Load Specifications
Load data in caliber .338 Weatherby RPM with .338 | 185gr | Barnes TTSX BT bullet and 91 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.
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 1680 | <<locked>> | 82% | 58,798 psi | 90% | 2766 fps | 100% |
| Accurate 2015 | <<locked>> | 92% | 55,608 psi | 86% | 2799 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 56,565 psi | 87% | 2897 fps | 98.6% |
| Accurate 2230 | <<locked>> | 84% | 57,566 psi | 89% | 2910 fps | 98.9% |
| Accurate 2460 | <<locked>> | 90% | 57,899 psi | 89% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 55,492 psi | 85% | 2851 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,622 psi | 86% | 2877 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,955 psi | 85% | 2884 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 56,391 psi | 87% | 2753 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 56,826 psi | 87% | 2776 fps | 100% |
| ADI AR 2206H | <<locked>> | 96% | 58,407 psi | 90% | 2933 fps | 99.3% |
| ADI AR 2207 | <<locked>> | 84% | 57,667 psi | 89% | 2772 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,869 psi | 86% | 2874 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 86% | 56,710 psi | 87% | 2874 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 57,740 psi | 89% | 2890 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 94% | 57,174 psi | 88% | 2877 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 55,579 psi | 86% | 2946 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 58,276 psi | 90% | 3041 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 54,520 psi | 84% | 2890 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,579 psi | 86% | 2808 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 55,477 psi | 85% | 2910 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 48,327 psi | 74% | 2881 fps | 98.5% |
| Alliant Reloder-7 | <<locked>> | 84% | 58,581 psi | 90% | 2792 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 55,492 psi | 85% | 2753 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 58,450 psi | 90% | 2946 fps | 98.6% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,723 psi | 84% | 2904 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,550 psi | 87% | 2828 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 94% | 56,478 psi | 87% | 2920 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 92% | 58,624 psi | 90% | 3018 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 90% | 58,813 psi | 90% | 2900 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 56,231 psi | 87% | 2877 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 56,826 psi | 87% | 2913 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 84% | 58,523 psi | 90% | 2802 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 55,158 psi | 85% | 2890 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 57,334 psi | 88% | 2972 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,011 psi | 52% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 57,029 psi | 88% | 2897 fps | 99.5% |
| IMR 3031 | <<locked>> | 96% | 57,595 psi | 89% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,129 psi | 85% | 2854 fps | 98.7% |
| IMR 4198 | <<locked>> | 88% | 56,362 psi | 87% | 2772 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 56,840 psi | 87% | 2946 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 94% | 57,740 psi | 89% | 2890 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 84% | 58,146 psi | 89% | 2887 fps | 100% |
| Lovex D073.5 | <<locked>> | 90% | 57,986 psi | 89% | 2881 fps | 100% |
| Lovex D073.6 | <<locked>> | 96% | 57,058 psi | 88% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 96% | 58,755 psi | 90% | 2864 fps | 99.3% |
| Lovex S062ᴾ | <<locked>> | 100% | 57,740 psi | 89% | 2904 fps | 99.8% |
| Norma 200 | <<locked>> | 84% | 55,434 psi | 85% | 2782 fps | 100% |
| Norma 201 | <<locked>> | 96% | 56,579 psi | 87% | 2874 fps | 99.8% |
| Norma 202 | <<locked>> | 96% | 57,246 psi | 88% | 2887 fps | 100% |
| Norma 203Bᴾ | <<locked>> | 100% | 58,218 psi | 90% | 2953 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 98% | 55,303 psi | 85% | 2927 fps | 98.9% |
| Ramshot TAC | <<locked>> | 92% | 55,027 psi | 85% | 2848 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 94% | 57,624 psi | 89% | 2927 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,898 psi | 86% | 2844 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,156 psi | 53% | 1752 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 57,827 psi | 89% | 2884 fps | 100% |
| ReloadSwiss RS 50ᴾ | <<locked>> | 100% | 57,914 psi | 89% | 2897 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 55,463 psi | 85% | 2979 fps | 98.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 51,735 psi | 80% | 2953 fps | 100% |
| Rottweil R 901 | <<locked>> | 94% | 57,363 psi | 88% | 2864 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 56,913 psi | 88% | 2871 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 50,604 psi | 78% | 2831 fps | 99% |
| Shooters World AR Plus | <<locked>> | 84% | 58,146 psi | 89% | 2887 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 57,058 psi | 88% | 2907 fps | 100% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 57,740 psi | 89% | 2904 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 58,059 psi | 89% | 2854 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 56,753 psi | 87% | 2510 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 57,116 psi | 88% | 2884 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 53,156 psi | 82% | 2900 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 57,000 psi | 88% | 2835 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 56,623 psi | 87% | 2877 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 56,884 psi | 88% | 2904 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 56,115 psi | 86% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2776 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 55,521 psi | 85% | 2877 fps | 99.8% |
| Somchem S335 | <<locked>> | 96% | 57,943 psi | 89% | 2825 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 55,811 psi | 86% | 2871 fps | 99% |
| Somchem S355ᴾ | <<locked>> | 100% | 51,619 psi | 79% | 2838 fps | 98.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,970 psi | 57% | 2654 fps | 97.1% |
| Vihtavuori N120 | <<locked>> | 84% | 57,580 psi | 89% | 2720 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 55,883 psi | 86% | 2759 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,869 psi | 86% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 55,883 psi | 86% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 57,914 psi | 89% | 2864 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,937 psi | 77% | 2772 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 92% | 54,998 psi | 85% | 2844 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 98% | 55,956 psi | 86% | 2861 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,556 psi | 70% | 2710 fps | 97.9% |
| Winchester 748 | <<locked>> | 94% | 57,551 psi | 89% | 2940 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 56,449 psi | 87% | 2913 fps | 99.5% |
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% | 55,114 psi | 85% | 2720 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 37,985 psi | 58% | 2516 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 49,400 psi | 76% | 2782 fps | 97.4% |
| Accurate 2230 | <<locked>> | 80% | 49,676 psi | 76% | 2789 fps | 97.8% |
| Accurate 2460 | <<locked>> | 80% | 41,191 psi | 63% | 2608 fps | 99.3% |
| Accurate 2495 | <<locked>> | 80% | 29,994 psi | 46% | 2402 fps | 99.3% |
| Accurate 2520 | <<locked>> | 80% | 36,506 psi | 56% | 2552 fps | 98.2% |
| Accurate 4064 | <<locked>> | 80% | 28,413 psi | 44% | 2375 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 80% | 46,775 psi | 72% | 2612 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 47,152 psi | 73% | 2631 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 37,289 psi | 57% | 2556 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 50,923 psi | 78% | 2684 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 40,901 psi | 63% | 2615 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 46,224 psi | 71% | 2717 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,927 psi | 57% | 2526 fps | 96.5% |
| Alliant AR-Comp | <<locked>> | 80% | 35,476 psi | 55% | 2543 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 42,467 psi | 65% | 2717 fps | 97.4% |
| Alliant Power Pro 2000-MR | 59.5 gr | 88% | 41,220 psi | 63% | 2730 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,592 psi | 53% | 2523 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 43,265 psi | 67% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,219 psi | 62% | 2641 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,970 psi | 57% | 2641 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,938 psi | 80% | 2703 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,672 psi | 70% | 2608 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 41,582 psi | 64% | 2664 fps | 95.2% |
| Bofors RP3 | <<locked>> | 86% | 33,779 psi | 52% | 2516 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,102 psi | 60% | 2530 fps | 97.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,592 psi | 53% | 2526 fps | 96.5% |
| Hodgdon CFE223 | 56.8 gr | 82% | 41,162 psi | 63% | 2717 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 42,250 psi | 65% | 2648 fps | 99.9% |
| Hodgdon H335 | <<locked>> | 80% | 42,757 psi | 66% | 2661 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 94% | 46,369 psi | 71% | 2746 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 51,576 psi | 79% | 2707 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 35,085 psi | 54% | 2513 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,737 psi | 55% | 2579 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,092 psi | 39% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,260 psi | 56% | 2526 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,736 psi | 52% | 2526 fps | 99.4% |
| IMR 4064 | <<locked>> | 88% | 40,364 psi | 62% | 2598 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 44,556 psi | 69% | 2602 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 38,522 psi | 59% | 2618 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 36,927 psi | 57% | 2526 fps | 96.5% |
| Lovex D073.4 | <<locked>> | 80% | 50,459 psi | 78% | 2779 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 40,886 psi | 63% | 2608 fps | 98.5% |
| Lovex D073.6 | <<locked>> | 80% | 32,837 psi | 51% | 2480 fps | 97.1% |
| Lovex S060 | <<locked>> | 82% | 38,435 psi | 59% | 2513 fps | 95.6% |
| Lovex S062 | <<locked>> | 82% | 32,677 psi | 50% | 2444 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 48,776 psi | 75% | 2690 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,040 psi | 52% | 2461 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 34,142 psi | 53% | 2484 fps | 98.2% |
| Norma 203B | <<locked>> | 86% | 36,912 psi | 57% | 2575 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 88% | 39,233 psi | 60% | 2641 fps | 95.5% |
| Ramshot TAC | <<locked>> | 88% | 48,298 psi | 74% | 2736 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 38,203 psi | 59% | 2585 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 40,118 psi | 62% | 2572 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,309 psi | 39% | 1568 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,568 psi | 64% | 2621 fps | 98.9% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 53,969 psi | 83% | 2838 fps | 95.6% |
| ReloadSwiss RS 52 | 56.4 gr | 86% | 39,073 psi | 60% | 2680 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 32,358 psi | 50% | 2533 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 37,565 psi | 58% | 2526 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,387 psi | 50% | 2415 fps | 95% |
| Rottweil R 903 | <<locked>> | 90% | 36,114 psi | 56% | 2562 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 80% | 50,459 psi | 78% | 2779 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,837 psi | 51% | 2480 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 32,677 psi | 50% | 2444 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 44,005 psi | 68% | 2631 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 51,053 psi | 79% | 2441 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,572 psi | 72% | 2723 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 38,116 psi | 59% | 2621 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 44,309 psi | 68% | 2644 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 45,832 psi | 71% | 2703 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 38,348 psi | 59% | 2579 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 36,100 psi | 56% | 2448 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,356 psi | 45% | 2306 fps | 97.7% |
| Somchem S321 | <<locked>> | 80% | 39,436 psi | 61% | 2602 fps | 97.6% |
| Somchem S335 | <<locked>> | 80% | 35,360 psi | 54% | 2448 fps | 99% |
| Somchem S341 | <<locked>> | 84% | 39,479 psi | 61% | 2592 fps | 95.8% |
| Somchem S355 | <<locked>> | 88% | 35,230 psi | 54% | 2526 fps | 95.1% |
| Somchem S365 | <<locked>> | 96% | 32,372 psi | 50% | 2536 fps | 95.2% |
| Vihtavuori N120 | <<locked>> | 80% | 50,894 psi | 78% | 2635 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 41,133 psi | 63% | 2536 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,201 psi | 56% | 2457 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 31,140 psi | 48% | 2418 fps | 99.4% |
| Vihtavuori N140 | <<locked>> | 80% | 32,285 psi | 50% | 2421 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 31,314 psi | 48% | 2411 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 36,796 psi | 57% | 2520 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 80% | 30,879 psi | 48% | 2398 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 37,246 psi | 57% | 2543 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 35,520 psi | 55% | 2552 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,867 psi | 54% | 2523 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 91 powders for .338 Weatherby RPM loaded with the .338 | 185gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,713 fps to 3,041 fps. Accurate 4064 gives the best case fill at 100 %, and 91 of the 91 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 | Barnes TTSX BT 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.