Load Specifications
Load data in caliber .300 Win. Mag. with .306 | 160gr | Peregrine Plainsmaster (VLR-4) bullet and 99 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-16 and Hodgdon Superformance.
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 2015 | <<locked>> | 82% | 56,347 psi | 90% | 2874 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,230 psi | 89% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,375 psi | 87% | 2910 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,543 psi | 75% | 2864 fps | 97.8% |
| Accurate 4064 | <<locked>> | 88% | 55,521 psi | 89% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 52,533 psi | 84% | 2992 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 55,550 psi | 89% | 2982 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 53,548 psi | 86% | 2940 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,317 psi | 87% | 3031 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,447 psi | 87% | 2933 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,869 psi | 90% | 2904 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,985 psi | 90% | 3114 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 53,780 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,114 psi | 87% | 2979 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 53,940 psi | 86% | 3061 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,056 psi | 88% | 3091 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,301 psi | 85% | 3018 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,135 psi | 71% | 2897 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,522 psi | 62% | 2785 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,212 psi | 81% | 3081 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,651 psi | 89% | 3002 fps | 99.9% |
| Bofors RP3 | <<locked>> | 88% | 54,273 psi | 87% | 2972 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,288 psi | 87% | 2949 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,869 psi | 90% | 2913 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,983 psi | 87% | 2959 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,100 psi | 88% | 2989 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 55,477 psi | 89% | 3051 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 92% | 55,637 psi | 89% | 3009 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 84% | 56,144 psi | 90% | 2995 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 53,896 psi | 86% | 2979 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,260 psi | 90% | 3031 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,811 psi | 89% | 3087 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,853 psi | 57% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,838 psi | 86% | 2943 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,997 psi | 85% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,405 psi | 90% | 2976 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,941 psi | 90% | 2953 fps | 98.5% |
| IMR 4350 | <<locked>> | 96% | 54,998 psi | 88% | 2982 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,115 psi | 90% | 2982 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 53,272 psi | 85% | 2986 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 55,535 psi | 89% | 3012 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,447 psi | 87% | 2933 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,753 psi | 89% | 2959 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,839 psi | 88% | 2910 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,159 psi | 90% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,782 psi | 89% | 2976 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 53,359 psi | 86% | 2959 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 54,114 psi | 87% | 2927 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,042 psi | 88% | 2927 fps | 100% |
| Norma 203B | <<locked>> | 86% | 53,374 psi | 86% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,709 psi | 89% | 3031 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 49,501 psi | 79% | 3031 fps | 97.5% |
| Norma URP | <<locked>> | 96% | 55,274 psi | 89% | 3038 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 54,085 psi | 87% | 2992 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 54,172 psi | 87% | 3035 fps | 99% |
| Ramshot TAC | <<locked>> | 82% | 54,621 psi | 88% | 2953 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,462 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 58% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,361 psi | 89% | 2972 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,839 psi | 88% | 3048 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,723 psi | 88% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,231 psi | 90% | 3074 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,317 psi | 89% | 3104 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 54,969 psi | 88% | 2907 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,882 psi | 88% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,128 psi | 87% | 2966 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,173 psi | 90% | 3002 fps | 96% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2999 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 92% | 54,288 psi | 87% | 2949 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,782 psi | 89% | 2976 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,753 psi | 89% | 2959 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,159 psi | 90% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 53,359 psi | 86% | 2959 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,318 psi | 90% | 3031 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 53,185 psi | 85% | 2930 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,128 psi | 87% | 2956 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,579 psi | 89% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,101 psi | 90% | 2861 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,825 psi | 90% | 2927 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,866 psi | 83% | 2995 fps | 96.6% |
| Somchem S335 | <<locked>> | 84% | 54,897 psi | 88% | 2858 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,997 psi | 85% | 2920 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,346 psi | 87% | 2963 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,882 psi | 86% | 3038 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2979 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 84% | 56,028 psi | 90% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,853 psi | 88% | 2887 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,564 psi | 89% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,057 psi | 90% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,027 psi | 87% | 2979 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 54,752 psi | 88% | 2930 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 53,722 psi | 86% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 53,142 psi | 85% | 2982 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,037 psi | 79% | 2972 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 53,954 psi | 87% | 2953 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,405 psi | 89% | 2982 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,477 psi | 89% | 3051 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,566 psi | 63% | 2920 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,099 psi | 87% | 2963 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% | 52,823 psi | 85% | 2825 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,208 psi | 72% | 2746 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,440 psi | 71% | 2733 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 37,637 psi | 60% | 2684 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,830 psi | 69% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,966 psi | 51% | 2566 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 49,008 psi | 79% | 2877 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,553 psi | 67% | 2717 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 47,645 psi | 76% | 2910 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,140 psi | 82% | 2881 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,214 psi | 84% | 2854 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,121 psi | 72% | 2920 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,408 psi | 66% | 2740 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,527 psi | 71% | 2812 fps | 99.2% |
| Alliant Reloder-16 | 55.9 gr | 80% | 32,140 psi | 52% | 2585 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,071 psi | 58% | 2717 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,934 psi | 75% | 2900 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,776 psi | 48% | 2543 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,172 psi | 58% | 2723 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,693 psi | 56% | 2733 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,501 psi | 78% | 2884 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,321 psi | 66% | 2746 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 44,672 psi | 72% | 2776 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,562 psi | 84% | 2861 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,444 psi | 81% | 2904 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,989 psi | 67% | 2753 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,221 psi | 68% | 2805 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 45,672 psi | 73% | 2831 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,501 psi | 79% | 2887 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,472 psi | 47% | 2477 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,788 psi | 73% | 2858 fps | 99.9% |
| Hodgdon Superformance | 70 gr | 88% | 44,846 psi | 72% | 2887 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 43% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,442 psi | 76% | 2835 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 49,545 psi | 79% | 2871 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,685 psi | 70% | 2753 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,021 psi | 74% | 2776 fps | 96.6% |
| IMR 4350 | <<locked>> | 88% | 42,583 psi | 68% | 2753 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,959 psi | 66% | 2697 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 33,185 psi | 53% | 2582 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 45,672 psi | 73% | 2841 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 51,140 psi | 82% | 2881 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,530 psi | 78% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,428 psi | 78% | 2805 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,598 psi | 70% | 2753 fps | 99.9% |
| Lovex S065 | <<locked>> | 82% | 38,072 psi | 61% | 2641 fps | 95.8% |
| Lovex S070 | <<locked>> | 86% | 41,249 psi | 66% | 2730 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,659 psi | 76% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,240 psi | 77% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,918 psi | 70% | 2795 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 48,414 psi | 78% | 2907 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 43,004 psi | 69% | 2897 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,358 psi | 52% | 2572 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 43,830 psi | 70% | 2812 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,566 psi | 62% | 2733 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,198 psi | 82% | 2897 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,937 psi | 82% | 2910 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 43% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,380 psi | 68% | 2736 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,543 psi | 76% | 2923 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,450 psi | 62% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,113 psi | 55% | 2644 fps | 95.5% |
| ReloadSwiss RS 70 | 64.2 gr | 84% | 36,347 psi | 58% | 2713 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 51,590 psi | 83% | 2854 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,368 psi | 73% | 2769 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,899 psi | 62% | 2687 fps | 99% |
| Rottweil R 904 | <<locked>> | 98% | 52,634 psi | 84% | 2943 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 96% | 45,542 psi | 73% | 2877 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 44,672 psi | 72% | 2776 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,072 psi | 61% | 2641 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,530 psi | 78% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,598 psi | 70% | 2753 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,249 psi | 66% | 2730 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,972 psi | 64% | 2740 fps | 98.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,661 psi | 80% | 2871 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,355 psi | 76% | 2841 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,052 psi | 79% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,075 psi | 66% | 2628 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,059 psi | 64% | 2641 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,501 psi | 78% | 2933 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 48,515 psi | 78% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,313 psi | 79% | 2861 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,421 psi | 63% | 2690 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 28,921 psi | 46% | 2520 fps | 97.3% |
| Somchem S385 | <<locked>> | 94% | 43,163 psi | 69% | 2799 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 49,559 psi | 79% | 2756 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,440 psi | 73% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,919 psi | 74% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,724 psi | 60% | 2625 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 33,707 psi | 54% | 2575 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 51,372 psi | 82% | 2877 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,121 psi | 71% | 2743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,141 psi | 53% | 2572 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 30,429 psi | 49% | 2562 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,243 psi | 53% | 2549 fps | 97.7% |
| Winchester 748 | <<locked>> | 80% | 51,750 psi | 83% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,424 psi | 68% | 2808 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,166 psi | 45% | 2569 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,224 psi | 76% | 2848 fps | 99.9% |
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 99 powders for .300 Win. Mag. loaded with the .306 | 160gr | Peregrine Plainsmaster (VLR-4). Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,114 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 160.0 gr projectile in 0.306" 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-16, Hodgdon Superformance rank at the top here: for .300 Win. Mag. with the .306 | 160gr | Peregrine Plainsmaster (VLR-4) 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.