Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 168gr | Sierra MatchKing bullet and 87 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.
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 2495 | <<locked>> | 82% | 54,288 psi | 87% | 2815 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,666 psi | 89% | 2884 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,229 psi | 85% | 2920 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,810 psi | 88% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,376 psi | 89% | 2976 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,984 psi | 88% | 2904 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,405 psi | 90% | 3015 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,070 psi | 87% | 3005 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,099 psi | 87% | 3025 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,637 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,970 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,159 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,809 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,680 psi | 89% | 3002 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 3002 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,966 psi | 80% | 2940 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,511 psi | 70% | 2854 fps | 98.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,447 psi | 86% | 3077 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 2923 fps | 96.5% |
| Bofors RP3 | <<locked>> | 84% | 52,852 psi | 85% | 2887 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 3002 fps | 97.6% |
| Bofors RP7 | <<locked>> | 90% | 55,898 psi | 90% | 2927 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 53,287 psi | 85% | 2904 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 54,041 psi | 87% | 2972 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 53,969 psi | 87% | 2933 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,866 psi | 85% | 2904 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,534 psi | 87% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,215 psi | 87% | 3005 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 58% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,332 psi | 89% | 2907 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,331 psi | 87% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,577 psi | 86% | 2867 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 53,476 psi | 86% | 2904 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,230 psi | 87% | 2900 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 55,912 psi | 90% | 2969 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,882 psi | 86% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,869 psi | 90% | 2943 fps | 96.2% |
| Lovex S060 | <<locked>> | 82% | 55,898 psi | 90% | 2871 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,694 psi | 88% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,201 psi | 87% | 2897 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,477 psi | 89% | 2940 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,309 psi | 71% | 2769 fps | 98% |
| Norma 201 | <<locked>> | 82% | 55,767 psi | 89% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,259 psi | 89% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,085 psi | 87% | 2953 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 56,391 psi | 90% | 3094 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 54,172 psi | 87% | 2959 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,086 psi | 90% | 2963 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,764 psi | 83% | 2989 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 92% | 52,997 psi | 85% | 2959 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,282 psi | 74% | 2861 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 59% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,359 psi | 86% | 2887 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,243 psi | 85% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,245 psi | 89% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,766 psi | 86% | 3025 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,525 psi | 68% | 2871 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 82% | 53,272 psi | 85% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,156 psi | 85% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,592 psi | 88% | 2930 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 55,042 psi | 88% | 2992 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 55,898 psi | 90% | 2927 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,201 psi | 87% | 2897 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,694 psi | 88% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,477 psi | 89% | 2940 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,694 psi | 88% | 2946 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,724 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,273 psi | 87% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,882 psi | 86% | 2848 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,563 psi | 87% | 2986 fps | 97.9% |
| Somchem S335 | <<locked>> | 82% | 56,304 psi | 90% | 2815 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 53,229 psi | 85% | 2884 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,490 psi | 86% | 2966 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,564 psi | 89% | 2963 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 53,388 psi | 86% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,708 psi | 86% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,259 psi | 87% | 2858 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,202 psi | 90% | 2956 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,285 psi | 82% | 2881 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 55,274 psi | 89% | 2861 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,332 psi | 89% | 2959 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 3022 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,057 psi | 90% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,273 psi | 87% | 2976 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,237 psi | 73% | 2995 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,796 psi | 89% | 2927 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,840 psi | 90% | 2959 fps | 97.9% |
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% | 51,068 psi | 82% | 2769 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,863 psi | 78% | 2769 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 35,447 psi | 57% | 2579 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 48,356 psi | 78% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,753 psi | 59% | 2628 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 45,571 psi | 73% | 2743 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 46,470 psi | 75% | 2841 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 98% | 50,546 psi | 81% | 2943 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,357 psi | 81% | 2963 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,050 psi | 74% | 2769 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,269 psi | 79% | 2841 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,839 psi | 57% | 2635 fps | 97.6% |
| Alliant Reloder-17 | 62.7 gr | 80% | 40,596 psi | 65% | 2766 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,178 psi | 69% | 2772 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,308 psi | 69% | 2822 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,963 psi | 45% | 2438 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,823 psi | 54% | 2615 fps | 95.1% |
| Alliant Reloder-26 | 67.5 gr | 84% | 32,184 psi | 52% | 2615 fps | 95.4% |
| Bofors RP15 | <<locked>> | 98% | 45,426 psi | 73% | 2864 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 46,325 psi | 74% | 2779 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,308 psi | 69% | 2822 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,930 psi | 66% | 2648 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,804 psi | 75% | 2789 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,624 psi | 62% | 2671 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 44,382 psi | 71% | 2756 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,344 psi | 53% | 2530 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,894 psi | 82% | 2884 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,422 psi | 65% | 2743 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 43% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,938 psi | 83% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,935 psi | 77% | 2779 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,314 psi | 81% | 2808 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 41,481 psi | 67% | 2680 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,337 psi | 68% | 2680 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 35,360 psi | 57% | 2579 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 50,517 psi | 81% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,417 psi | 84% | 2884 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 52,692 psi | 84% | 2822 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,312 psi | 77% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,856 psi | 64% | 2628 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 38,000 psi | 61% | 2605 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 36,419 psi | 58% | 2602 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 52,576 psi | 84% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,631 psi | 78% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,164 psi | 71% | 2772 fps | 95% |
| Norma MRP | <<locked>> | 90% | 39,813 psi | 64% | 2776 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 36,521 psi | 59% | 2621 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 48,936 psi | 78% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,283 psi | 77% | 2923 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 35,404 psi | 57% | 2605 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 42,989 psi | 69% | 2795 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 44% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,847 psi | 75% | 2772 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,120 psi | 69% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,390 psi | 58% | 2641 fps | 97.2% |
| ReloadSwiss RS 70 | 63.7 gr | 80% | 35,520 psi | 57% | 2644 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,653 psi | 64% | 2799 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,937 psi | 80% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,627 psi | 70% | 2726 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,124 psi | 77% | 2818 fps | 95% |
| Rottweil R 905 | <<locked>> | 92% | 44,976 psi | 72% | 2812 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 40,930 psi | 66% | 2648 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,856 psi | 64% | 2628 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 48,312 psi | 77% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,000 psi | 61% | 2605 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,701 psi | 72% | 2779 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,112 psi | 84% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,976 psi | 72% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,957 psi | 62% | 2569 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,570 psi | 71% | 2805 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 53,084 psi | 85% | 2772 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,034 psi | 71% | 2726 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 33,098 psi | 53% | 2579 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,132 psi | 64% | 2680 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 50,140 psi | 80% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,386 psi | 81% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,959 psi | 67% | 2654 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,000 psi | 61% | 2625 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 42,018 psi | 67% | 2710 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 48,762 psi | 78% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,463 psi | 60% | 2625 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,805 psi | 46% | 2457 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,115 psi | 60% | 2592 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 38,769 psi | 62% | 2674 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,411 psi | 42% | 2461 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,156 psi | 84% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,208 psi | 72% | 2779 fps | 95.5% |
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 .308 | 168gr | Sierra MatchKing. Norma MRP delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,094 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 56–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:13.5 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 Win. Mag. with the .308 | 168gr | Sierra MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.