Load Specifications
Load data in caliber .33 Nosler with .338 | 250gr | Sako Hammerhead bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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% | 57,551 psi | 89% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 58,291 psi | 90% | 2605 fps | 99.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,739 psi | 87% | 2657 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,827 psi | 89% | 2582 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,071 psi | 85% | 2648 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,897 psi | 84% | 2743 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 86% | 57,638 psi | 89% | 2615 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,811 psi | 86% | 2694 fps | 99.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,101 psi | 88% | 2746 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,782 psi | 57% | 2434 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 57,348 psi | 88% | 2736 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 58,668 psi | 90% | 2635 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 58,784 psi | 90% | 2657 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,811 psi | 86% | 2697 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,246 psi | 88% | 2717 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 58,740 psi | 90% | 2733 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 2743 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,258 psi | 82% | 2667 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,166 psi | 71% | 2612 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 57,464 psi | 88% | 2808 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,619 psi | 79% | 2671 fps | 98.6% |
| Bofors RP3 | <<locked>> | 84% | 55,869 psi | 86% | 2605 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,148 psi | 65% | 2543 fps | 96% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,231 psi | 87% | 2743 fps | 99.3% |
| Bofors RP7 | <<locked>> | 90% | 58,711 psi | 90% | 2648 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,730 psi | 70% | 2556 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 84% | 56,289 psi | 87% | 2625 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,130 psi | 88% | 2697 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 88% | 56,782 psi | 87% | 2657 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 98% | 57,319 psi | 88% | 2690 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,101 psi | 86% | 2674 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,246 psi | 87% | 2625 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,508 psi | 88% | 2651 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,281 psi | 70% | 2654 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 90% | 57,508 psi | 88% | 2736 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 56% | 1604 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 58,030 psi | 89% | 2615 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 57,043 psi | 88% | 2595 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,956 psi | 86% | 2589 fps | 99.8% |
| IMR 4350 | <<locked>> | 92% | 56,130 psi | 86% | 2631 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,811 psi | 87% | 2625 fps | 99.8% |
| IMR 4831 | <<locked>> | 92% | 55,361 psi | 85% | 2638 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,710 psi | 87% | 2635 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 58,697 psi | 90% | 2677 fps | 98.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,578 psi | 84% | 2723 fps | 98.1% |
| Lovex S060 | <<locked>> | 82% | 58,421 psi | 90% | 2579 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 57,450 psi | 88% | 2592 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,840 psi | 87% | 2618 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 58,291 psi | 90% | 2661 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,195 psi | 73% | 2523 fps | 99.5% |
| Norma 201 | <<locked>> | 82% | 58,697 psi | 90% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 84% | 58,073 psi | 89% | 2644 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,956 psi | 88% | 2684 fps | 99.1% |
| Norma MRP | <<locked>> | 98% | 55,999 psi | 86% | 2766 fps | 99.9% |
| Norma URP | <<locked>> | 92% | 57,261 psi | 88% | 2680 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,288 psi | 85% | 2625 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,158 psi | 85% | 2740 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,970 psi | 86% | 2687 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,153 psi | 76% | 2621 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 58% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,985 psi | 86% | 2612 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,710 psi | 87% | 2707 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,926 psi | 85% | 2671 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,913 psi | 88% | 2746 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,179 psi | 70% | 2651 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 82% | 55,782 psi | 86% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,173 psi | 86% | 2605 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,624 psi | 89% | 2667 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 98% | 58,334 psi | 90% | 2723 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 90% | 58,711 psi | 90% | 2648 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,840 psi | 87% | 2618 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 57,450 psi | 88% | 2592 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 58,291 psi | 90% | 2661 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,682 psi | 89% | 2661 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 58,291 psi | 90% | 2628 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,884 psi | 88% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,579 psi | 87% | 2579 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 57,856 psi | 89% | 2720 fps | 99.4% |
| Somchem S355 | <<locked>> | 86% | 55,941 psi | 86% | 2598 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,651 psi | 86% | 2612 fps | 97.5% |
| Somchem S365 | <<locked>> | 94% | 56,840 psi | 87% | 2680 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 58,813 psi | 90% | 2697 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 56,347 psi | 87% | 2510 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,478 psi | 87% | 2530 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,101 psi | 88% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,738 psi | 86% | 2625 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,505 psi | 84% | 2625 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 84% | 58,146 psi | 89% | 2572 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 58,392 psi | 90% | 2677 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,854 psi | 86% | 2694 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,188 psi | 86% | 2759 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,935 psi | 74% | 2618 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,143 psi | 85% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,363 psi | 88% | 2700 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,718 psi | 75% | 2736 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 58,784 psi | 90% | 2638 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,027 psi | 85% | 2641 fps | 98.9% |
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 2495 | <<locked>> | 80% | 53,940 psi | 83% | 2487 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,300 psi | 79% | 2510 fps | 99% |
| Accurate 3100 | <<locked>> | 82% | 30,980 psi | 48% | 2208 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 51,140 psi | 79% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,334 psi | 61% | 2395 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 94% | 47,761 psi | 73% | 2628 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,979 psi | 74% | 2477 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,855 psi | 58% | 2375 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 43,772 psi | 67% | 2523 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 34,592 psi | 53% | 2379 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,447 psi | 82% | 2680 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,573 psi | 75% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,924 psi | 80% | 2562 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,072 psi | 59% | 2402 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,207 psi | 66% | 2513 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,666 psi | 58% | 2375 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,884 psi | 58% | 2421 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,065 psi | 43% | 2188 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,718 psi | 46% | 2244 fps | 95.4% |
| Alliant Reloder-26 | 69.1 gr | 80% | 29,892 psi | 46% | 2290 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 37,391 psi | 58% | 2411 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,139 psi | 76% | 2513 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,363 psi | 61% | 2484 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 37,884 psi | 58% | 2421 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,062 psi | 66% | 2402 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 40,103 psi | 62% | 2444 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 49,371 psi | 76% | 2526 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,205 psi | 63% | 2438 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,063 psi | 68% | 2454 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 92% | 46,847 psi | 72% | 2530 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 45,934 psi | 71% | 2513 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,694 psi | 55% | 2303 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,795 psi | 83% | 2605 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,289 psi | 57% | 2477 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,045 psi | 62% | 2451 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 42% | 1430 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,534 psi | 84% | 2569 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,488 psi | 78% | 2507 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,605 psi | 81% | 2536 fps | 99.5% |
| IMR 4350 | <<locked>> | 80% | 38,595 psi | 59% | 2336 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,396 psi | 68% | 2428 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 37,739 psi | 58% | 2352 fps | 99.2% |
| IMR 4895 | <<locked>> | 80% | 53,258 psi | 82% | 2589 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 45,803 psi | 70% | 2474 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 44,802 psi | 69% | 2556 fps | 95.9% |
| Lovex S060 | <<locked>> | 80% | 54,926 psi | 85% | 2533 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,705 psi | 78% | 2500 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,003 psi | 65% | 2385 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 40,277 psi | 62% | 2372 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,356 psi | 47% | 2192 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 55,158 psi | 85% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,271 psi | 79% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,145 psi | 59% | 2365 fps | 95% |
| Norma MRP | 70.4 gr | 84% | 34,519 psi | 53% | 2375 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,001 psi | 60% | 2388 fps | 99.3% |
| Ramshot Big Game | <<locked>> | 80% | 51,721 psi | 80% | 2575 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,568 psi | 64% | 2507 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,768 psi | 58% | 2379 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 92% | 36,840 psi | 57% | 2392 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 43% | 1467 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,284 psi | 76% | 2513 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,890 psi | 71% | 2556 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,088 psi | 60% | 2415 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,695 psi | 58% | 2421 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,301 psi | 53% | 2402 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 52,634 psi | 81% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,296 psi | 71% | 2464 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,901 psi | 64% | 2411 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 36,796 psi | 57% | 2359 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,062 psi | 66% | 2402 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,003 psi | 65% | 2385 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 50,705 psi | 78% | 2500 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,277 psi | 62% | 2372 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,398 psi | 73% | 2516 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,839 psi | 84% | 2582 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,311 psi | 73% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,017 psi | 63% | 2333 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 38,972 psi | 60% | 2405 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 46,499 psi | 72% | 2464 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,614 psi | 70% | 2454 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,404 psi | 54% | 2349 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,056 psi | 54% | 2293 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 53,011 psi | 82% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,055 psi | 82% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,396 psi | 68% | 2395 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,364 psi | 62% | 2385 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 36,753 psi | 57% | 2326 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 51,242 psi | 79% | 2484 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,798 psi | 61% | 2388 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,082 psi | 48% | 2254 fps | 98% |
| Vihtavuori N560 | 77.1 gr | 92% | 45,745 psi | 70% | 2589 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 44,904 psi | 69% | 2566 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,334 psi | 61% | 2356 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,205 psi | 63% | 2438 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,787 psi | 38% | 2172 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,027 psi | 85% | 2589 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,088 psi | 60% | 2379 fps | 95.6% |
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 97 powders for .33 Nosler loaded with the .338 | 250gr | Sako Hammerhead. Alliant Reloder-26 delivers the highest muzzle velocity at 2,808 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,808 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 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 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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, Norma MRP, Vihtavuori N560 rank at the top here: for .33 Nosler with the .338 | 250gr | Sako Hammerhead 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.