Load Specifications
Load data in caliber .338 Blaser Mag. with .338 | 225gr | Nosler Expansion Tip 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 Reloder-17, ReloadSwiss RS 60 and Winchester 760.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 54,636 psi | 90% | 2589 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,910 psi | 87% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,056 psi | 90% | 2680 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,736 psi | 87% | 2625 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,089 psi | 66% | 2523 fps | 96.8% |
| Accurate 4064 | <<locked>> | 90% | 53,113 psi | 87% | 2661 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,765 psi | 87% | 2746 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 54,070 psi | 89% | 2697 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,969 psi | 90% | 2697 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,113 psi | 87% | 2648 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,896 psi | 88% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,577 psi | 88% | 2815 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,027 psi | 90% | 2717 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,011 psi | 85% | 2690 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,418 psi | 89% | 2802 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,156 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,580 psi | 63% | 2556 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,120 psi | 71% | 2713 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,795 psi | 88% | 2713 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 51,851 psi | 85% | 2684 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,243 psi | 86% | 2661 fps | 97.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,824 psi | 90% | 2631 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,243 psi | 86% | 2677 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,230 psi | 89% | 2772 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 52,953 psi | 87% | 2697 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 52,504 psi | 86% | 2749 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 94% | 53,403 psi | 88% | 2713 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,621 psi | 90% | 2707 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2684 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,824 psi | 88% | 2736 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,040 psi | 87% | 2785 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 58% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,518 psi | 86% | 2661 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,389 psi | 89% | 2680 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,563 psi | 90% | 2680 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,462 psi | 89% | 2664 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 52,562 psi | 86% | 2687 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,201 psi | 89% | 2690 fps | 98.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,635 psi | 88% | 2740 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 53,345 psi | 88% | 2717 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,113 psi | 87% | 2648 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,563 psi | 88% | 2671 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,577 psi | 88% | 2625 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,085 psi | 89% | 2674 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,345 psi | 88% | 2680 fps | 99.3% |
| Lovex S070 | <<locked>> | 98% | 54,186 psi | 89% | 2717 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 52,678 psi | 86% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,258 psi | 87% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,636 psi | 90% | 2726 fps | 100% |
| Norma 204 | <<locked>> | 98% | 53,084 psi | 87% | 2733 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 43,163 psi | 71% | 2671 fps | 96.4% |
| Norma URP | <<locked>> | 98% | 52,228 psi | 86% | 2736 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 51,706 psi | 85% | 2703 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,607 psi | 90% | 2789 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 53,142 psi | 87% | 2671 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,678 psi | 86% | 2684 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,766 psi | 88% | 2651 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 59% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,229 psi | 87% | 2680 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,431 psi | 86% | 2753 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,866 psi | 85% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,692 psi | 87% | 2772 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,562 psi | 86% | 2802 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 53,519 psi | 88% | 2621 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,185 psi | 87% | 2641 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,663 psi | 85% | 2674 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,243 psi | 86% | 2661 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,345 psi | 88% | 2680 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,563 psi | 88% | 2671 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,085 psi | 89% | 2674 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,186 psi | 89% | 2717 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,708 psi | 88% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 51,459 psi | 84% | 2648 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,417 psi | 86% | 2671 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,230 psi | 89% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,360 psi | 89% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,621 psi | 88% | 2638 fps | 98.4% |
| Somchem S321 | <<locked>> | 82% | 54,041 psi | 89% | 2677 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,650 psi | 88% | 2582 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,853 psi | 90% | 2690 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 52,156 psi | 86% | 2674 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,198 psi | 82% | 2740 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,543 psi | 76% | 2628 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 82% | 54,041 psi | 89% | 2543 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,549 psi | 90% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,837 psi | 87% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,853 psi | 88% | 2621 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,693 psi | 88% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,679 psi | 90% | 2733 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 53,432 psi | 88% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,982 psi | 85% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,650 psi | 88% | 2740 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,351 psi | 70% | 2628 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 51,459 psi | 84% | 2664 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,388 psi | 88% | 2694 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,750 psi | 87% | 2753 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,476 psi | 57% | 2566 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,185 psi | 86% | 2677 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 48,327 psi | 79% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,553 psi | 67% | 2434 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,008 psi | 79% | 2582 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,250 psi | 71% | 2470 fps | 95.5% |
| Accurate 3100 | <<locked>> | 96% | 34,925 psi | 57% | 2421 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,377 psi | 63% | 2434 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,066 psi | 49% | 2320 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 44,556 psi | 73% | 2549 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 37,927 psi | 62% | 2408 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,717 psi | 77% | 2552 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,079 psi | 77% | 2530 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,509 psi | 67% | 2585 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,405 psi | 61% | 2428 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,234 psi | 66% | 2490 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,908 psi | 51% | 2339 fps | 95.5% |
| Alliant Reloder-17 | 58 gr | 80% | 32,213 psi | 53% | 2405 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 26,542 psi | 44% | 2247 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 92% | 32,518 psi | 53% | 2470 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,787 psi | 72% | 2556 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 36,898 psi | 61% | 2431 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 40,640 psi | 67% | 2457 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,530 psi | 80% | 2539 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,426 psi | 75% | 2575 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,502 psi | 83% | 2720 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 37,840 psi | 62% | 2438 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 40,045 psi | 66% | 2533 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 88% | 43,976 psi | 72% | 2559 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 44,976 psi | 74% | 2559 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,440 psi | 43% | 2192 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,089 psi | 67% | 2536 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 42,728 psi | 70% | 2605 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 43% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,192 psi | 71% | 2513 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 44,657 psi | 73% | 2546 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,813 psi | 65% | 2441 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,192 psi | 69% | 2457 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 40,814 psi | 67% | 2487 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 39,827 psi | 65% | 2444 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 29,370 psi | 48% | 2283 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,220 psi | 68% | 2516 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 46,717 psi | 77% | 2552 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,642 psi | 72% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,643 psi | 73% | 2487 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 39,566 psi | 65% | 2441 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 34,577 psi | 57% | 2343 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 39,566 psi | 65% | 2467 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 43,482 psi | 71% | 2500 fps | 100% |
| Norma 202 | <<locked>> | 80% | 43,947 psi | 72% | 2507 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,581 psi | 65% | 2477 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 46,195 psi | 76% | 2621 fps | 95.1% |
| Norma MRP | <<locked>> | 98% | 40,408 psi | 66% | 2615 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 30,806 psi | 51% | 2329 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,189 psi | 64% | 2493 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 36,666 psi | 60% | 2470 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 46,499 psi | 76% | 2566 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,137 psi | 76% | 2582 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,299 psi | 83% | 2598 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 44% | 1486 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,261 psi | 63% | 2421 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,467 psi | 70% | 2589 fps | 99.2% |
| ReloadSwiss RS 60 | 58 gr | 80% | 34,345 psi | 56% | 2467 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,126 psi | 53% | 2392 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,679 psi | 57% | 2454 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 47,253 psi | 78% | 2530 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,350 psi | 68% | 2454 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 34,679 psi | 57% | 2379 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 40,640 psi | 67% | 2457 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 34,577 psi | 57% | 2343 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,642 psi | 72% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,566 psi | 65% | 2441 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 39,566 psi | 65% | 2467 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,810 psi | 59% | 2428 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,701 psi | 73% | 2539 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,062 psi | 71% | 2520 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,020 psi | 74% | 2451 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,420 psi | 61% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 38,551 psi | 63% | 2388 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 50,444 psi | 83% | 2628 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,527 psi | 73% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,585 psi | 73% | 2536 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 35,621 psi | 58% | 2385 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 25,657 psi | 42% | 2228 fps | 96.6% |
| Somchem S385 | <<locked>> | 96% | 40,683 psi | 67% | 2523 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 50,894 psi | 84% | 2503 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,426 psi | 75% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,988 psi | 67% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,611 psi | 68% | 2444 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,866 psi | 56% | 2326 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 32,184 psi | 53% | 2329 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 46,789 psi | 77% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,001 psi | 66% | 2438 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 31,546 psi | 52% | 2329 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 28,253 psi | 46% | 2316 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,965 psi | 49% | 2257 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 46,572 psi | 76% | 2595 fps | 100% |
| Winchester 760 | 62.5 gr | 88% | 40,248 psi | 66% | 2536 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 26,513 psi | 44% | 2316 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,554 psi | 70% | 2526 fps | 99.7% |
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 Blaser Mag. loaded with the .338 | 225gr | Nosler Expansion Tip. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,815 fps. Accurate 3100 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 (420 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-16, Alliant Reloder-23 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-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for .338 Blaser Mag. with the .338 | 225gr | Nosler Expansion Tip 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.