Load Specifications
Bullet:.338 | 250gr | Swift A-Frame
Bullet Manufacturer:Swift
Bullet Weight:250 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.33 Nosler load data
Case Length (l3):2.46"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:96 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:65,000 psi
Recommended Twist Rate:1:15.5
Load data in caliber .33 Nosler with .338 | 250gr | Swift A-Frame bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Hodgdon Superformance.
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 2495 | <<locked>> | 82% | 55,753 psi | 86% | 2500 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,811 psi | 87% | 2575 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,679 psi | 84% | 2625 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 56,376 psi | 87% | 2556 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,913 psi | 88% | 2661 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,753 psi | 87% | 2759 fps | 97.4% |
| ADI AR 2206H | <<locked>> | 82% | 58,436 psi | 90% | 2625 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,217 psi | 86% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,769 psi | 89% | 2710 fps | 99.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,259 psi | 85% | 2707 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,521 psi | 85% | 2703 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,884 psi | 88% | 2605 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,276 psi | 88% | 2628 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,653 psi | 89% | 2713 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,288 psi | 85% | 2687 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,000 psi | 88% | 2697 fps | 99.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,201 psi | 83% | 2703 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,372 psi | 79% | 2638 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,498 psi | 68% | 2575 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,810 psi | 84% | 2766 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 58,581 psi | 90% | 2648 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,705 psi | 76% | 2631 fps | 98.1% |
| Bofors RP3 | <<locked>> | 86% | 58,030 psi | 89% | 2625 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,201 psi | 83% | 2703 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 57,203 psi | 88% | 2615 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,280 psi | 68% | 2513 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 86% | 58,291 psi | 90% | 2641 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,419 psi | 85% | 2664 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 58,711 psi | 90% | 2674 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 98% | 55,434 psi | 85% | 2651 fps | 97.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 58,059 psi | 89% | 2690 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,943 psi | 89% | 2638 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,985 psi | 86% | 2625 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,729 psi | 67% | 2608 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 90% | 55,463 psi | 85% | 2700 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 56% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,536 psi | 87% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,724 psi | 86% | 2569 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 58,131 psi | 89% | 2605 fps | 99.8% |
| IMR 4350 | <<locked>> | 94% | 58,117 psi | 89% | 2648 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 58,697 psi | 90% | 2638 fps | 99.8% |
| IMR 4831 | <<locked>> | 94% | 57,203 psi | 88% | 2654 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 58,769 psi | 90% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,087 psi | 88% | 2641 fps | 97.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,707 psi | 81% | 2680 fps | 97.6% |
| Lovex S060 | <<locked>> | 82% | 57,159 psi | 88% | 2552 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,883 psi | 86% | 2562 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,332 psi | 85% | 2585 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 56,594 psi | 87% | 2628 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,426 psi | 70% | 2487 fps | 99.2% |
| Norma 201 | <<locked>> | 82% | 57,101 psi | 88% | 2569 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,972 psi | 89% | 2562 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,565 psi | 87% | 2615 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,361 psi | 85% | 2651 fps | 98.7% |
| Norma MRPᴾ | <<locked>> | 100% | 57,537 psi | 89% | 2779 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 55,419 psi | 85% | 2644 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,464 psi | 88% | 2644 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,156 psi | 82% | 2697 fps | 98% |
| Ramshot Hunter | <<locked>> | 94% | 57,943 psi | 89% | 2703 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,326 psi | 73% | 2582 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 57% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 58,030 psi | 89% | 2628 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 58,494 psi | 90% | 2694 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 58,769 psi | 90% | 2723 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,594 psi | 87% | 2684 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,071 psi | 85% | 2713 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,497 psi | 67% | 2605 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 84% | 57,769 psi | 89% | 2569 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 58,146 psi | 89% | 2618 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,869 psi | 86% | 2628 fps | 98% |
| Rottweil R 905 | <<locked>> | 98% | 56,260 psi | 87% | 2684 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 90% | 57,203 psi | 88% | 2615 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,332 psi | 85% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,883 psi | 86% | 2562 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,594 psi | 87% | 2628 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,869 psi | 86% | 2628 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,898 psi | 88% | 2598 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,798 psi | 89% | 2497 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,376 psi | 85% | 2464 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 58,726 psi | 90% | 2595 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,782 psi | 86% | 2680 fps | 99.1% |
| Somchem S335 | <<locked>> | 82% | 57,493 psi | 88% | 2497 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,798 psi | 89% | 2612 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,522 psi | 88% | 2625 fps | 97.6% |
| Somchem S365 | <<locked>> | 96% | 58,508 psi | 90% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,811 psi | 87% | 2661 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 82% | 58,349 psi | 90% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 58,291 psi | 90% | 2526 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 58,566 psi | 90% | 2546 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,724 psi | 86% | 2546 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,653 psi | 89% | 2641 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,649 psi | 81% | 2592 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 84% | 56,565 psi | 87% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,768 psi | 87% | 2648 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,363 psi | 88% | 2703 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,783 psi | 89% | 2772 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 46,122 psi | 71% | 2579 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,246 psi | 88% | 2612 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,637 psi | 86% | 2667 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,296 psi | 71% | 2697 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,116 psi | 88% | 2608 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,043 psi | 88% | 2657 fps | 99% |
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 2495 | <<locked>> | 80% | 52,373 psi | 81% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,009 psi | 77% | 2477 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 31,923 psi | 49% | 2224 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 49,661 psi | 76% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,014 psi | 58% | 2362 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 96% | 49,298 psi | 76% | 2644 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 55,085 psi | 85% | 2579 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,702 psi | 72% | 2448 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,233 psi | 60% | 2395 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 94% | 45,368 psi | 70% | 2539 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,619 psi | 79% | 2648 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,239 psi | 73% | 2467 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,546 psi | 78% | 2533 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,869 psi | 57% | 2369 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,771 psi | 64% | 2480 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,856 psi | 60% | 2388 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,943 psi | 60% | 2438 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,108 psi | 42% | 2152 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,603 psi | 47% | 2260 fps | 95.7% |
| Alliant Reloder-26 | 67 gr | 80% | 28,747 psi | 44% | 2251 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,781 psi | 84% | 2598 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 38,435 psi | 59% | 2425 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 47,572 psi | 73% | 2480 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,943 psi | 60% | 2438 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 41,901 psi | 64% | 2372 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 41,379 psi | 64% | 2457 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,935 psi | 74% | 2493 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,856 psi | 61% | 2405 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,699 psi | 66% | 2418 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 45,469 psi | 70% | 2493 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,616 psi | 73% | 2533 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,447 psi | 53% | 2270 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,243 psi | 80% | 2572 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,406 psi | 59% | 2490 fps | 95.7% |
| Hodgdon Superformance | 69.1 gr | 80% | 38,595 psi | 59% | 2411 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 42% | 1417 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,229 psi | 82% | 2543 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,110 psi | 76% | 2477 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,445 psi | 79% | 2510 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 37,521 psi | 58% | 2306 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,279 psi | 67% | 2398 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 36,550 psi | 56% | 2320 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 51,866 psi | 80% | 2559 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 44,585 psi | 69% | 2444 fps | 95% |
| IMR 7828 SSC | <<locked>> | 94% | 43,308 psi | 67% | 2516 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 53,867 psi | 83% | 2507 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,516 psi | 76% | 2474 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,872 psi | 63% | 2352 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 39,131 psi | 60% | 2339 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 31,096 psi | 48% | 2205 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 53,737 psi | 83% | 2523 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,331 psi | 84% | 2520 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,908 psi | 77% | 2523 fps | 100% |
| Norma 204 | <<locked>> | 82% | 39,523 psi | 61% | 2382 fps | 95.3% |
| Norma MRP | <<locked>> | 86% | 35,752 psi | 55% | 2395 fps | 96% |
| Norma URP | <<locked>> | 80% | 37,753 psi | 58% | 2356 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 50,082 psi | 77% | 2543 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,931 psi | 66% | 2520 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 36,506 psi | 56% | 2346 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 94% | 38,072 psi | 59% | 2408 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 43% | 1453 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,964 psi | 74% | 2480 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 54,694 psi | 84% | 2641 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,367 psi | 68% | 2526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,550 psi | 58% | 2375 fps | 98.8% |
| ReloadSwiss RS 70 | 66.4 gr | 80% | 36,434 psi | 56% | 2385 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,418 psi | 54% | 2418 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 51,198 psi | 79% | 2484 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,933 psi | 69% | 2434 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,323 psi | 67% | 2428 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 37,898 psi | 58% | 2375 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 41,901 psi | 64% | 2372 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,872 psi | 63% | 2352 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 49,516 psi | 76% | 2474 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,131 psi | 60% | 2339 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,977 psi | 71% | 2484 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,432 psi | 82% | 2556 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 54,592 psi | 84% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,195 psi | 71% | 2343 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,972 psi | 61% | 2303 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 37,536 psi | 58% | 2369 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 54,230 psi | 83% | 2457 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,165 psi | 69% | 2431 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,195 psi | 73% | 2470 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 34,142 psi | 53% | 2316 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 36,187 psi | 56% | 2313 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 55,143 psi | 85% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 51,663 psi | 79% | 2444 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,706 psi | 80% | 2461 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,163 psi | 66% | 2369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,160 psi | 60% | 2352 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 38,000 psi | 58% | 2343 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 49,835 psi | 77% | 2457 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,508 psi | 59% | 2356 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 29,863 psi | 46% | 2221 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 44,150 psi | 68% | 2546 fps | 95% |
| Vihtavuori N565 | <<locked>> | 98% | 43,091 psi | 66% | 2526 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,087 psi | 59% | 2326 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 40,016 psi | 62% | 2408 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,931 psi | 37% | 2133 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,577 psi | 82% | 2562 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,567 psi | 62% | 2398 fps | 95.8% |
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 102 powders for .33 Nosler loaded with the .338 | 250gr | Swift A-Frame. Norma MRP delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,779 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Reloder-26, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .33 Nosler with the .338 | 250gr | Swift A-Frame 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.