Load Specifications
Load data in caliber .338 Blaser Mag. with .338 | 200gr | Reichenberg HDB Universal bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 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% | 54,447 psi | 89% | 2779 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,576 psi | 86% | 2799 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,868 psi | 90% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 52,518 psi | 86% | 2805 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,958 psi | 66% | 2687 fps | 95.9% |
| Accurate 4064 | <<locked>> | 90% | 52,750 psi | 87% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 52,649 psi | 86% | 2933 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 53,766 psi | 88% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,694 psi | 90% | 2884 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 52,663 psi | 86% | 2835 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 53,519 psi | 88% | 2808 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,345 psi | 88% | 3005 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,752 psi | 90% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 51,895 psi | 85% | 2877 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,418 psi | 89% | 2995 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 51,938 psi | 85% | 2979 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,522 psi | 63% | 2723 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,120 psi | 71% | 2887 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 53,519 psi | 88% | 2900 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 55,027 psi | 90% | 2920 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 52,040 psi | 85% | 2838 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,563 psi | 90% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 51,938 psi | 85% | 2864 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,853 psi | 88% | 2963 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 52,765 psi | 87% | 2884 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 96% | 52,301 psi | 86% | 2933 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 94% | 53,185 psi | 87% | 2897 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 54,317 psi | 89% | 2897 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,531 psi | 83% | 2867 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 53,577 psi | 88% | 2927 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 52,924 psi | 87% | 2969 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,215 psi | 58% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 52,025 psi | 85% | 2844 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,230 psi | 89% | 2877 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,317 psi | 89% | 2867 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,244 psi | 89% | 2848 fps | 98% |
| IMR 4350 | <<locked>> | 98% | 52,272 psi | 86% | 2864 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,925 psi | 89% | 2871 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 53,330 psi | 88% | 2927 fps | 99.7% |
| IMR 4895 | <<locked>> | 88% | 53,229 psi | 87% | 2907 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 52,663 psi | 86% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,113 psi | 87% | 2858 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,403 psi | 88% | 2815 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,824 psi | 88% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,127 psi | 87% | 2864 fps | 98.9% |
| Lovex S070 | <<locked>> | 98% | 53,998 psi | 89% | 2897 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 52,199 psi | 86% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,939 psi | 87% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 90% | 54,491 psi | 89% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 98% | 52,721 psi | 87% | 2910 fps | 95.9% |
| Norma URP | <<locked>> | 98% | 52,011 psi | 85% | 2923 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 51,488 psi | 85% | 2887 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,447 psi | 89% | 2976 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 52,939 psi | 87% | 2854 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 84% | 52,591 psi | 86% | 2871 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,519 psi | 88% | 2835 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 59% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,055 psi | 87% | 2864 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 52,170 psi | 86% | 2943 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 51,706 psi | 85% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 52,605 psi | 86% | 2959 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 52,272 psi | 86% | 2982 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 84% | 53,171 psi | 87% | 2808 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 52,852 psi | 87% | 2828 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,897 psi | 90% | 2910 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 52,040 psi | 85% | 2838 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,127 psi | 87% | 2864 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,113 psi | 87% | 2858 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,824 psi | 88% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,998 psi | 89% | 2897 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,287 psi | 87% | 2923 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,911 psi | 90% | 2884 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 52,214 psi | 86% | 2858 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,940 psi | 89% | 2769 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,230 psi | 89% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,563 psi | 88% | 2818 fps | 97.8% |
| Somchem S321 | <<locked>> | 82% | 53,708 psi | 88% | 2864 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,200 psi | 87% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,607 psi | 90% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 52,011 psi | 85% | 2861 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,821 psi | 82% | 2923 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 46,224 psi | 76% | 2799 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 82% | 53,809 psi | 88% | 2733 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,230 psi | 89% | 2753 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 52,692 psi | 87% | 2795 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 53,388 psi | 88% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 53,374 psi | 88% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 54,592 psi | 90% | 2920 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 84% | 53,040 psi | 87% | 2835 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 51,634 psi | 85% | 2805 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,490 psi | 88% | 2923 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,018 psi | 69% | 2799 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,969 psi | 90% | 2897 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,026 psi | 87% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 52,518 psi | 86% | 2936 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,360 psi | 56% | 2723 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 51,938 psi | 85% | 2864 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% | 47,964 psi | 79% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,205 psi | 66% | 2605 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,659 psi | 78% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,890 psi | 75% | 2690 fps | 95.4% |
| Accurate 3100 | <<locked>> | 98% | 37,202 psi | 61% | 2628 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,043 psi | 62% | 2598 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,952 psi | 52% | 2523 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 44,237 psi | 73% | 2723 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 37,550 psi | 62% | 2569 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,369 psi | 76% | 2733 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,818 psi | 77% | 2717 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,335 psi | 66% | 2756 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,086 psi | 61% | 2592 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,914 psi | 66% | 2657 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,735 psi | 54% | 2546 fps | 95.3% |
| Alliant Reloder-17 | 63.4 gr | 80% | 32,024 psi | 53% | 2559 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,950 psi | 49% | 2500 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,679 psi | 57% | 2684 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,526 psi | 71% | 2726 fps | 98.5% |
| Bofors RP3 | <<locked>> | 80% | 36,651 psi | 60% | 2595 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 45,774 psi | 75% | 2730 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,167 psi | 79% | 2720 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,281 psi | 74% | 2753 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,227 psi | 82% | 2904 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 80% | 37,507 psi | 62% | 2598 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 42,569 psi | 70% | 2756 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 90% | 46,659 psi | 77% | 2782 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,628 psi | 73% | 2733 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,978 psi | 46% | 2385 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,698 psi | 67% | 2703 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 45,658 psi | 75% | 2838 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 43% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,917 psi | 70% | 2687 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,396 psi | 73% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,421 psi | 65% | 2605 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,003 psi | 69% | 2628 fps | 95.2% |
| IMR 4350 | <<locked>> | 92% | 43,221 psi | 71% | 2703 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,163 psi | 69% | 2661 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 33,359 psi | 55% | 2543 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 40,886 psi | 67% | 2687 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,369 psi | 76% | 2733 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,366 psi | 71% | 2703 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,411 psi | 73% | 2661 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 39,320 psi | 65% | 2608 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,564 psi | 60% | 2549 fps | 95.1% |
| Lovex S070 | <<locked>> | 90% | 41,814 psi | 69% | 2680 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,163 psi | 71% | 2674 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 43,555 psi | 72% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,276 psi | 64% | 2644 fps | 98.5% |
| Norma 204 | <<locked>> | 96% | 49,385 psi | 81% | 2854 fps | 95.1% |
| Norma URP | <<locked>> | 84% | 32,706 psi | 54% | 2536 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 39,001 psi | 64% | 2661 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 39,015 psi | 64% | 2687 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 46,224 psi | 76% | 2736 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,934 psi | 75% | 2762 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,125 psi | 82% | 2782 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,614 psi | 44% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,669 psi | 67% | 2638 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,177 psi | 69% | 2762 fps | 98.7% |
| ReloadSwiss RS 60 | 63.4 gr | 80% | 34,171 psi | 56% | 2628 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,360 psi | 56% | 2605 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,014 psi | 61% | 2674 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 47,007 psi | 77% | 2713 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,162 psi | 68% | 2628 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,447 psi | 57% | 2536 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 45,774 psi | 75% | 2730 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,564 psi | 60% | 2549 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,366 psi | 71% | 2703 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,320 psi | 65% | 2608 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 41,814 psi | 69% | 2680 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,592 psi | 58% | 2592 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,469 psi | 73% | 2710 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,830 psi | 70% | 2694 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,657 psi | 73% | 2625 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,072 psi | 61% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,944 psi | 67% | 2598 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 50,169 psi | 82% | 2812 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,237 psi | 73% | 2628 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,309 psi | 73% | 2710 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 35,331 psi | 58% | 2546 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 25,469 psi | 42% | 2365 fps | 95.4% |
| Somchem S385 | <<locked>> | 98% | 43,279 psi | 71% | 2743 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 50,444 psi | 83% | 2684 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,049 psi | 74% | 2618 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,582 psi | 67% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,379 psi | 68% | 2618 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,663 psi | 55% | 2484 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,084 psi | 56% | 2536 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 46,528 psi | 76% | 2730 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,697 psi | 65% | 2605 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,518 psi | 55% | 2536 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 32,097 psi | 53% | 2575 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,791 psi | 49% | 2402 fps | 96.1% |
| Winchester 748 | <<locked>> | 80% | 46,122 psi | 76% | 2772 fps | 100% |
| Winchester 760 | 69.8 gr | 90% | 42,757 psi | 70% | 2759 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,137 psi | 46% | 2516 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,250 psi | 69% | 2697 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 97 powders for .338 Blaser Mag. loaded with the .338 | 200gr | Reichenberg HDB Universal. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,762 fps to 3,005 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 (420 MPa), the top charges use 56–90 %, 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. ReloadSwiss RS 60, Alliant Reloder-17, Winchester 760 rank at the top here: for .338 Blaser Mag. with the .338 | 200gr | Reichenberg HDB Universal 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.