Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Norma PlastSpitz bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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>> | 82% | 54,288 psi | 87% | 2776 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 52,765 psi | 85% | 2825 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 54,070 psi | 87% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,650 psi | 88% | 2871 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,853 psi | 88% | 2963 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 53,722 psi | 86% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,593 psi | 89% | 2917 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,301 psi | 85% | 2907 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,810 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,911 psi | 88% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,376 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,026 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,998 psi | 88% | 2904 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,130 psi | 90% | 2966 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2894 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,108 psi | 74% | 2825 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,171 psi | 85% | 2979 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,474 psi | 83% | 2890 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,680 psi | 89% | 2835 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,130 psi | 90% | 2966 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 54,781 psi | 88% | 2818 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,782 psi | 89% | 2848 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,330 psi | 86% | 2867 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 53,055 psi | 85% | 2828 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 53,301 psi | 85% | 2851 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,999 psi | 90% | 2894 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,738 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,150 psi | 72% | 2858 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 53,258 psi | 85% | 2904 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 59% | 1772 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,330 psi | 86% | 2776 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,738 psi | 89% | 2812 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,043 psi | 90% | 2858 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,098 psi | 85% | 2795 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 55,230 psi | 89% | 2864 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,318 psi | 90% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,969 psi | 88% | 2844 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,404 psi | 87% | 2940 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 53,519 psi | 86% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,214 psi | 85% | 2792 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,578 psi | 88% | 2835 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,862 psi | 75% | 2726 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,215 psi | 87% | 2825 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,026 psi | 85% | 2848 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 55,854 psi | 90% | 2992 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 53,432 psi | 86% | 2854 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,998 psi | 88% | 2851 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,013 psi | 88% | 2959 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 55,883 psi | 90% | 2913 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,023 psi | 79% | 2831 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 60% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,753 psi | 89% | 2835 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,333 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,520 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,982 psi | 85% | 2920 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,005 psi | 72% | 2851 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 55,477 psi | 89% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,796 psi | 89% | 2831 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,679 psi | 86% | 2828 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 54,389 psi | 87% | 2890 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,781 psi | 88% | 2818 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,214 psi | 85% | 2792 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,519 psi | 86% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,578 psi | 88% | 2835 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,606 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,142 psi | 85% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,362 psi | 90% | 2799 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,925 psi | 86% | 2887 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 55,666 psi | 89% | 2825 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,448 psi | 89% | 2825 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 53,026 psi | 85% | 2861 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,984 psi | 88% | 2867 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 55,985 psi | 90% | 2740 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,970 psi | 90% | 2753 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 53,447 psi | 86% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,376 psi | 89% | 2848 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,244 psi | 87% | 2841 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,201 psi | 87% | 2749 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,592 psi | 88% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,724 psi | 89% | 2920 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,086 psi | 90% | 2982 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,940 psi | 88% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,330 psi | 86% | 2867 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,414 psi | 78% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,085 psi | 88% | 2861 fps | 98.4% |
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% | 50,937 psi | 82% | 2720 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,866 psi | 53% | 2438 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,691 psi | 81% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,899 psi | 62% | 2592 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 51,024 psi | 82% | 2900 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,688 psi | 76% | 2694 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,815 psi | 69% | 2684 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,630 psi | 75% | 2789 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,211 psi | 77% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,488 psi | 83% | 2785 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,811 psi | 61% | 2602 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,873 psi | 69% | 2723 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,627 psi | 68% | 2677 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,219 psi | 64% | 2671 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,760 psi | 45% | 2356 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,430 psi | 50% | 2474 fps | 95% |
| Alliant Reloder-26 | 64 gr | 80% | 29,704 psi | 48% | 2464 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 42,380 psi | 68% | 2717 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,863 psi | 78% | 2730 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,219 psi | 64% | 2671 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,714 psi | 68% | 2605 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,008 psi | 79% | 2743 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,886 psi | 66% | 2638 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,758 psi | 70% | 2657 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 49,835 psi | 80% | 2792 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,965 psi | 79% | 2779 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,375 psi | 57% | 2493 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,624 psi | 64% | 2730 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,740 psi | 64% | 2648 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,427 psi | 44% | 1581 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,183 psi | 80% | 2726 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,330 psi | 84% | 2756 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 38,392 psi | 62% | 2533 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,150 psi | 71% | 2635 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 37,333 psi | 60% | 2543 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 52,808 psi | 85% | 2812 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,646 psi | 78% | 2733 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 47,558 psi | 76% | 2818 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,401 psi | 81% | 2720 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,669 psi | 67% | 2582 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 40,001 psi | 64% | 2566 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 34,098 psi | 55% | 2467 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 50,836 psi | 82% | 2769 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,294 psi | 69% | 2674 fps | 95.7% |
| Norma MRP | 66.7 gr | 86% | 36,651 psi | 59% | 2621 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,682 psi | 62% | 2585 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,358 psi | 82% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,208 psi | 71% | 2762 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,362 psi | 60% | 2569 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,436 psi | 63% | 2641 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 45% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,936 psi | 78% | 2726 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,513 psi | 73% | 2776 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,566 psi | 62% | 2605 fps | 98.4% |
| ReloadSwiss RS 70 | 63.4 gr | 80% | 37,405 psi | 60% | 2615 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,492 psi | 59% | 2644 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 52,228 psi | 84% | 2733 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,963 psi | 74% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,340 psi | 76% | 2720 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,742 psi | 67% | 2661 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,714 psi | 68% | 2605 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,669 psi | 67% | 2582 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 50,401 psi | 81% | 2720 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,001 psi | 64% | 2566 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,949 psi | 75% | 2726 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,021 psi | 75% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,727 psi | 65% | 2530 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,365 psi | 66% | 2657 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,064 psi | 74% | 2674 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,515 psi | 78% | 2710 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,143 psi | 56% | 2543 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,188 psi | 60% | 2536 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 52,649 psi | 84% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,750 psi | 85% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,121 psi | 71% | 2605 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,987 psi | 64% | 2582 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,928 psi | 62% | 2566 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,908 psi | 82% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,450 psi | 63% | 2585 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,690 psi | 49% | 2431 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 48,892 psi | 78% | 2858 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,015 psi | 63% | 2552 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,886 psi | 66% | 2638 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,497 psi | 39% | 2326 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,727 psi | 67% | 2628 fps | 95.4% |
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 85 powders for .300 Win. Mag. loaded with the .308 | 180gr | Norma PlastSpitz. Norma MRP delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,992 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 85 of the 85 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 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, 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. Alliant Reloder-26, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Norma PlastSpitz 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.