Load Specifications
Bullet:.338 | 190gr | Brenneke TAG
Bullet Manufacturer:Brenneke
Bullet Weight:190 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Weatherby RPM load data
Case Length (l3):2.55"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:81.6 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:14.5
Load data in caliber .338 Weatherby RPM with .338 | 190gr | Brenneke TAG bullet and 98 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% | 57,188 psi | 88% | 2785 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 58,131 psi | 89% | 2890 fps | 99% |
| Accurate 2230 | <<locked>> | 82% | 55,056 psi | 85% | 2844 fps | 98.9% |
| Accurate 2460 | <<locked>> | 88% | 56,057 psi | 86% | 2815 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 57,653 psi | 89% | 2841 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 57,595 psi | 89% | 2874 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 57,029 psi | 88% | 2877 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,496 psi | 65% | 2713 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 86% | 57,740 psi | 89% | 2740 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 58,175 psi | 89% | 2766 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 58,784 psi | 90% | 2123 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,507 psi | 87% | 2877 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 82% | 55,811 psi | 86% | 2717 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 57,566 psi | 89% | 2867 fps | 99% |
| ADI AR 2219 | <<locked>> | 86% | 58,639 psi | 90% | 2864 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,883 psi | 86% | 2835 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 55,361 psi | 85% | 2818 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 57,290 psi | 88% | 2940 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 56,202 psi | 86% | 2986 fps | 98.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,376 psi | 87% | 2887 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 88% | 57,450 psi | 88% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 57,580 psi | 89% | 2910 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,526 psi | 67% | 2730 fps | 96.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,140 psi | 77% | 2887 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 56,652 psi | 87% | 2733 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 57,029 psi | 88% | 2740 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,521 psi | 87% | 2890 fps | 98.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 56,710 psi | 87% | 2900 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 92% | 58,247 psi | 90% | 2822 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 94% | 58,349 psi | 90% | 2913 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,492 psi | 87% | 2956 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 56,855 psi | 87% | 2841 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 58,073 psi | 89% | 2867 fps | 100% |
| Hodgdon H380ᴾ | <<locked>> | 100% | 58,726 psi | 90% | 2913 fps | 98.4% |
| Hodgdon H4198 | <<locked>> | 82% | 56,202 psi | 86% | 2743 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 56,971 psi | 88% | 2887 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,392 psi | 61% | 2612 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,535 psi | 85% | 2913 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,185 psi | 53% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 58,798 psi | 90% | 2894 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 56,086 psi | 86% | 2877 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 56,884 psi | 88% | 2851 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 96% | 58,175 psi | 89% | 2831 fps | 96.1% |
| IMR 4198 | <<locked>> | 88% | 57,870 psi | 89% | 2759 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 55,274 psi | 85% | 2890 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 92% | 55,883 psi | 86% | 2835 fps | 99.8% |
| Lovex D073.4 | <<locked>> | 82% | 55,956 psi | 86% | 2825 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 56,130 psi | 86% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,216 psi | 85% | 2851 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 57,014 psi | 88% | 2808 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 55,869 psi | 86% | 2844 fps | 99.9% |
| Norma 200 | <<locked>> | 84% | 57,058 psi | 88% | 2769 fps | 100% |
| Norma 201 | <<locked>> | 96% | 58,363 psi | 90% | 2867 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 55,390 psi | 85% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,579 psi | 87% | 2897 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 43,120 psi | 66% | 2713 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 98% | 57,421 psi | 88% | 2927 fps | 99.4% |
| Ramshot TAC | <<locked>> | 92% | 56,695 psi | 87% | 2848 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,506 psi | 85% | 2864 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 90% | 57,537 psi | 89% | 2838 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,345 psi | 53% | 1736 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,622 psi | 86% | 2822 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,912 psi | 86% | 2841 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 57,566 psi | 89% | 2979 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,722 psi | 83% | 2956 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 55,869 psi | 86% | 2812 fps | 100% |
| Rottweil R 902 | <<locked>> | 98% | 58,726 psi | 90% | 2864 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,547 psi | 81% | 2831 fps | 99.4% |
| Shooters World AR Plus | <<locked>> | 82% | 55,956 psi | 86% | 2825 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,216 psi | 85% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,869 psi | 86% | 2844 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 56,057 psi | 86% | 2799 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 57,783 psi | 89% | 2490 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 58,682 psi | 90% | 2871 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,897 psi | 84% | 2900 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 58,697 psi | 90% | 2822 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 58,479 psi | 90% | 2877 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 58,639 psi | 90% | 2900 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 57,551 psi | 89% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 57,188 psi | 88% | 2769 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 57,305 psi | 88% | 2874 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 56,318 psi | 87% | 2772 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 57,856 psi | 89% | 2871 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,388 psi | 82% | 2835 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,334 psi | 59% | 2661 fps | 97.9% |
| Vihtavuori N120 | <<locked>> | 82% | 55,651 psi | 86% | 2664 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 57,363 psi | 88% | 2746 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 57,348 psi | 88% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 57,638 psi | 89% | 2831 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,956 psi | 86% | 2808 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,663 psi | 79% | 2772 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,614 psi | 70% | 2720 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 92% | 56,449 psi | 87% | 2835 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 98% | 57,711 psi | 89% | 2851 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,512 psi | 68% | 2720 fps | 95.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,137 psi | 73% | 2713 fps | 98.6% |
| Winchester 748 | <<locked>> | 92% | 55,709 psi | 86% | 2884 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 96% | 58,276 psi | 90% | 2907 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% | 39,247 psi | 60% | 2513 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,836 psi | 78% | 2779 fps | 98% |
| Accurate 2230 | <<locked>> | 80% | 51,198 psi | 79% | 2782 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 42,569 psi | 65% | 2605 fps | 99.6% |
| Accurate 2495 | <<locked>> | 80% | 31,285 psi | 48% | 2402 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 37,797 psi | 58% | 2549 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 29,617 psi | 46% | 2379 fps | 97.6% |
| Accurate 4350 | <<locked>> | 98% | 39,697 psi | 61% | 2657 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 48,022 psi | 74% | 2602 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,399 psi | 74% | 2621 fps | 99.9% |
| ADI APS 450 | <<locked>> | 80% | 56,985 psi | 88% | 2100 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,027 psi | 55% | 2500 fps | 95.2% |
| ADI AR 2207 | <<locked>> | 80% | 52,417 psi | 81% | 2671 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 39,610 psi | 61% | 2559 fps | 95.5% |
| ADI AR 2219 | <<locked>> | 80% | 47,659 psi | 73% | 2707 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,087 psi | 59% | 2523 fps | 97.3% |
| Alliant AR-Comp | <<locked>> | 80% | 36,651 psi | 56% | 2533 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,932 psi | 68% | 2717 fps | 98.1% |
| Alliant Power Pro 2000-MR | 58.8 gr | 86% | 39,958 psi | 61% | 2674 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,649 psi | 52% | 2470 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,686 psi | 69% | 2615 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 39,088 psi | 60% | 2592 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,799 psi | 63% | 2671 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 90% | 35,650 psi | 55% | 2585 fps | 95.2% |
| Alliant Reloder-7 | <<locked>> | 80% | 53,084 psi | 82% | 2687 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,876 psi | 72% | 2598 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 40,161 psi | 62% | 2608 fps | 95.2% |
| Bofors RP3 | <<locked>> | 84% | 32,866 psi | 51% | 2467 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,205 psi | 62% | 2526 fps | 98.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,027 psi | 55% | 2533 fps | 97.4% |
| Hodgdon CFE223 | 55.9 gr | 80% | 39,595 psi | 61% | 2654 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 43,613 psi | 67% | 2641 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,092 psi | 68% | 2657 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 41,974 psi | 65% | 2638 fps | 95% |
| Hodgdon H4198 | <<locked>> | 80% | 52,881 psi | 81% | 2697 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,245 psi | 56% | 2513 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,838 psi | 54% | 2510 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 34,534 psi | 53% | 2523 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,309 psi | 39% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,998 psi | 54% | 2470 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 35,027 psi | 54% | 2526 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 38,914 psi | 60% | 2543 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,607 psi | 84% | 2779 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 45,672 psi | 70% | 2589 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 34,998 psi | 54% | 2513 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 38,087 psi | 59% | 2523 fps | 97.3% |
| Lovex D073.4 | <<locked>> | 80% | 52,040 psi | 80% | 2769 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,177 psi | 65% | 2605 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 34,069 psi | 52% | 2480 fps | 97.9% |
| Lovex S060 | <<locked>> | 80% | 37,028 psi | 57% | 2457 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 31,633 psi | 49% | 2392 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 50,299 psi | 77% | 2677 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,186 psi | 54% | 2461 fps | 96.5% |
| Norma 202 | <<locked>> | 80% | 35,331 psi | 54% | 2480 fps | 98.7% |
| Norma 203B | <<locked>> | 84% | 35,882 psi | 55% | 2523 fps | 95.2% |
| Norma URP | <<locked>> | 98% | 40,553 psi | 62% | 2661 fps | 95% |
| Ramshot Big Game | <<locked>> | 86% | 38,087 psi | 59% | 2589 fps | 95.6% |
| Ramshot TAC | <<locked>> | 86% | 46,572 psi | 72% | 2680 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,941 psi | 57% | 2533 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,481 psi | 64% | 2572 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,367 psi | 39% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,830 psi | 66% | 2615 fps | 99.3% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 52,156 psi | 80% | 2785 fps | 95.7% |
| ReloadSwiss RS 52 | 55.6 gr | 84% | 37,753 psi | 58% | 2625 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 31,256 psi | 48% | 2480 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 38,609 psi | 59% | 2520 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 80% | 33,475 psi | 51% | 2415 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 86% | 32,953 psi | 51% | 2461 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 52,040 psi | 80% | 2769 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,069 psi | 52% | 2480 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 31,633 psi | 49% | 2392 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,513 psi | 70% | 2631 fps | 98.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,069 psi | 80% | 2421 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,950 psi | 74% | 2717 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 36,999 psi | 57% | 2572 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,455 psi | 70% | 2631 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 44,179 psi | 68% | 2648 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 37,057 psi | 57% | 2523 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,028 psi | 57% | 2441 fps | 99% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,197 psi | 46% | 2303 fps | 98.3% |
| Somchem S321 | <<locked>> | 80% | 40,654 psi | 63% | 2598 fps | 98.2% |
| Somchem S335 | <<locked>> | 80% | 36,492 psi | 56% | 2444 fps | 99.4% |
| Somchem S341 | <<locked>> | 82% | 38,159 psi | 59% | 2539 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 34,229 psi | 53% | 2474 fps | 95.2% |
| Somchem S365 | <<locked>> | 94% | 31,589 psi | 49% | 2490 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 52,373 psi | 81% | 2621 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,177 psi | 65% | 2526 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,144 psi | 57% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,184 psi | 50% | 2415 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 33,417 psi | 51% | 2421 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 30,429 psi | 47% | 2362 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 98% | 42,888 psi | 66% | 2671 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 37,971 psi | 58% | 2520 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,923 psi | 49% | 2398 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 98% | 41,684 psi | 64% | 2667 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,027 psi | 55% | 2493 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 36,724 psi | 56% | 2552 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,678 psi | 52% | 2467 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 98 powders for .338 Weatherby RPM loaded with the .338 | 190gr | Brenneke TAG. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,696 fps to 2,986 fps. Accurate 4064 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.338" calls for a 1:14.5 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 Weatherby RPM with the .338 | 190gr | Brenneke TAG 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.