 2795 fps | 100% |
| Somchem S341 | <<locked>> | 98% | 55,376 psi | 89% | 2871 fps | 97.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2730 fps | 96.3% |
| Vihtavuori N120 | <<locked>> | 86% | 54,418 psi | 87% | 2710 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 55,825 psi | 90% | 2779 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 55,492 psi | 89% | 2789 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 50,995 psi | 82% | 2808 fps | 100% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 53,490 psi | 86% | 2825 fps | 99.9% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,960 psi | 69% | 2671 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 96% | 54,592 psi | 88% | 2844 fps | 98.8% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 51,576 psi | 83% | 2815 fps | 99.7% |
| Winchester 748 | <<locked>> | 96% | 52,837 psi | 85% | 2890 fps | 99.3% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 55,564 psi | 89% | 2910 fps | 98.4% |
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% | 49,676 psi | 80% | 2661 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 33,533 psi | 54% | 2441 fps | 99% |
| Accurate 2200 | <<locked>> | 82% | 46,615 psi | 75% | 2733 fps | 95.1% |
| Accurate 2230 | <<locked>> | 82% | 46,746 psi | 75% | 2743 fps | 95.7% |
| Accurate 2460 | <<locked>> | 80% | 36,158 psi | 58% | 2520 fps | 97.2% |
| Accurate 2495 | <<locked>> | 80% | 26,034 psi | 42% | 2320 fps | 97.1% |
| Accurate 2520 | <<locked>> | 80% | 31,430 psi | 50% | 2451 fps | 95.1% |
| Accurate 4064 | <<locked>> | 84% | 28,108 psi | 45% | 2388 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 42,235 psi | 68% | 2543 fps | 99.4% |
| Accurate LT-32 | <<locked>> | 80% | 42,598 psi | 68% | 2552 fps | 98.2% |
| ADI AR 2206H | <<locked>> | 90% | 42,177 psi | 68% | 2667 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 45,310 psi | 73% | 2628 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 45,788 psi | 73% | 2710 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 40,480 psi | 65% | 2631 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 37,231 psi | 60% | 2539 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 30,763 psi | 49% | 2461 fps | 99.9% |
| Alliant Power Pro 1200-R | 46.4 gr | 82% | 39,494 psi | 63% | 2667 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 50,546 psi | 81% | 2904 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 38,595 psi | 62% | 2625 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,392 psi | 62% | 2556 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 45,005 psi | 72% | 2743 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 46,485 psi | 75% | 2641 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,654 psi | 65% | 2533 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 47,427 psi | 76% | 2776 fps | 95% |
| Bofors RP3 | <<locked>> | 94% | 37,985 psi | 61% | 2625 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 35,114 psi | 56% | 2448 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,970 psi | 59% | 2595 fps | 95.8% |
| Hodgdon CFE223 | 55.5 gr | 90% | 46,905 psi | 75% | 2831 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 80% | 36,898 psi | 59% | 2559 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 80% | 37,434 psi | 60% | 2572 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 80% | 46,514 psi | 75% | 2635 fps | 99.6% |
| Hodgdon H4895 | <<locked>> | 88% | 39,827 psi | 64% | 2628 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 40,611 psi | 65% | 2690 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,772 psi | 40% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 41,321 psi | 66% | 2641 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 29,457 psi | 47% | 2434 fps | 97.2% |
| IMR 4064 | <<locked>> | 96% | 45,498 psi | 73% | 2700 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 39,711 psi | 64% | 2539 fps | 100% |
| IMR 4227 | <<locked>> | 80% | 52,315 psi | 84% | 2674 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 43,265 psi | 69% | 2726 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 84% | 37,231 psi | 60% | 2539 fps | 95% |
| Lovex D073.4 | <<locked>> | 80% | 43,976 psi | 71% | 2680 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 35,810 psi | 57% | 2513 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 84% | 32,460 psi | 52% | 2487 fps | 95.5% |
| Lovex S053 | <<locked>> | 80% | 51,401 psi | 82% | 2621 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 43,801 psi | 70% | 2621 fps | 95.5% |
| Lovex S062 | <<locked>> | 90% | 36,941 psi | 59% | 2552 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 43,482 psi | 70% | 2628 fps | 100% |
| Norma 201 | <<locked>> | 88% | 38,740 psi | 62% | 2575 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 29,834 psi | 48% | 2392 fps | 95.3% |
| Norma 203B | <<locked>> | 96% | 44,135 psi | 71% | 2733 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 96% | 44,614 psi | 72% | 2749 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 43,598 psi | 70% | 2703 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 43,482 psi | 70% | 2641 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,801 psi | 40% | 1552 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 52,852 psi | 85% | 2717 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,796 psi | 59% | 2533 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 47,108 psi | 76% | 2851 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 36,854 psi | 59% | 2641 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 33,576 psi | 54% | 2444 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 90% | 39,102 psi | 63% | 2575 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 98% | 40,422 psi | 65% | 2664 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 43,976 psi | 71% | 2680 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 32,460 psi | 52% | 2487 fps | 95.5% |
| Shooters World Precision | <<locked>> | 90% | 36,941 psi | 59% | 2552 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 38,856 psi | 62% | 2536 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 47,050 psi | 75% | 2408 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 40,944 psi | 66% | 2635 fps | 98.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,943 psi | 62% | 2562 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 96% | 52,431 psi | 84% | 2815 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 43,511 psi | 70% | 2690 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,126 psi | 52% | 2365 fps | 96.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 27,702 psi | 44% | 2274 fps | 95.5% |
| Somchem S321 | <<locked>> | 82% | 37,057 psi | 59% | 2562 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 31,531 psi | 51% | 2372 fps | 96.9% |
| Somchem S341 | <<locked>> | 92% | 44,976 psi | 72% | 2703 fps | 95.6% |
| Somchem S355 | <<locked>> | 98% | 41,916 psi | 67% | 2677 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 45,368 psi | 73% | 2585 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 36,579 psi | 59% | 2467 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 80% | 31,952 psi | 51% | 2379 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 80% | 26,963 psi | 43% | 2329 fps | 97.3% |
| Vihtavuori N140 | <<locked>> | 80% | 28,340 psi | 45% | 2333 fps | 95% |
| Vihtavuori N150 | <<locked>> | 94% | 35,302 psi | 57% | 2516 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 84% | 36,999 psi | 59% | 2533 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 84% | 30,922 psi | 50% | 2415 fps | 95.5% |
| Winchester 748 | 49.8 gr | 84% | 35,476 psi | 57% | 2562 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 39,711 psi | 64% | 2638 fps | 95% |
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 96 powders for .338 RCM loaded with the .338 | 175gr | Hammer Hunter. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,966 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,966 fps. Accurate 2495 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2700, Accurate 4064 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 | 175gr | Hammer Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-17, Hodgdon H380 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.