Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:210 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:1:13.0
Load data in caliber .338 Weatherby RPM with .338 | 210gr | Barnes TTSX BT bullet and 104 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 2015 | <<locked>> | 90% | 55,477 psi | 85% | 2608 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 56,014 psi | 86% | 2707 fps | 99.2% |
| Accurate 2230 | <<locked>> | 82% | 57,116 psi | 88% | 2720 fps | 99.5% |
| Accurate 2460 | <<locked>> | 88% | 57,827 psi | 89% | 2684 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,854 psi | 86% | 2664 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,608 psi | 86% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 96% | 57,580 psi | 89% | 2661 fps | 95.9% |
| Accurate 4064 | <<locked>> | 98% | 55,550 psi | 85% | 2703 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,338 psi | 68% | 2608 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 84% | 55,622 psi | 86% | 2559 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,028 psi | 86% | 2582 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 58,030 psi | 89% | 2743 fps | 99.8% |
| ADI AR 2207 | <<locked>> | 82% | 57,334 psi | 88% | 2575 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 55,535 psi | 85% | 2690 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 84% | 56,275 psi | 87% | 2677 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 57,450 psi | 88% | 2703 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 57,319 psi | 88% | 2680 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,651 psi | 86% | 2756 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 58,015 psi | 89% | 2858 fps | 99.6% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 58,204 psi | 90% | 2756 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,506 psi | 85% | 2615 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,709 psi | 86% | 2733 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,773 psi | 69% | 2618 fps | 97.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,808 psi | 80% | 2769 fps | 99.7% |
| Alliant Reloder-7 | <<locked>> | 82% | 58,117 psi | 89% | 2592 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 58,523 psi | 90% | 2605 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 58,204 psi | 90% | 2762 fps | 99.3% |
| Bofors RP3 | <<locked>> | 98% | 54,824 psi | 84% | 2723 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 56,362 psi | 87% | 2644 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 56,318 psi | 87% | 2733 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 58,697 psi | 90% | 2831 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 88% | 58,450 psi | 90% | 2703 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,057 psi | 86% | 2684 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 56,811 psi | 87% | 2736 fps | 98.7% |
| Hodgdon H4198 | <<locked>> | 82% | 57,841 psi | 89% | 2608 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 58,537 psi | 90% | 2756 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,814 psi | 63% | 2507 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 57,537 psi | 89% | 2789 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,534 psi | 53% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,884 psi | 88% | 2713 fps | 99.9% |
| IMR 3031 | <<locked>> | 94% | 57,914 psi | 89% | 2740 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 58,508 psi | 90% | 2720 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 94% | 56,014 psi | 86% | 2657 fps | 96.6% |
| IMR 4198 | <<locked>> | 86% | 56,014 psi | 86% | 2575 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 54,926 psi | 85% | 2671 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,583 psi | 66% | 2556 fps | 96.9% |
| IMR 4895 | <<locked>> | 96% | 57,101 psi | 88% | 2762 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 92% | 57,450 psi | 88% | 2703 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 57,595 psi | 89% | 2690 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 57,783 psi | 89% | 2694 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 57,290 psi | 88% | 2723 fps | 100% |
| Lovex S060 | <<locked>> | 94% | 58,479 psi | 90% | 2677 fps | 99.8% |
| Lovex S062 | <<locked>> | 98% | 57,870 psi | 89% | 2720 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,067 psi | 77% | 2612 fps | 96.9% |
| Norma 200 | <<locked>> | 84% | 58,639 psi | 90% | 2631 fps | 100% |
| Norma 201 | <<locked>> | 94% | 56,623 psi | 87% | 2690 fps | 100% |
| Norma 202 | <<locked>> | 94% | 57,101 psi | 88% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 98% | 58,320 psi | 90% | 2769 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 44,628 psi | 69% | 2605 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 96% | 55,303 psi | 85% | 2746 fps | 99.6% |
| Ramshot TAC | <<locked>> | 92% | 58,334 psi | 90% | 2723 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 92% | 57,421 psi | 88% | 2740 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,434 psi | 85% | 2661 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,795 psi | 54% | 1634 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 57,261 psi | 88% | 2690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 57,595 psi | 89% | 2720 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,622 psi | 86% | 2795 fps | 99.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,419 psi | 85% | 2828 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,324 psi | 68% | 2628 fps | 96.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,803 psi | 70% | 2648 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 92% | 57,348 psi | 88% | 2674 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 57,000 psi | 88% | 2687 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,418 psi | 84% | 2707 fps | 99.8% |
| Shooters World AR Plus | <<locked>> | 82% | 57,595 psi | 89% | 2690 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,067 psi | 77% | 2612 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 57,290 psi | 88% | 2723 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 57,870 psi | 89% | 2720 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 57,566 psi | 89% | 2667 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,912 psi | 86% | 2323 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 56,710 psi | 87% | 2690 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 56,884 psi | 88% | 2772 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 56,681 psi | 87% | 2638 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 56,159 psi | 86% | 2697 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 56,550 psi | 87% | 2720 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,753 psi | 86% | 2598 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 2631 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 55,332 psi | 85% | 2694 fps | 100% |
| Somchem S335 | <<locked>> | 94% | 57,856 psi | 89% | 2638 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,666 psi | 86% | 2690 fps | 99.6% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,303 psi | 85% | 2713 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,755 psi | 61% | 2556 fps | 99% |
| Vihtavuori N120 | <<locked>> | 82% | 57,203 psi | 88% | 2526 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 55,579 psi | 86% | 2569 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,666 psi | 86% | 2585 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,101 psi | 86% | 2657 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 57,667 psi | 89% | 2674 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,374 psi | 82% | 2648 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,253 psi | 73% | 2608 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 92% | 58,189 psi | 90% | 2703 fps | 100% |
| Vihtavuori N540 | <<locked>> | 96% | 55,680 psi | 86% | 2674 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,122 psi | 71% | 2608 fps | 97.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,443 psi | 75% | 2598 fps | 99.3% |
| Winchester 748 | <<locked>> | 92% | 57,363 psi | 88% | 2749 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 56,376 psi | 87% | 2730 fps | 99.9% |
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% | 40,553 psi | 62% | 2395 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,199 psi | 80% | 2648 fps | 98.8% |
| Accurate 2230 | <<locked>> | 80% | 52,924 psi | 81% | 2661 fps | 99.2% |
| Accurate 2460 | <<locked>> | 80% | 43,859 psi | 67% | 2487 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 32,503 psi | 50% | 2297 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,320 psi | 60% | 2441 fps | 99.5% |
| Accurate 2700 | <<locked>> | 94% | 53,795 psi | 83% | 2608 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 30,763 psi | 47% | 2280 fps | 98.6% |
| Accurate 4350 | <<locked>> | 96% | 38,508 psi | 59% | 2500 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 49,298 psi | 76% | 2474 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,690 psi | 76% | 2497 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,231 psi | 57% | 2395 fps | 96.6% |
| ADI AR 2207 | <<locked>> | 80% | 53,795 psi | 83% | 2533 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 35,940 psi | 55% | 2352 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 49,211 psi | 76% | 2582 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,320 psi | 60% | 2415 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 38,203 psi | 59% | 2415 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,498 psi | 70% | 2598 fps | 99% |
| Alliant Power Pro 2000-MR | 54.6 gr | 84% | 38,464 psi | 59% | 2510 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,545 psi | 47% | 2267 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,992 psi | 71% | 2487 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,346 psi | 54% | 2375 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,537 psi | 61% | 2513 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,519 psi | 53% | 2431 fps | 95.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 54,621 psi | 84% | 2549 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,138 psi | 74% | 2470 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,653 psi | 59% | 2444 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 29,617 psi | 46% | 2260 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,524 psi | 64% | 2415 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,246 psi | 57% | 2425 fps | 98.4% |
| Hodgdon CFE223 | 53.2 gr | 80% | 41,031 psi | 63% | 2546 fps | 97.1% |
| Hodgdon H322 | <<locked>> | 80% | 44,817 psi | 69% | 2513 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,484 psi | 70% | 2536 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 40,466 psi | 62% | 2474 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 80% | 54,302 psi | 84% | 2562 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 37,492 psi | 58% | 2408 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,823 psi | 52% | 2359 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,518 psi | 52% | 2369 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,411 psi | 39% | 1421 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,129 psi | 56% | 2362 fps | 96.8% |
| IMR 3031 | <<locked>> | 80% | 36,492 psi | 56% | 2415 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,520 psi | 55% | 2336 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,269 psi | 76% | 2556 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 47,108 psi | 72% | 2461 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 51,648 psi | 79% | 2625 fps | 95.6% |
| IMR 4831 | <<locked>> | 96% | 37,333 psi | 57% | 2457 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 33,895 psi | 52% | 2356 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 39,320 psi | 60% | 2415 fps | 98.3% |
| Lovex D073.4 | <<locked>> | 80% | 53,679 psi | 83% | 2641 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 43,845 psi | 67% | 2493 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 35,375 psi | 54% | 2375 fps | 98.8% |
| Lovex S060 | <<locked>> | 80% | 38,189 psi | 59% | 2349 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 32,793 psi | 50% | 2290 fps | 96.6% |
| Lovex S065 | <<locked>> | 96% | 44,208 psi | 68% | 2513 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 51,706 psi | 80% | 2543 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,260 psi | 56% | 2352 fps | 97.7% |
| Norma 202 | <<locked>> | 80% | 36,492 psi | 56% | 2372 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 32,518 psi | 50% | 2316 fps | 95% |
| Norma URP | <<locked>> | 96% | 39,247 psi | 60% | 2503 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 34,330 psi | 53% | 2375 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 41,814 psi | 64% | 2457 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,116 psi | 59% | 2425 fps | 96.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,641 psi | 66% | 2457 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,730 psi | 40% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,324 psi | 68% | 2500 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,297 psi | 73% | 2566 fps | 95.5% |
| ReloadSwiss RS 52 | 51.7 gr | 82% | 36,709 psi | 56% | 2467 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,311 psi | 44% | 2274 fps | 95.6% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 38,725 psi | 60% | 2520 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 42,801 psi | 66% | 2589 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 40,016 psi | 62% | 2408 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 34,621 psi | 53% | 2313 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 84% | 31,966 psi | 49% | 2310 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 53,679 psi | 83% | 2641 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 44,208 psi | 68% | 2513 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,375 psi | 54% | 2375 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 32,793 psi | 50% | 2290 fps | 96.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,804 psi | 72% | 2513 fps | 99.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,084 psi | 82% | 2290 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,400 psi | 76% | 2589 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 33,489 psi | 52% | 2359 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,847 psi | 72% | 2503 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 39,697 psi | 61% | 2428 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,839 psi | 55% | 2365 fps | 96.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,116 psi | 59% | 2329 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,154 psi | 48% | 2201 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 41,989 psi | 65% | 2484 fps | 99% |
| Somchem S335 | <<locked>> | 80% | 37,521 psi | 58% | 2333 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 36,738 psi | 57% | 2379 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 31,038 psi | 48% | 2270 fps | 95% |
| Somchem S365 | <<locked>> | 90% | 28,761 psi | 44% | 2293 fps | 95.1% |
| Vihtavuori N120 | <<locked>> | 80% | 53,664 psi | 83% | 2484 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,352 psi | 67% | 2398 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,290 psi | 59% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,388 psi | 51% | 2306 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,534 psi | 53% | 2313 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 27,630 psi | 43% | 2169 fps | 95.1% |
| Vihtavuori N160 | <<locked>> | 94% | 38,740 psi | 60% | 2454 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 39,088 psi | 60% | 2408 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 80% | 33,156 psi | 51% | 2300 fps | 98.7% |
| Vihtavuori N550 | <<locked>> | 96% | 40,364 psi | 62% | 2507 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 32,576 psi | 50% | 2293 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 38,072 psi | 59% | 2444 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,983 psi | 54% | 2365 fps | 96.5% |
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 104 powders for .338 Weatherby RPM loaded with the .338 | 210gr | Barnes TTSX BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,594 fps to 2,858 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 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 210.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 | 210gr | 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.