Load Specifications
Load data in caliber .338 Blaser Mag. with .338 | 200gr | Nosler AccuBond bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Superformance, ReloadSwiss RS 60 and Alliant Reloder-17.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 54,766 psi | 90% | 2769 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,432 psi | 88% | 2795 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,114 psi | 90% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,591 psi | 86% | 2789 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,451 psi | 66% | 2684 fps | 95.9% |
| Accurate 4064 | <<locked>> | 90% | 53,359 psi | 88% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,953 psi | 87% | 2923 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 53,867 psi | 88% | 2874 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,969 psi | 90% | 2874 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 52,823 psi | 87% | 2825 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,635 psi | 88% | 2799 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,243 psi | 87% | 2989 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,679 psi | 90% | 2894 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 52,069 psi | 85% | 2864 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,143 psi | 89% | 2979 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,793 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,870 psi | 64% | 2717 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,221 psi | 71% | 2871 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,650 psi | 88% | 2890 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 51,880 psi | 85% | 2858 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,127 psi | 86% | 2825 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,679 psi | 90% | 2808 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 52,156 psi | 86% | 2854 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,867 psi | 88% | 2949 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 52,808 psi | 87% | 2867 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 52,373 psi | 86% | 2920 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 53,156 psi | 87% | 2881 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 54,375 psi | 89% | 2884 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,589 psi | 83% | 2854 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,722 psi | 88% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,779 psi | 87% | 2949 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,534 psi | 58% | 1755 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,214 psi | 86% | 2835 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,418 psi | 89% | 2867 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,331 psi | 89% | 2854 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,331 psi | 89% | 2835 fps | 97.8% |
| IMR 4350 | <<locked>> | 98% | 52,359 psi | 86% | 2851 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,070 psi | 89% | 2858 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,490 psi | 88% | 2913 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 53,359 psi | 88% | 2897 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 52,823 psi | 87% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,417 psi | 88% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,563 psi | 88% | 2802 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,288 psi | 89% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,447 psi | 88% | 2854 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 54,186 psi | 89% | 2887 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 52,620 psi | 86% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,229 psi | 87% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,679 psi | 90% | 2907 fps | 100% |
| Norma URP | <<locked>> | 98% | 52,054 psi | 85% | 2910 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 55,100 psi | 90% | 2930 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,418 psi | 89% | 2959 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 53,098 psi | 87% | 2841 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,678 psi | 86% | 2861 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,621 psi | 88% | 2822 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 59% | 1795 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,330 psi | 88% | 2851 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,228 psi | 86% | 2930 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,735 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,605 psi | 86% | 2946 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,286 psi | 86% | 2969 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 53,679 psi | 88% | 2802 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,055 psi | 87% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 51,750 psi | 85% | 2851 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,127 psi | 86% | 2825 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,447 psi | 88% | 2854 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,417 psi | 88% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,288 psi | 89% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,186 psi | 89% | 2887 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,519 psi | 88% | 2913 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,969 psi | 90% | 2871 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,301 psi | 86% | 2844 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,099 psi | 89% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,201 psi | 89% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,766 psi | 88% | 2805 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 54,070 psi | 89% | 2858 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,534 psi | 88% | 2756 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,723 psi | 90% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 52,286 psi | 86% | 2851 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,995 psi | 82% | 2913 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,867 psi | 88% | 2717 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,331 psi | 89% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,707 psi | 87% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,722 psi | 88% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,635 psi | 88% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,592 psi | 90% | 2907 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 53,330 psi | 88% | 2822 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,866 psi | 85% | 2795 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,693 psi | 88% | 2913 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,322 psi | 69% | 2792 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,998 psi | 90% | 2884 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,084 psi | 87% | 2871 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,373 psi | 86% | 2920 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,722 psi | 57% | 2713 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,112 psi | 86% | 2851 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% | 48,443 psi | 80% | 2680 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,191 psi | 68% | 2608 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,138 psi | 79% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,122 psi | 76% | 2680 fps | 95.2% |
| Accurate 3100 | <<locked>> | 98% | 37,710 psi | 62% | 2625 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,928 psi | 64% | 2602 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,547 psi | 53% | 2526 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 44,701 psi | 73% | 2717 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,898 psi | 62% | 2562 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,731 psi | 77% | 2723 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,920 psi | 77% | 2703 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,451 psi | 66% | 2743 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,550 psi | 62% | 2589 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,379 psi | 66% | 2651 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,098 psi | 54% | 2539 fps | 95.2% |
| Alliant Reloder-17 | 62.2 gr | 80% | 32,460 psi | 53% | 2556 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,400 psi | 50% | 2497 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,157 psi | 58% | 2680 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,845 psi | 72% | 2720 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 37,159 psi | 61% | 2592 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 46,035 psi | 76% | 2717 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,486 psi | 80% | 2710 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,484 psi | 75% | 2743 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,212 psi | 82% | 2890 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 37,942 psi | 62% | 2592 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 42,859 psi | 70% | 2746 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 49,908 psi | 82% | 2828 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 45,092 psi | 74% | 2726 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,529 psi | 47% | 2388 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,959 psi | 67% | 2697 fps | 99.4% |
| Hodgdon Superformance | 75.6 gr | 92% | 45,919 psi | 75% | 2828 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 43% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,250 psi | 71% | 2677 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,773 psi | 74% | 2720 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,784 psi | 65% | 2598 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,221 psi | 69% | 2615 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 46,296 psi | 76% | 2749 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,293 psi | 69% | 2648 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 33,881 psi | 56% | 2539 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 41,379 psi | 68% | 2684 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,731 psi | 77% | 2723 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,830 psi | 72% | 2697 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,701 psi | 73% | 2651 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 39,842 psi | 65% | 2605 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 37,028 psi | 61% | 2543 fps | 95% |
| Lovex S070 | <<locked>> | 90% | 42,192 psi | 69% | 2674 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 43,758 psi | 72% | 2667 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 44,034 psi | 72% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,769 psi | 65% | 2641 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 32,982 psi | 54% | 2530 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,160 psi | 64% | 2651 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 39,175 psi | 64% | 2677 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,586 psi | 76% | 2730 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,064 psi | 76% | 2749 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,430 psi | 83% | 2772 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,818 psi | 44% | 1608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,075 psi | 67% | 2631 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,395 psi | 70% | 2756 fps | 98.6% |
| ReloadSwiss RS 60 | 62.2 gr | 80% | 34,548 psi | 57% | 2621 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,766 psi | 57% | 2602 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,289 psi | 61% | 2664 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 47,703 psi | 78% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,524 psi | 68% | 2618 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 34,954 psi | 57% | 2533 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 46,035 psi | 76% | 2717 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,028 psi | 61% | 2543 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,830 psi | 72% | 2697 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,842 psi | 65% | 2605 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 42,192 psi | 69% | 2674 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,926 psi | 59% | 2585 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,918 psi | 74% | 2703 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,134 psi | 71% | 2684 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,962 psi | 74% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,405 psi | 61% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,092 psi | 72% | 2644 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 50,531 psi | 83% | 2805 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,701 psi | 73% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,657 psi | 73% | 2700 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 35,882 psi | 59% | 2543 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 25,991 psi | 43% | 2365 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 50,720 psi | 83% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,295 psi | 74% | 2608 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,017 psi | 67% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,597 psi | 68% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,055 psi | 56% | 2477 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,505 psi | 57% | 2533 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 46,760 psi | 77% | 2717 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,030 psi | 66% | 2598 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,997 psi | 56% | 2533 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 30,603 psi | 50% | 2520 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,269 psi | 50% | 2402 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 46,354 psi | 76% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,047 psi | 71% | 2753 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,645 psi | 47% | 2516 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,598 psi | 70% | 2690 fps | 99.4% |
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 95 powders for .338 Blaser Mag. loaded with the .338 | 200gr | Nosler AccuBond. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,989 fps; across all powders the maximum-charge window runs from 1,755 fps to 2,989 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 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 200.0 gr projectile in 0.338" calls for a 1:14.5 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. Hodgdon Superformance, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .338 Blaser Mag. with the .338 | 200gr | Nosler AccuBond 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.