Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Norma VULKAN bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 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>> | 86% | 56,246 psi | 90% | 2799 fps | 99.1% |
| Accurate 3100 | <<locked>> | 98% | 53,447 psi | 86% | 2838 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 54,708 psi | 88% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 55,463 psi | 89% | 2884 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,420 psi | 90% | 2982 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 54,462 psi | 87% | 2805 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,202 psi | 90% | 2930 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 53,882 psi | 86% | 2923 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,332 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 55,463 psi | 89% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,159 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,766 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,622 psi | 89% | 2917 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,098 psi | 85% | 2920 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,838 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,601 psi | 75% | 2838 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,114 psi | 87% | 2992 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,069 psi | 83% | 2900 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 56,217 psi | 90% | 2844 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,098 psi | 85% | 2920 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 55,434 psi | 89% | 2831 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 82% | 52,823 psi | 85% | 2808 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,926 psi | 88% | 2897 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 90% | 55,332 psi | 89% | 2867 fps | 98.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 2854 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,953 psi | 85% | 2851 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,113 psi | 85% | 2815 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,404 psi | 87% | 2844 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2877 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 53,925 psi | 86% | 2917 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 59% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,969 psi | 87% | 2795 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,417 psi | 86% | 2782 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,506 psi | 89% | 2812 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 53,229 psi | 85% | 2815 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,519 psi | 86% | 2805 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 53,359 psi | 86% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,506 psi | 89% | 2858 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 55,434 psi | 89% | 2963 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 54,099 psi | 87% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,925 psi | 86% | 2805 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 55,230 psi | 89% | 2848 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2746 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 54,752 psi | 88% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,664 psi | 86% | 2864 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 52,837 psi | 85% | 2946 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 54,186 psi | 87% | 2871 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,477 psi | 89% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,303 psi | 89% | 2969 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 52,823 psi | 85% | 2867 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,304 psi | 90% | 2953 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 60% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,173 psi | 90% | 2844 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,200 psi | 85% | 2897 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,477 psi | 89% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,606 psi | 86% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,818 psi | 73% | 2874 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 56,043 psi | 90% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,376 psi | 90% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,331 psi | 87% | 2844 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 55,056 psi | 88% | 2907 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 55,434 psi | 89% | 2831 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,925 psi | 86% | 2805 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 54,099 psi | 87% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,230 psi | 89% | 2848 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,360 psi | 87% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,664 psi | 86% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,432 psi | 86% | 2759 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,592 psi | 88% | 2900 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 56,188 psi | 90% | 2835 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,985 psi | 90% | 2838 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 53,824 psi | 86% | 2874 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,622 psi | 89% | 2881 fps | 99.2% |
| Unknown powder | <<locked>> | 88% | 54,563 psi | 87% | 2871 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 56,188 psi | 90% | 2700 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 56,391 psi | 90% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,883 psi | 90% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,491 psi | 87% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,042 psi | 88% | 2841 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2825 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 55,579 psi | 89% | 2782 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 55,564 psi | 89% | 2890 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 56,434 psi | 90% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,330 psi | 86% | 2943 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,675 psi | 78% | 2844 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,753 psi | 89% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,926 psi | 88% | 2897 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,458 psi | 79% | 2972 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,708 psi | 86% | 2844 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% | 46,282 psi | 74% | 2635 fps | 97.5% |
| Accurate 3100 | <<locked>> | 84% | 33,286 psi | 53% | 2451 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,285 psi | 82% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,450 psi | 63% | 2605 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 98% | 52,504 psi | 84% | 2917 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 48,022 psi | 77% | 2703 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,712 psi | 65% | 2641 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 47,210 psi | 76% | 2802 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,776 psi | 78% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,054 psi | 83% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,130 psi | 61% | 2612 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,395 psi | 70% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,350 psi | 65% | 2635 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,814 psi | 65% | 2687 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,152 psi | 45% | 2372 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,923 psi | 51% | 2490 fps | 95.4% |
| Alliant Reloder-26 | 64.7 gr | 80% | 30,066 psi | 48% | 2480 fps | 95.4% |
| Bofors RP15 | <<locked>> | 92% | 40,263 psi | 65% | 2674 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,429 psi | 79% | 2743 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,814 psi | 65% | 2687 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,192 psi | 69% | 2615 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 49,545 psi | 79% | 2753 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 44,904 psi | 72% | 2723 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 40,611 psi | 65% | 2595 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 49,980 psi | 80% | 2799 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,545 psi | 79% | 2792 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,737 psi | 57% | 2503 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,024 psi | 82% | 2795 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 40,103 psi | 64% | 2743 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,147 psi | 64% | 2661 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 44% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,618 psi | 81% | 2743 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,355 psi | 76% | 2680 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,209 psi | 74% | 2651 fps | 98.2% |
| IMR 4350 | <<locked>> | 80% | 38,856 psi | 62% | 2546 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,585 psi | 71% | 2648 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 34,287 psi | 55% | 2474 fps | 97.7% |
| IMR 4955 Enduron | <<locked>> | 92% | 49,182 psi | 79% | 2749 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 45,223 psi | 73% | 2776 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 50,995 psi | 82% | 2733 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,134 psi | 68% | 2595 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 40,321 psi | 65% | 2579 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 32,416 psi | 52% | 2428 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,401 psi | 82% | 2782 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,973 psi | 66% | 2628 fps | 95% |
| Norma MRP | 67.5 gr | 86% | 37,231 psi | 60% | 2635 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 39,001 psi | 63% | 2595 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,866 psi | 83% | 2805 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 44,338 psi | 71% | 2769 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,956 psi | 61% | 2585 fps | 97% |
| Ramshot Magnum | <<locked>> | 90% | 38,493 psi | 62% | 2625 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 45% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,414 psi | 79% | 2736 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,093 psi | 74% | 2785 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,247 psi | 63% | 2621 fps | 98.6% |
| ReloadSwiss RS 70 | 64.1 gr | 80% | 37,826 psi | 61% | 2628 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,028 psi | 59% | 2664 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 52,591 psi | 84% | 2740 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,354 psi | 74% | 2687 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,962 psi | 72% | 2677 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 39,465 psi | 63% | 2615 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,192 psi | 69% | 2615 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,134 psi | 68% | 2595 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 50,995 psi | 82% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,321 psi | 65% | 2579 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,674 psi | 76% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,355 psi | 76% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,162 psi | 66% | 2539 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,829 psi | 67% | 2671 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 46,630 psi | 75% | 2687 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 49,037 psi | 79% | 2723 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,636 psi | 57% | 2556 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 37,637 psi | 60% | 2546 fps | 95.3% |
| Unknown powder | <<locked>> | 80% | 42,018 psi | 67% | 2651 fps | 98.8% |
| Vihtavuori N133 | <<locked>> | 80% | 52,939 psi | 85% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,026 psi | 85% | 2703 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,460 psi | 84% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,045 psi | 64% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,076 psi | 67% | 2625 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 90% | 38,305 psi | 61% | 2556 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,257 psi | 84% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,714 psi | 68% | 2667 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,169 psi | 50% | 2444 fps | 97.1% |
| Vihtavuori N560 | <<locked>> | 94% | 46,804 psi | 75% | 2825 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 45,310 psi | 73% | 2782 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,552 psi | 63% | 2566 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 44,904 psi | 72% | 2723 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,918 psi | 40% | 2346 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 40,248 psi | 65% | 2602 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 89 powders for .300 Win. Mag. loaded with the .308 | 180gr | Norma VULKAN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,992 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,992 fps. Accurate MAGPRO gives the best case fill at 100 %, and 89 of the 89 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, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Norma VULKAN 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.