Load Specifications
Bullet Manufacturer:Sierra
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:1:14.0
Load data in caliber .33 Nosler with .338 | 250gr | Sierra GameKing bullet and 103 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.
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 2495 | <<locked>> | 84% | 58,552 psi | 90% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,319 psi | 88% | 2569 fps | 99.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,548 psi | 82% | 2602 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 55,376 psi | 85% | 2539 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,811 psi | 86% | 2644 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,783 psi | 89% | 2612 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,376 psi | 85% | 2572 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,695 psi | 87% | 2687 fps | 99% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,302 psi | 84% | 2684 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 58,479 psi | 90% | 2736 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,246 psi | 87% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,391 psi | 87% | 2612 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,594 psi | 87% | 2694 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,117 psi | 89% | 2720 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,883 psi | 86% | 2677 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,127 psi | 82% | 2684 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,227 psi | 77% | 2618 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,656 psi | 67% | 2556 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,725 psi | 89% | 2802 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,537 psi | 89% | 2631 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,646 psi | 75% | 2612 fps | 97.9% |
| Bofors RP3 | <<locked>> | 86% | 56,913 psi | 88% | 2605 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,127 psi | 82% | 2684 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 56,246 psi | 87% | 2598 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 57,493 psi | 88% | 2628 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 58,131 psi | 89% | 2697 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 90% | 57,740 psi | 89% | 2654 fps | 99.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,262 psi | 90% | 2687 fps | 97.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,029 psi | 88% | 2671 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 58,436 psi | 90% | 2618 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,913 psi | 88% | 2621 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,114 psi | 85% | 2608 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,859 psi | 66% | 2585 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 92% | 58,479 psi | 90% | 2736 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 56% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,869 psi | 86% | 2572 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 58,349 psi | 90% | 2598 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,392 psi | 88% | 2589 fps | 99.7% |
| IMR 4350 | <<locked>> | 94% | 57,217 psi | 88% | 2631 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,972 psi | 89% | 2621 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 56,217 psi | 86% | 2635 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,841 psi | 89% | 2638 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,115 psi | 86% | 2621 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,721 psi | 80% | 2661 fps | 97.3% |
| Lovex D073.6 | <<locked>> | 82% | 58,320 psi | 90% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,492 psi | 87% | 2536 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 58,450 psi | 90% | 2589 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,986 psi | 89% | 2618 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 55,927 psi | 86% | 2612 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,512 psi | 68% | 2470 fps | 99% |
| Norma 201 | <<locked>> | 82% | 56,405 psi | 87% | 2556 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,029 psi | 88% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,666 psi | 86% | 2598 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,044 psi | 89% | 2684 fps | 99% |
| Norma MRPᴾ | <<locked>> | 100% | 56,405 psi | 87% | 2759 fps | 99.8% |
| Norma URP | <<locked>> | 94% | 58,160 psi | 89% | 2677 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,420 psi | 87% | 2625 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,909 psi | 80% | 2671 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 94% | 56,797 psi | 87% | 2684 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,282 psi | 71% | 2559 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 57% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,319 psi | 88% | 2615 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,493 psi | 88% | 2677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,624 psi | 89% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,593 psi | 86% | 2667 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,030 psi | 89% | 2749 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,583 psi | 66% | 2579 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 84% | 57,101 psi | 88% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,043 psi | 88% | 2602 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 58,537 psi | 90% | 2661 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 98% | 55,303 psi | 85% | 2667 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 90% | 56,246 psi | 87% | 2598 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,986 psi | 89% | 2618 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 58,320 psi | 90% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 58,450 psi | 90% | 2589 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,927 psi | 86% | 2612 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,755 psi | 90% | 2661 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,057 psi | 86% | 2585 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,087 psi | 88% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 58,059 psi | 89% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,841 psi | 89% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,508 psi | 90% | 2710 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 56,840 psi | 87% | 2484 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 58,595 psi | 90% | 2602 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,971 psi | 88% | 2598 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,608 psi | 87% | 2605 fps | 97.3% |
| Somchem S365 | <<locked>> | 96% | 57,464 psi | 88% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,782 psi | 86% | 2641 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 57,580 psi | 89% | 2464 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,508 psi | 88% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,653 psi | 89% | 2530 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 58,189 psi | 90% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,652 psi | 87% | 2621 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,634 psi | 79% | 2569 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 84% | 55,753 psi | 86% | 2530 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,782 psi | 86% | 2631 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,333 psi | 87% | 2687 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,768 psi | 87% | 2753 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,246 psi | 87% | 2595 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 58,131 psi | 89% | 2697 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,368 psi | 70% | 2677 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,304 psi | 87% | 2595 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,970 psi | 86% | 2638 fps | 98.8% |
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 2495 | <<locked>> | 80% | 51,590 psi | 79% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,309 psi | 68% | 2372 fps | 97.5% |
| Accurate 3100 | <<locked>> | 84% | 31,256 psi | 48% | 2205 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,921 psi | 75% | 2454 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,173 psi | 57% | 2343 fps | 98.9% |
| ADI AR 2206H | <<locked>> | 80% | 54,143 psi | 83% | 2562 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 46,035 psi | 71% | 2431 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 41,089 psi | 63% | 2428 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 44,454 psi | 68% | 2516 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,734 psi | 78% | 2631 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,543 psi | 72% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,676 psi | 76% | 2516 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,274 psi | 56% | 2352 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,988 psi | 63% | 2464 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,218 psi | 59% | 2372 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,189 psi | 59% | 2418 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,643 psi | 41% | 2136 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,081 psi | 46% | 2244 fps | 95.2% |
| Alliant Reloder-26 | 65.9 gr | 80% | 28,210 psi | 43% | 2234 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,969 psi | 83% | 2582 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 40,277 psi | 62% | 2457 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 46,876 psi | 72% | 2467 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,189 psi | 59% | 2418 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 41,321 psi | 64% | 2356 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 47,311 psi | 73% | 2480 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,102 psi | 60% | 2385 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 42,134 psi | 65% | 2405 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 47,645 psi | 73% | 2526 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,659 psi | 72% | 2510 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 54,781 psi | 84% | 2569 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,823 psi | 52% | 2254 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,561 psi | 79% | 2559 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 37,724 psi | 58% | 2470 fps | 95.2% |
| Hodgdon Superformance | 68 gr | 80% | 38,000 psi | 58% | 2395 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 42% | 1414 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,344 psi | 81% | 2526 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,443 psi | 75% | 2461 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,647 psi | 78% | 2490 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 36,985 psi | 57% | 2290 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,728 psi | 66% | 2382 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 35,766 psi | 55% | 2300 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 50,966 psi | 78% | 2543 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,543 psi | 72% | 2474 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 45,339 psi | 70% | 2549 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 80% | 54,563 psi | 84% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 53,214 psi | 82% | 2493 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,820 psi | 75% | 2461 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,292 psi | 62% | 2339 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 38,537 psi | 59% | 2323 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 30,429 psi | 47% | 2185 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 53,040 psi | 82% | 2510 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,606 psi | 82% | 2503 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,037 psi | 75% | 2503 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,553 psi | 64% | 2418 fps | 95.8% |
| Norma MRP | <<locked>> | 86% | 35,012 psi | 54% | 2375 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 37,101 psi | 57% | 2339 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,255 psi | 76% | 2526 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,177 psi | 65% | 2500 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 35,795 psi | 55% | 2326 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 37,449 psi | 58% | 2388 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 43% | 1447 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,239 psi | 73% | 2464 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,708 psi | 83% | 2625 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,569 psi | 67% | 2510 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,956 psi | 57% | 2362 fps | 98.6% |
| ReloadSwiss RS 70 | 65.3 gr | 80% | 35,810 psi | 55% | 2365 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,577 psi | 53% | 2392 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 50,488 psi | 78% | 2467 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,266 psi | 68% | 2421 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,670 psi | 66% | 2408 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 39,697 psi | 61% | 2405 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 41,321 psi | 64% | 2356 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,292 psi | 62% | 2339 fps | 98.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,563 psi | 84% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,820 psi | 75% | 2461 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,537 psi | 59% | 2323 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,194 psi | 70% | 2467 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,562 psi | 81% | 2536 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,824 psi | 83% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,498 psi | 70% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,421 psi | 61% | 2290 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,320 psi | 60% | 2402 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 53,577 psi | 82% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,897 psi | 84% | 2556 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,498 psi | 68% | 2418 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,499 psi | 72% | 2454 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 33,504 psi | 52% | 2300 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,520 psi | 55% | 2293 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 54,375 psi | 84% | 2428 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,836 psi | 78% | 2431 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,024 psi | 78% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,525 psi | 65% | 2356 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,377 psi | 59% | 2336 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 37,217 psi | 57% | 2323 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 49,226 psi | 76% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,913 psi | 58% | 2339 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 29,269 psi | 45% | 2205 fps | 97.2% |
| Vihtavuori N560 | <<locked>> | 94% | 46,369 psi | 71% | 2585 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,492 psi | 58% | 2310 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 39,247 psi | 60% | 2388 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,453 psi | 36% | 2110 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,736 psi | 81% | 2546 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,784 psi | 61% | 2379 fps | 95.4% |
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 103 powders for .33 Nosler loaded with the .338 | 250gr | Sierra GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,581 fps to 2,802 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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 | Sierra GameKing 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.