Load Specifications
Load data in caliber .338 Weatherby RPM with .338 | 185gr | Hornady CX bullet and 92 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 1680 | <<locked>> | 82% | 57,827 psi | 89% | 2743 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 57,856 psi | 89% | 2818 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 55,187 psi | 85% | 2864 fps | 98.2% |
| Accurate 2230 | <<locked>> | 84% | 55,999 psi | 86% | 2877 fps | 98.6% |
| Accurate 2460 | <<locked>> | 90% | 56,391 psi | 87% | 2841 fps | 100% |
| Accurate 2495ᴾ | <<locked>> | 100% | 57,667 psi | 89% | 2867 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 58,102 psi | 89% | 2904 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,432 psi | 82% | 2858 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 55,347 psi | 85% | 2730 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 55,825 psi | 86% | 2753 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 58,508 psi | 90% | 2129 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 57,058 psi | 88% | 2904 fps | 99.1% |
| ADI AR 2207 | <<locked>> | 84% | 56,362 psi | 87% | 2749 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 54,360 psi | 84% | 2838 fps | 98.2% |
| ADI AR 2219 | <<locked>> | 86% | 55,390 psi | 85% | 2848 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 56,405 psi | 87% | 2861 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 94% | 55,434 psi | 85% | 2848 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 57,754 psi | 89% | 2969 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 56,840 psi | 87% | 3009 fps | 98.5% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,953 psi | 81% | 2858 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 90% | 57,928 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 57,928 psi | 89% | 2936 fps | 98.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,166 psi | 73% | 2848 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 84% | 57,406 psi | 88% | 2766 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 58,030 psi | 89% | 2772 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 57,000 psi | 88% | 2913 fps | 98.3% |
| Bofors RP3ᴾ | <<locked>> | 100% | 53,113 psi | 82% | 2871 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 92% | 55,492 psi | 85% | 2805 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 94% | 54,853 psi | 84% | 2887 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 92% | 56,956 psi | 88% | 2982 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 90% | 57,508 psi | 88% | 2874 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 54,795 psi | 84% | 2848 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 55,317 psi | 85% | 2881 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 84% | 57,406 psi | 88% | 2779 fps | 100% |
| Hodgdon H4895 | <<locked>> | 96% | 57,493 psi | 88% | 2917 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,782 psi | 86% | 2940 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,866 psi | 52% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 55,709 psi | 86% | 2867 fps | 99.2% |
| IMR 3031 | <<locked>> | 96% | 56,217 psi | 86% | 2907 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 57,276 psi | 88% | 2874 fps | 98.8% |
| IMR 4198 | <<locked>> | 90% | 58,697 psi | 90% | 2792 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 55,492 psi | 85% | 2917 fps | 99% |
| IMR 8208 XBR | <<locked>> | 94% | 56,405 psi | 87% | 2861 fps | 99.7% |
| Lovex D073.4 | <<locked>> | 84% | 56,826 psi | 87% | 2861 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 56,579 psi | 87% | 2854 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 96% | 55,651 psi | 86% | 2881 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 57,754 psi | 89% | 2838 fps | 99.1% |
| Lovex S062ᴾ | <<locked>> | 100% | 56,347 psi | 87% | 2874 fps | 99.7% |
| Norma 200 | <<locked>> | 86% | 57,740 psi | 89% | 2805 fps | 100% |
| Norma 201 | <<locked>> | 96% | 55,448 psi | 85% | 2848 fps | 99.6% |
| Norma 202 | <<locked>> | 96% | 55,825 psi | 86% | 2858 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 56,898 psi | 88% | 2923 fps | 99.1% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 57,667 psi | 89% | 2949 fps | 99.1% |
| Ramshot TAC | <<locked>> | 94% | 57,580 psi | 89% | 2874 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 94% | 56,159 psi | 86% | 2894 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 92% | 58,276 psi | 90% | 2867 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,982 psi | 52% | 1739 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 56,347 psi | 87% | 2854 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 56,260 psi | 87% | 2861 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 57,711 psi | 89% | 3002 fps | 98.9% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,502 psi | 78% | 2920 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 94% | 56,101 psi | 86% | 2835 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 55,506 psi | 85% | 2838 fps | 99.6% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,313 psi | 76% | 2802 fps | 98.7% |
| Shooters World AR Plus | <<locked>> | 84% | 56,826 psi | 87% | 2861 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 55,651 psi | 86% | 2881 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 56,347 psi | 87% | 2874 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 56,971 psi | 88% | 2828 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 55,956 psi | 86% | 2493 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 55,651 psi | 86% | 2854 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,750 psi | 80% | 2871 fps | 98.4% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 55,550 psi | 85% | 2805 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 55,172 psi | 85% | 2844 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,361 psi | 85% | 2871 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 58,218 psi | 90% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,114 psi | 83% | 2749 fps | 100% |
| Somchem S321 | <<locked>> | 92% | 57,943 psi | 89% | 2904 fps | 99.9% |
| Somchem S335 | <<locked>> | 96% | 56,884 psi | 88% | 2799 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 58,378 psi | 90% | 2894 fps | 99.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,314 psi | 77% | 2805 fps | 98.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,853 psi | 55% | 2615 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 84% | 56,275 psi | 87% | 2697 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 58,030 psi | 89% | 2779 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 57,856 psi | 89% | 2789 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 58,001 psi | 89% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 56,217 psi | 86% | 2835 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,704 psi | 75% | 2746 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 94% | 57,435 psi | 88% | 2867 fps | 99.7% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 58,204 psi | 90% | 2881 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 44,614 psi | 69% | 2680 fps | 97.4% |
| Winchester 748 | <<locked>> | 94% | 56,159 psi | 86% | 2910 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 98% | 58,813 psi | 90% | 2933 fps | 99.6% |
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% | 54,099 psi | 83% | 2697 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 37,101 psi | 57% | 2493 fps | 99.9% |
| Accurate 2200 | <<locked>> | 80% | 48,298 psi | 74% | 2749 fps | 97% |
| Accurate 2230 | <<locked>> | 80% | 48,385 psi | 74% | 2756 fps | 97.4% |
| Accurate 2460 | <<locked>> | 80% | 40,016 psi | 62% | 2579 fps | 99.1% |
| Accurate 2495 | <<locked>> | 80% | 29,182 psi | 45% | 2375 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 35,360 psi | 54% | 2520 fps | 97.8% |
| Accurate 4064 | <<locked>> | 80% | 27,659 psi | 43% | 2349 fps | 96.3% |
| Accurate LT-30 | <<locked>> | 80% | 45,977 psi | 71% | 2589 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,369 psi | 71% | 2605 fps | 99.6% |
| ADI APS 450 | <<locked>> | 80% | 56,652 psi | 87% | 2103 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 38,754 psi | 60% | 2582 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 49,864 psi | 77% | 2661 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 39,900 psi | 61% | 2582 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 45,165 psi | 69% | 2690 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,027 psi | 55% | 2497 fps | 96.1% |
| Alliant AR-Comp | <<locked>> | 80% | 34,389 psi | 53% | 2516 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,336 psi | 64% | 2684 fps | 97% |
| Alliant Power Pro 2000-MR | 59.5 gr | 90% | 43,178 psi | 66% | 2759 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,721 psi | 52% | 2493 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,322 psi | 65% | 2598 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 39,218 psi | 60% | 2612 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 94% | 38,566 psi | 59% | 2667 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 50,749 psi | 78% | 2677 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,686 psi | 69% | 2582 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 43,468 psi | 67% | 2690 fps | 95.6% |
| Bofors RP3 | <<locked>> | 88% | 35,172 psi | 54% | 2543 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,377 psi | 59% | 2507 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,779 psi | 52% | 2500 fps | 96.1% |
| Hodgdon CFE223 | 55.5 gr | 82% | 40,147 psi | 62% | 2684 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 41,176 psi | 63% | 2618 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 41,655 psi | 64% | 2635 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 94% | 45,165 psi | 69% | 2713 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 50,676 psi | 78% | 2680 fps | 100% |
| Hodgdon H4895 | <<locked>> | 82% | 36,637 psi | 56% | 2543 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 34,809 psi | 54% | 2546 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,961 psi | 38% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 37,927 psi | 58% | 2552 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 32,880 psi | 51% | 2500 fps | 99.2% |
| IMR 4064 | <<locked>> | 88% | 39,305 psi | 60% | 2566 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 43,555 psi | 67% | 2579 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 37,637 psi | 58% | 2592 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 36,027 psi | 55% | 2497 fps | 96.1% |
| Lovex D073.4 | <<locked>> | 80% | 49,139 psi | 76% | 2746 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 39,958 psi | 61% | 2582 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 80% | 31,908 psi | 49% | 2451 fps | 96.7% |
| Lovex S060 | <<locked>> | 82% | 37,550 psi | 58% | 2484 fps | 95.1% |
| Lovex S062 | <<locked>> | 84% | 33,910 psi | 52% | 2464 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 47,848 psi | 74% | 2667 fps | 100% |
| Norma 201 | <<locked>> | 80% | 33,344 psi | 51% | 2434 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 33,185 psi | 51% | 2454 fps | 97.8% |
| Norma 203B | <<locked>> | 88% | 38,450 psi | 59% | 2598 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 88% | 38,363 psi | 59% | 2612 fps | 95% |
| Ramshot TAC | <<locked>> | 90% | 50,328 psi | 77% | 2762 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,405 psi | 58% | 2559 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,349 psi | 61% | 2546 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,193 psi | 39% | 1555 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,611 psi | 62% | 2592 fps | 98.6% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 52,866 psi | 81% | 2808 fps | 95.1% |
| ReloadSwiss RS 52 | 56.4 gr | 88% | 40,770 psi | 63% | 2710 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 31,618 psi | 49% | 2500 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 36,767 psi | 57% | 2500 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 33,721 psi | 52% | 2438 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 90% | 35,085 psi | 54% | 2533 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 49,139 psi | 76% | 2746 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,908 psi | 49% | 2451 fps | 96.7% |
| Shooters World Precision | <<locked>> | 84% | 33,910 psi | 52% | 2464 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,120 psi | 66% | 2605 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,212 psi | 77% | 2421 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,426 psi | 70% | 2694 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 39,610 psi | 61% | 2644 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,105 psi | 66% | 2615 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 47,790 psi | 74% | 2726 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,362 psi | 57% | 2549 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,157 psi | 54% | 2418 fps | 98.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,514 psi | 44% | 2280 fps | 97.2% |
| Somchem S321 | <<locked>> | 80% | 38,377 psi | 59% | 2569 fps | 97.2% |
| Somchem S335 | <<locked>> | 80% | 34,650 psi | 53% | 2425 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 38,537 psi | 59% | 2566 fps | 95.3% |
| Somchem S355 | <<locked>> | 90% | 36,477 psi | 56% | 2546 fps | 95.4% |
| Somchem S365 | <<locked>> | 98% | 33,692 psi | 52% | 2562 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 49,850 psi | 77% | 2615 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 40,074 psi | 62% | 2510 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,201 psi | 54% | 2428 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 30,139 psi | 46% | 2388 fps | 99.2% |
| Vihtavuori N140 | <<locked>> | 80% | 31,415 psi | 48% | 2392 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 32,619 psi | 50% | 2434 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 35,882 psi | 55% | 2490 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 80% | 30,081 psi | 46% | 2372 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 38,914 psi | 60% | 2569 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 34,635 psi | 53% | 2526 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 36,492 psi | 56% | 2549 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 92 powders for .338 Weatherby RPM loaded with the .338 | 185gr | Hornady CX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,009 fps; across all powders the maximum-charge window runs from 1,699 fps to 3,009 fps. Accurate 2495 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, 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 Weatherby RPM with the .338 | 185gr | Hornady CX 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.