Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 155.8gr | Peregrine Glider (Glider GRM) bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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>> | 82% | 55,288 psi | 89% | 2894 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,012 psi | 87% | 2913 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,941 psi | 90% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,359 psi | 86% | 2923 fps | 97.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,281 psi | 73% | 2871 fps | 97.2% |
| Accurate 4064 | <<locked>> | 88% | 54,273 psi | 87% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,853 psi | 88% | 3061 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 54,491 psi | 87% | 3002 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,941 psi | 90% | 3009 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,127 psi | 85% | 3041 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,432 psi | 86% | 2953 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,665 psi | 88% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,723 psi | 88% | 3130 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,086 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,026 psi | 85% | 2995 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,014 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,766 psi | 86% | 3104 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 3028 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,859 psi | 69% | 2900 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,834 psi | 78% | 3087 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,549 psi | 87% | 3018 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 53,084 psi | 85% | 2989 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 53,243 psi | 85% | 2966 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,940 psi | 88% | 2933 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,866 psi | 85% | 2976 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,940 psi | 86% | 3002 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 54,215 psi | 87% | 3061 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 92% | 54,520 psi | 87% | 3022 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 55,056 psi | 88% | 3012 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,260 psi | 90% | 3048 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,056 psi | 88% | 3048 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,520 psi | 87% | 3097 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,636 psi | 57% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,823 psi | 85% | 2959 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,405 psi | 89% | 2992 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,332 psi | 89% | 2989 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,955 psi | 88% | 2969 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 53,911 psi | 86% | 2995 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,085 psi | 88% | 2999 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 55,506 psi | 89% | 3054 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 54,418 psi | 87% | 3028 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,432 psi | 86% | 2953 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,578 psi | 88% | 2976 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,896 psi | 86% | 2927 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,056 psi | 88% | 2982 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,389 psi | 87% | 2986 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 55,622 psi | 89% | 3025 fps | 98.4% |
| Norma 201 | <<locked>> | 84% | 53,069 psi | 85% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,969 psi | 87% | 2946 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,695 psi | 89% | 3038 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,505 psi | 87% | 3045 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 48,312 psi | 77% | 3038 fps | 96.9% |
| Norma URP | <<locked>> | 96% | 54,027 psi | 87% | 3051 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 52,924 psi | 85% | 3009 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 52,910 psi | 85% | 3048 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 53,635 psi | 86% | 2969 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,374 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 58% | 1913 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,056 psi | 87% | 2982 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,592 psi | 86% | 3064 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,388 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,868 psi | 88% | 3087 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,056 psi | 87% | 3117 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,940 psi | 86% | 2927 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,838 psi | 86% | 2946 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,939 psi | 85% | 2979 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,111 psi | 82% | 3009 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 92% | 53,243 psi | 85% | 2966 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,389 psi | 87% | 2986 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,578 psi | 88% | 2976 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,056 psi | 88% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,622 psi | 89% | 3025 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,868 psi | 88% | 3045 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,811 psi | 89% | 3002 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,069 psi | 85% | 2972 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,592 psi | 88% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,056 psi | 88% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,752 psi | 88% | 2940 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,633 psi | 81% | 3002 fps | 95.9% |
| Somchem S335 | <<locked>> | 84% | 53,911 psi | 86% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,521 psi | 89% | 2992 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,229 psi | 85% | 2979 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,173 psi | 90% | 3107 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2986 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 84% | 55,027 psi | 88% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,708 psi | 86% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,491 psi | 87% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,926 psi | 88% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,391 psi | 90% | 3048 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,969 psi | 87% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,289 psi | 90% | 2972 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,405 psi | 89% | 3051 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2986 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,779 psi | 85% | 2966 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,244 psi | 87% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,215 psi | 87% | 3061 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,392 psi | 62% | 2917 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,997 psi | 85% | 2979 fps | 100% |
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% | 51,808 psi | 83% | 2844 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,150 psi | 71% | 2762 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,199 psi | 84% | 2933 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,615 psi | 75% | 2805 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 39,204 psi | 63% | 2749 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 41,814 psi | 67% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,359 psi | 53% | 2631 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 48,037 psi | 77% | 2890 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 40,727 psi | 65% | 2730 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 98% | 49,806 psi | 80% | 2979 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,169 psi | 80% | 2897 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,111 psi | 82% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,121 psi | 71% | 2930 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,495 psi | 65% | 2753 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,584 psi | 70% | 2825 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,533 psi | 54% | 2651 fps | 95.4% |
| Alliant Reloder-17 | 60.1 gr | 80% | 35,215 psi | 56% | 2723 fps | 97.9% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,907 psi | 78% | 2966 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,066 psi | 47% | 2546 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,274 psi | 58% | 2805 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,500 psi | 76% | 2897 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 40,350 psi | 65% | 2756 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 43,787 psi | 70% | 2785 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,648 psi | 83% | 2881 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,400 psi | 79% | 2920 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,075 psi | 66% | 2762 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 41,220 psi | 66% | 2815 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 47,834 psi | 77% | 2904 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 48,515 psi | 78% | 2904 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,761 psi | 46% | 2484 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,759 psi | 72% | 2874 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 43,845 psi | 70% | 2894 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 43% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,514 psi | 75% | 2851 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 48,689 psi | 78% | 2890 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,801 psi | 69% | 2766 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,179 psi | 72% | 2789 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 44,411 psi | 71% | 2822 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 42,786 psi | 69% | 2769 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 34,766 psi | 56% | 2651 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 44,701 psi | 72% | 2854 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 50,169 psi | 80% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,456 psi | 76% | 2864 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,558 psi | 76% | 2822 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 42,685 psi | 68% | 2769 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 37,275 psi | 60% | 2651 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 43,033 psi | 69% | 2795 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 46,717 psi | 75% | 2835 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 47,297 psi | 76% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,975 psi | 69% | 2808 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 50,778 psi | 81% | 2979 fps | 95.5% |
| Norma MRP | <<locked>> | 98% | 44,976 psi | 72% | 2969 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 33,765 psi | 54% | 2638 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 42,844 psi | 69% | 2825 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 40,379 psi | 65% | 2802 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 50,241 psi | 81% | 2910 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,922 psi | 80% | 2927 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 43% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,510 psi | 67% | 2746 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,427 psi | 74% | 2936 fps | 99.2% |
| ReloadSwiss RS 60 | 60.1 gr | 80% | 37,565 psi | 60% | 2795 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,694 psi | 57% | 2713 fps | 95.8% |
| ReloadSwiss RS 70 | 65.6 gr | 86% | 38,072 psi | 61% | 2785 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 50,662 psi | 81% | 2874 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,454 psi | 71% | 2785 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 37,971 psi | 61% | 2697 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 47,558 psi | 76% | 2946 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 43,787 psi | 70% | 2785 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,275 psi | 60% | 2651 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,456 psi | 76% | 2864 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,685 psi | 68% | 2769 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 43,033 psi | 69% | 2795 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,044 psi | 63% | 2749 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,660 psi | 78% | 2884 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,412 psi | 74% | 2854 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,153 psi | 77% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,248 psi | 65% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,858 psi | 67% | 2707 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,094 psi | 76% | 2940 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,616 psi | 76% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,312 psi | 77% | 2874 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 38,595 psi | 62% | 2700 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 28,181 psi | 45% | 2523 fps | 96.5% |
| Somchem S385 | <<locked>> | 96% | 45,179 psi | 72% | 2867 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 48,631 psi | 78% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,440 psi | 71% | 2762 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,991 psi | 72% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,898 psi | 59% | 2638 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 35,201 psi | 56% | 2641 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 50,372 psi | 81% | 2894 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,221 psi | 69% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,693 psi | 56% | 2641 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 31,676 psi | 51% | 2628 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,532 psi | 52% | 2556 fps | 97.2% |
| Winchester 748 | <<locked>> | 80% | 50,647 psi | 81% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,423 psi | 66% | 2818 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,283 psi | 47% | 2631 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,238 psi | 74% | 2864 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 .300 Win. Mag. loaded with the .308 | 155.8gr | Peregrine Glider (Glider GRM). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,130 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 (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .300 Win. Mag. with the .308 | 155.8gr | Peregrine Glider (Glider GRM) 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.