Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 166gr | Peregrine 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-26 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.
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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 2495 | <<locked>> | 82% | 54,331 psi | 85% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,101 psi | 88% | 2936 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,983 psi | 85% | 2976 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 54,810 psi | 86% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,057 psi | 88% | 3028 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,463 psi | 88% | 3123 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 82% | 57,667 psi | 90% | 3002 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,361 psi | 87% | 2953 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,435 psi | 90% | 3077 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3068 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,882 psi | 86% | 3077 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,115 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,260 psi | 88% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,130 psi | 90% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,520 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,608 psi | 89% | 3061 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,795 psi | 84% | 3058 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,850 psi | 80% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,005 psi | 69% | 2907 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,766 psi | 86% | 3136 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,182 psi | 77% | 2976 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 56,869 psi | 89% | 2989 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,795 psi | 84% | 3058 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 56,304 psi | 88% | 2976 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 57,551 psi | 90% | 3012 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,781 psi | 86% | 3025 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 54,476 psi | 85% | 2986 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 55,056 psi | 86% | 3009 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,867 psi | 84% | 2989 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,348 psi | 90% | 3009 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,042 psi | 86% | 2992 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,100 psi | 86% | 3064 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1867 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,883 psi | 88% | 2959 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,781 psi | 86% | 2936 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,551 psi | 90% | 2976 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 57,638 psi | 90% | 3015 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,766 psi | 86% | 2953 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 56,536 psi | 89% | 3018 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,302 psi | 85% | 2976 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,724 psi | 89% | 2999 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,301 psi | 82% | 3035 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 56,275 psi | 88% | 2923 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,998 psi | 86% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,621 psi | 86% | 2946 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,883 psi | 88% | 2989 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,483 psi | 70% | 2812 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 56,144 psi | 88% | 2940 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,927 psi | 89% | 2933 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,550 psi | 87% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,897 psi | 86% | 3012 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 57,566 psi | 90% | 3153 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 54,752 psi | 86% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,594 psi | 89% | 3012 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,736 psi | 83% | 3051 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 57,537 psi | 90% | 3071 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,905 psi | 74% | 2917 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 58% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,392 psi | 90% | 2995 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,682 psi | 90% | 3074 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,099 psi | 85% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,999 psi | 88% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,694 psi | 86% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,047 psi | 67% | 2923 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 56,855 psi | 89% | 2940 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,956 psi | 89% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,390 psi | 87% | 2989 fps | 97% |
| Rottweil R 905 | <<locked>> | 98% | 55,724 psi | 87% | 3045 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 56,304 psi | 88% | 2976 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,621 psi | 86% | 2946 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,998 psi | 86% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,883 psi | 88% | 2989 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,216 psi | 87% | 2999 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,231 psi | 88% | 2972 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,043 psi | 89% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,752 psi | 86% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,317 psi | 85% | 2897 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,245 psi | 87% | 3041 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 56,710 psi | 89% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,029 psi | 89% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,130 psi | 90% | 2979 fps | 96.5% |
| Somchem S365 | <<locked>> | 94% | 54,273 psi | 85% | 3015 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,289 psi | 88% | 3018 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 57,609 psi | 90% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,348 psi | 90% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,624 psi | 90% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,766 psi | 86% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,043 psi | 89% | 3009 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,228 psi | 82% | 2940 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 55,883 psi | 88% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,130 psi | 88% | 3015 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,652 psi | 89% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,708 psi | 84% | 3074 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,971 psi | 89% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,013 psi | 86% | 3028 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,788 psi | 72% | 3048 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,434 psi | 88% | 2979 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 3022 fps | 98.2% |
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 2495 | <<locked>> | 80% | 50,908 psi | 80% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,994 psi | 77% | 2818 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,389 psi | 55% | 2615 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,283 psi | 76% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,666 psi | 57% | 2664 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 98% | 52,402 psi | 82% | 3051 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 54,012 psi | 85% | 2943 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,963 psi | 72% | 2792 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,990 psi | 69% | 2831 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 51,242 psi | 80% | 3002 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,966 psi | 80% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,311 psi | 73% | 2815 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,501 psi | 78% | 2887 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,042 psi | 56% | 2680 fps | 97.9% |
| Alliant Reloder-17 | 65.7 gr | 80% | 40,959 psi | 64% | 2812 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,424 psi | 68% | 2822 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,874 psi | 69% | 2874 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,905 psi | 44% | 2470 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,910 psi | 53% | 2657 fps | 95.5% |
| Alliant Reloder-26 | 70.7 gr | 84% | 32,256 psi | 51% | 2654 fps | 95.6% |
| Bofors RP15 | <<locked>> | 96% | 43,062 psi | 67% | 2851 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,528 psi | 73% | 2825 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,874 psi | 69% | 2874 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 41,017 psi | 64% | 2694 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,021 psi | 74% | 2838 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,812 psi | 61% | 2713 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,945 psi | 66% | 2746 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 51,314 psi | 80% | 2946 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,444 psi | 79% | 2930 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,489 psi | 52% | 2569 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,474 psi | 81% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,886 psi | 64% | 2795 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1667 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,301 psi | 82% | 2904 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,312 psi | 76% | 2828 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,531 psi | 79% | 2858 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 39,131 psi | 61% | 2671 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,569 psi | 67% | 2726 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 35,375 psi | 55% | 2618 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 50,778 psi | 80% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,951 psi | 78% | 2884 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 48,776 psi | 76% | 2966 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 52,939 psi | 83% | 2871 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,341 psi | 76% | 2822 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,914 psi | 63% | 2671 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 37,985 psi | 60% | 2644 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 34,142 psi | 54% | 2585 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 52,779 psi | 83% | 2887 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,476 psi | 84% | 2884 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,820 psi | 77% | 2874 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,483 psi | 70% | 2822 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 40,147 psi | 63% | 2822 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,637 psi | 57% | 2664 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,371 psi | 77% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,008 psi | 77% | 2982 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 35,665 psi | 56% | 2648 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 40,379 psi | 63% | 2779 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 43% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,007 psi | 74% | 2822 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,838 psi | 84% | 3012 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,613 psi | 68% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,593 psi | 57% | 2684 fps | 97.4% |
| ReloadSwiss RS 70 | 66.7 gr | 80% | 35,665 psi | 56% | 2690 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,972 psi | 63% | 2851 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,198 psi | 79% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,642 psi | 68% | 2766 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,602 psi | 76% | 2867 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 42,511 psi | 67% | 2802 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 41,017 psi | 64% | 2694 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,914 psi | 63% | 2671 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 48,341 psi | 76% | 2822 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,985 psi | 60% | 2644 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,179 psi | 71% | 2828 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,663 psi | 83% | 2917 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,534 psi | 84% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,223 psi | 71% | 2680 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,899 psi | 61% | 2608 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,119 psi | 66% | 2795 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 53,374 psi | 84% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,179 psi | 69% | 2769 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,534 psi | 84% | 2920 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 33,127 psi | 52% | 2615 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,263 psi | 63% | 2723 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 54,143 psi | 85% | 2802 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,430 psi | 79% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,676 psi | 79% | 2815 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,090 psi | 66% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,087 psi | 60% | 2664 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 42,598 psi | 67% | 2762 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,052 psi | 77% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,579 psi | 59% | 2664 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 28,703 psi | 45% | 2490 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 96% | 50,154 psi | 79% | 3009 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,391 psi | 59% | 2638 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,986 psi | 61% | 2720 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,281 psi | 41% | 2497 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,649 psi | 83% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,583 psi | 67% | 2766 fps | 95% |
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 105 powders for .300 Weath. Mag. loaded with the .308 | 166gr | Peregrine Glider GRM. Norma MRP delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,867 fps to 3,153 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Alliant Reloder-17 rank at the top here: for .300 Weath. Mag. with the .308 | 166gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.