Load Specifications
Load data in caliber .338 Win Mag. with .338 | 180gr | Peregrine VLR-4 bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 52 and Hodgdon LEVERevolution.
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 2015 | <<locked>> | 90% | 55,405 psi | 89% | 2864 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,912 psi | 90% | 2966 fps | 98.8% |
| Accurate 2460 | <<locked>> | 86% | 53,911 psi | 86% | 2887 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 56,028 psi | 90% | 2923 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,795 psi | 86% | 2933 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 53,621 psi | 86% | 2927 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,832 psi | 73% | 2864 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 84% | 55,724 psi | 89% | 2818 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,144 psi | 90% | 2841 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 55,651 psi | 89% | 2963 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 96% | 53,200 psi | 85% | 2904 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 82% | 53,592 psi | 86% | 2897 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,911 psi | 88% | 2920 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 54,665 psi | 88% | 2904 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,550 psi | 89% | 3022 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 55,288 psi | 89% | 3071 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 55,796 psi | 89% | 2976 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,333 psi | 90% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 53,345 psi | 86% | 2946 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,788 psi | 73% | 2871 fps | 96.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,924 psi | 85% | 3035 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,651 psi | 89% | 2818 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 55,550 psi | 89% | 2976 fps | 98.6% |
| Bofors RP3 | <<locked>> | 98% | 56,246 psi | 90% | 2992 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 53,766 psi | 86% | 2858 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 52,634 psi | 84% | 2933 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,694 psi | 88% | 3035 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 88% | 54,853 psi | 88% | 2913 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,881 psi | 85% | 2894 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,375 psi | 87% | 2949 fps | 97.8% |
| Hodgdon H4198 | <<locked>> | 82% | 54,824 psi | 88% | 2825 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 56,202 psi | 90% | 2976 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,785 psi | 67% | 2753 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 53,780 psi | 86% | 2992 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 55% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 55,405 psi | 89% | 2949 fps | 99.5% |
| IMR 3031 | <<locked>> | 94% | 53,534 psi | 86% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 55,027 psi | 88% | 2923 fps | 98.9% |
| IMR 4198 | <<locked>> | 84% | 53,650 psi | 86% | 2802 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 54,723 psi | 88% | 2982 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 54,911 psi | 88% | 2920 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 55,259 psi | 89% | 2910 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 54,737 psi | 88% | 2943 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,898 psi | 90% | 2894 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 55,347 psi | 89% | 2936 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2864 fps | 96.3% |
| Norma 200 | <<locked>> | 82% | 56,260 psi | 90% | 2858 fps | 100% |
| Norma 201 | <<locked>> | 92% | 54,273 psi | 87% | 2910 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 54,795 psi | 88% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 96% | 55,782 psi | 89% | 2986 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2858 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 96% | 56,376 psi | 90% | 3012 fps | 99.3% |
| Ramshot TAC | <<locked>> | 90% | 55,796 psi | 89% | 2933 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 54,563 psi | 87% | 2949 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,376 psi | 90% | 2923 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,954 psi | 56% | 1821 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,636 psi | 88% | 2907 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,056 psi | 88% | 2927 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,142 psi | 85% | 3012 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 52,924 psi | 85% | 3045 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,759 psi | 73% | 2884 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 90% | 55,288 psi | 89% | 2900 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 54,766 psi | 88% | 2907 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2979 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2864 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 54,737 psi | 88% | 2943 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 55,347 psi | 89% | 2936 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,723 psi | 88% | 2877 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,434 psi | 90% | 2569 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 53,925 psi | 86% | 2904 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 54,375 psi | 87% | 2989 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,258 psi | 85% | 2854 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 53,548 psi | 86% | 2900 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,186 psi | 87% | 2933 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,287 psi | 85% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,304 psi | 90% | 2854 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 56,275 psi | 90% | 2956 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 55,448 psi | 89% | 2854 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 52,968 psi | 85% | 2897 fps | 98.9% |
| Somchem S355 | <<locked>> | 98% | 52,968 psi | 85% | 2923 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,799 psi | 65% | 2802 fps | 98.6% |
| Unknown powderᴾ | <<locked>> | 100% | 50,488 psi | 81% | 2927 fps | 96.9% |
| Vihtavuori N120 | <<locked>> | 82% | 54,012 psi | 87% | 2736 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 55,129 psi | 88% | 2815 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,550 psi | 89% | 2838 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 56,246 psi | 90% | 2917 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,375 psi | 87% | 2887 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 47,761 psi | 77% | 2805 fps | 99.5% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,995 psi | 82% | 2900 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 88% | 54,853 psi | 88% | 2930 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 94% | 54,186 psi | 87% | 2913 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2949 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,734 psi | 80% | 2851 fps | 99% |
| Winchester 748 | <<locked>> | 88% | 55,535 psi | 89% | 2979 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,709 psi | 89% | 2969 fps | 99.6% |
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 2015 | <<locked>> | 80% | 40,437 psi | 65% | 2628 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,243 psi | 84% | 2907 fps | 98.3% |
| Accurate 2460 | <<locked>> | 80% | 43,903 psi | 70% | 2726 fps | 99.7% |
| Accurate 2495 | <<locked>> | 80% | 32,518 psi | 52% | 2516 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 37,623 psi | 60% | 2648 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 32,082 psi | 51% | 2516 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 42,627 psi | 68% | 2802 fps | 95.9% |
| Accurate LT-30 | <<locked>> | 80% | 49,110 psi | 79% | 2720 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,487 psi | 79% | 2740 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 38,159 psi | 61% | 2635 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 39,059 psi | 63% | 2638 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 50,096 psi | 80% | 2841 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,176 psi | 64% | 2657 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 39,088 psi | 63% | 2664 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,455 psi | 73% | 2844 fps | 98.4% |
| Alliant Power Pro 2000-MR | 62.8 gr | 86% | 41,959 psi | 67% | 2815 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,518 psi | 54% | 2549 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,050 psi | 75% | 2746 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 38,711 psi | 62% | 2667 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,480 psi | 65% | 2756 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,476 psi | 57% | 2667 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,849 psi | 78% | 2720 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 39,566 psi | 63% | 2680 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 32,779 psi | 53% | 2543 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,105 psi | 68% | 2654 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,159 psi | 60% | 2644 fps | 97.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,002 psi | 66% | 2779 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 42,467 psi | 68% | 2710 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,298 psi | 79% | 2838 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 44,556 psi | 71% | 2779 fps | 95.7% |
| Hodgdon H4198 | <<locked>> | 80% | 51,576 psi | 83% | 2772 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 38,421 psi | 62% | 2648 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,751 psi | 56% | 2592 fps | 95% |
| Hodgdon LEVERevolution | 57.5 gr | 82% | 33,736 psi | 54% | 2592 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,657 psi | 41% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,665 psi | 57% | 2575 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 34,069 psi | 55% | 2589 fps | 99.6% |
| IMR 4064 | <<locked>> | 86% | 38,174 psi | 61% | 2612 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 47,587 psi | 76% | 2713 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 37,057 psi | 59% | 2644 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 40,176 psi | 64% | 2657 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 44,933 psi | 72% | 2743 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 36,318 psi | 58% | 2612 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 38,899 psi | 62% | 2585 fps | 96.2% |
| Lovex S062 | <<locked>> | 80% | 33,707 psi | 54% | 2523 fps | 96% |
| Lovex S065 | <<locked>> | 98% | 48,066 psi | 77% | 2812 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 52,968 psi | 85% | 2808 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,376 psi | 60% | 2595 fps | 97.1% |
| Norma 202 | <<locked>> | 80% | 37,405 psi | 60% | 2612 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 35,563 psi | 57% | 2598 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 43,076 psi | 69% | 2802 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 84% | 37,681 psi | 60% | 2667 fps | 95.5% |
| Ramshot TAC | <<locked>> | 84% | 45,672 psi | 73% | 2759 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,059 psi | 63% | 2664 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,540 psi | 70% | 2703 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,759 psi | 41% | 1624 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,933 psi | 72% | 2746 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,619 psi | 83% | 2871 fps | 95.6% |
| ReloadSwiss RS 52 | 58.1 gr | 82% | 37,550 psi | 60% | 2707 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 31,082 psi | 50% | 2556 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 42,598 psi | 68% | 2818 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 40,988 psi | 66% | 2651 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 35,520 psi | 57% | 2543 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 33,011 psi | 53% | 2543 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 98% | 48,066 psi | 77% | 2812 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,318 psi | 58% | 2612 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 33,707 psi | 54% | 2523 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,572 psi | 76% | 2762 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,664 psi | 86% | 2536 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,328 psi | 81% | 2848 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 36,709 psi | 59% | 2651 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,876 psi | 75% | 2756 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 43,569 psi | 70% | 2726 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,724 psi | 59% | 2598 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,030 psi | 63% | 2569 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,010 psi | 51% | 2425 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 42,931 psi | 69% | 2730 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 38,522 psi | 62% | 2572 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 37,594 psi | 60% | 2612 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 34,214 psi | 55% | 2556 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 31,691 psi | 51% | 2575 fps | 95.4% |
| Unknown powder | <<locked>> | 96% | 44,222 psi | 71% | 2812 fps | 95.3% |
| Vihtavuori N120 | <<locked>> | 80% | 51,024 psi | 82% | 2697 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 43,439 psi | 70% | 2638 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 36,579 psi | 59% | 2523 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,388 psi | 54% | 2526 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 34,838 psi | 56% | 2536 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 30,806 psi | 49% | 2454 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 94% | 41,785 psi | 67% | 2733 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 42,134 psi | 68% | 2707 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 34,563 psi | 55% | 2549 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 94% | 41,959 psi | 67% | 2779 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,607 psi | 57% | 2569 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 41,959 psi | 67% | 2749 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,744 psi | 72% | 2785 fps | 98.2% |
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 113 powders for .338 Win Mag. loaded with the .338 | 180gr | Peregrine VLR-4. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,071 fps. Accurate 4350 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.338" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .338 Win Mag. with the .338 | 180gr | Peregrine VLR-4 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.