Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Remington PSP Core-Lokt bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 and Alliant Reloder-26.
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 2700 | <<locked>> | 86% | 56,202 psi | 90% | 2799 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 53,345 psi | 86% | 2838 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 54,607 psi | 88% | 2772 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,390 psi | 89% | 2881 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,347 psi | 90% | 2982 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 54,418 psi | 87% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,159 psi | 90% | 2927 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 53,795 psi | 86% | 2923 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,274 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,376 psi | 89% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,028 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,708 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,579 psi | 89% | 2917 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,055 psi | 85% | 2917 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,766 psi | 86% | 2904 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,572 psi | 75% | 2838 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,809 psi | 86% | 2986 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,025 psi | 83% | 2900 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 56,144 psi | 90% | 2844 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,055 psi | 85% | 2917 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 55,376 psi | 89% | 2831 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 82% | 52,750 psi | 85% | 2805 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,868 psi | 88% | 2897 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,259 psi | 89% | 2867 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 53,098 psi | 85% | 2851 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,852 psi | 85% | 2848 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,434 psi | 90% | 2861 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,317 psi | 87% | 2844 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,585 psi | 73% | 2874 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 88% | 53,867 psi | 86% | 2913 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 59% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,882 psi | 86% | 2792 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,330 psi | 86% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,434 psi | 89% | 2812 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,347 psi | 90% | 2864 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,461 psi | 86% | 2802 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 53,301 psi | 85% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,463 psi | 89% | 2854 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 55,376 psi | 89% | 2959 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 54,012 psi | 87% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,867 psi | 86% | 2805 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,158 psi | 88% | 2848 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,427 psi | 76% | 2740 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 54,679 psi | 88% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,606 psi | 86% | 2861 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 52,794 psi | 85% | 2943 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 54,070 psi | 87% | 2867 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,405 psi | 89% | 2858 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,216 psi | 89% | 2966 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 52,779 psi | 85% | 2867 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,028 psi | 90% | 2949 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 60% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,115 psi | 90% | 2844 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,098 psi | 85% | 2897 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,158 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,563 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,600 psi | 73% | 2867 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,956 psi | 90% | 2789 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,289 psi | 90% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,244 psi | 87% | 2844 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 54,984 psi | 88% | 2904 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 55,376 psi | 89% | 2831 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,867 psi | 86% | 2805 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 54,012 psi | 87% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,158 psi | 88% | 2848 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,288 psi | 87% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,606 psi | 86% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,388 psi | 86% | 2756 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,505 psi | 87% | 2897 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 56,115 psi | 90% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,898 psi | 90% | 2835 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 53,490 psi | 86% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,579 psi | 89% | 2881 fps | 99.2% |
| Unknown powder | <<locked>> | 88% | 54,491 psi | 87% | 2871 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 56,101 psi | 90% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,796 psi | 89% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,389 psi | 87% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,955 psi | 88% | 2841 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2825 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 55,506 psi | 89% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,259 psi | 89% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,362 psi | 90% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,301 psi | 85% | 2943 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,588 psi | 78% | 2841 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,709 psi | 89% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,868 psi | 88% | 2897 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,443 psi | 79% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,650 psi | 86% | 2841 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 2700 | <<locked>> | 80% | 46,224 psi | 74% | 2635 fps | 97.5% |
| Accurate 3100 | <<locked>> | 84% | 33,228 psi | 53% | 2448 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,256 psi | 82% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,363 psi | 63% | 2602 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 98% | 52,489 psi | 84% | 2917 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,950 psi | 77% | 2700 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,654 psi | 65% | 2641 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 47,181 psi | 76% | 2802 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,689 psi | 78% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,967 psi | 83% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,058 psi | 61% | 2608 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,323 psi | 69% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,292 psi | 65% | 2631 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,553 psi | 65% | 2680 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,094 psi | 45% | 2369 fps | 97% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,879 psi | 51% | 2490 fps | 95.4% |
| Alliant Reloder-26 | 64.6 gr | 80% | 30,023 psi | 48% | 2477 fps | 95.3% |
| Bofors RP15 | <<locked>> | 92% | 40,161 psi | 64% | 2671 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,342 psi | 79% | 2740 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,553 psi | 65% | 2680 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 43,149 psi | 69% | 2615 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 49,472 psi | 79% | 2749 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 44,831 psi | 72% | 2720 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 40,524 psi | 65% | 2595 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 49,705 psi | 80% | 2795 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,487 psi | 79% | 2789 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,665 psi | 57% | 2500 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,952 psi | 82% | 2792 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,074 psi | 64% | 2743 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,103 psi | 64% | 2657 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 44% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,531 psi | 81% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,268 psi | 76% | 2680 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,296 psi | 74% | 2654 fps | 98.2% |
| IMR 4350 | <<locked>> | 80% | 38,783 psi | 62% | 2543 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,512 psi | 71% | 2644 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 34,374 psi | 55% | 2477 fps | 97.7% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,936 psi | 78% | 2743 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 45,179 psi | 72% | 2776 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 50,908 psi | 82% | 2730 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,047 psi | 67% | 2595 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 40,248 psi | 65% | 2575 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 32,358 psi | 52% | 2428 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,314 psi | 82% | 2782 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,915 psi | 66% | 2625 fps | 95% |
| Norma MRP | 67.4 gr | 86% | 37,188 psi | 60% | 2635 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 38,914 psi | 62% | 2595 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,793 psi | 83% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 44,309 psi | 71% | 2769 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,884 psi | 61% | 2585 fps | 97% |
| Ramshot Magnum | <<locked>> | 90% | 38,261 psi | 61% | 2618 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,833 psi | 45% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,356 psi | 79% | 2736 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,006 psi | 74% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,175 psi | 63% | 2621 fps | 98.6% |
| ReloadSwiss RS 70 | 64 gr | 80% | 37,768 psi | 61% | 2625 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,014 psi | 59% | 2664 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 52,547 psi | 84% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,267 psi | 74% | 2684 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,904 psi | 72% | 2677 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 42,163 psi | 68% | 2674 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 43,149 psi | 69% | 2615 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,047 psi | 67% | 2595 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 50,908 psi | 82% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,248 psi | 65% | 2575 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,601 psi | 76% | 2740 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,282 psi | 76% | 2585 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,075 psi | 66% | 2539 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,771 psi | 67% | 2667 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 46,543 psi | 75% | 2684 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,008 psi | 79% | 2723 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,563 psi | 57% | 2552 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,579 psi | 60% | 2546 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 41,945 psi | 67% | 2651 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 80% | 52,837 psi | 85% | 2654 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,373 psi | 84% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,958 psi | 64% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,003 psi | 67% | 2621 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 90% | 38,232 psi | 61% | 2552 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 52,170 psi | 84% | 2733 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,627 psi | 68% | 2667 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,125 psi | 50% | 2444 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 94% | 46,760 psi | 75% | 2822 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 45,281 psi | 73% | 2779 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,494 psi | 63% | 2562 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 44,831 psi | 72% | 2720 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,874 psi | 40% | 2343 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,207 psi | 69% | 2661 fps | 95.9% |
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 88 powders for .300 Win. Mag. loaded with the .308 | 180gr | Remington PSP Core-Lokt. Alliant Reloder-26 delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,775 fps to 2,986 fps. Accurate MAGPRO gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate MAGPRO, Alliant Reloder-23, Alliant Reloder-25 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. Norma MRP, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Remington PSP Core-Lokt 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.