Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Winchester Silvertip bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO and Norma MRP.
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 3100 | <<locked>> | 98% | 55,782 psi | 89% | 2881 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 56,217 psi | 90% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,867 psi | 86% | 2867 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,070 psi | 87% | 2963 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 55,999 psi | 90% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,520 psi | 87% | 2910 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 55,985 psi | 90% | 2969 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,595 psi | 62% | 2680 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,548 psi | 86% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,549 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,840 psi | 90% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,012 psi | 87% | 2900 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,448 psi | 89% | 2966 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,617 psi | 78% | 2884 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,475 psi | 84% | 2972 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,375 psi | 87% | 2946 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 54,360 psi | 87% | 2825 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,498 psi | 71% | 2802 fps | 95.9% |
| Bofors RP5 | <<locked>> | 98% | 55,448 psi | 89% | 2966 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 53,650 psi | 86% | 2815 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,153 psi | 77% | 2822 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 54,549 psi | 87% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,840 psi | 90% | 2920 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 55,332 psi | 89% | 2877 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 56,086 psi | 90% | 2910 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,868 psi | 88% | 2890 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,056 psi | 88% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,543 psi | 76% | 2923 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 88% | 56,057 psi | 90% | 2956 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,767 psi | 59% | 1791 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,434 psi | 89% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,882 psi | 88% | 2854 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,056 psi | 88% | 2841 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 54,302 psi | 87% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,838 psi | 86% | 2838 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 53,563 psi | 86% | 2943 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 55,709 psi | 89% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,492 psi | 89% | 2838 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,417 psi | 86% | 2828 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,617 psi | 80% | 2785 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 56,362 psi | 90% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,564 psi | 89% | 2904 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 55,027 psi | 88% | 2989 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 56,043 psi | 90% | 2904 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,954 psi | 87% | 2959 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 54,766 psi | 88% | 2907 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,011 psi | 83% | 2894 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 60% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,360 psi | 87% | 2828 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,332 psi | 89% | 2933 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,824 psi | 86% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,753 psi | 89% | 2972 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,732 psi | 77% | 2920 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 54,636 psi | 88% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,144 psi | 90% | 2884 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 53,461 psi | 86% | 2887 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 53,650 psi | 86% | 2815 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,492 psi | 89% | 2838 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,709 psi | 89% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,417 psi | 86% | 2828 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,043 psi | 90% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,998 psi | 88% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,853 psi | 88% | 2792 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,011 psi | 85% | 2884 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 54,505 psi | 87% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,346 psi | 87% | 2825 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 55,854 psi | 90% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,983 psi | 87% | 2864 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 55,608 psi | 89% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,476 psi | 87% | 2844 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,548 psi | 86% | 2844 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,333 psi | 90% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 53,664 psi | 86% | 2851 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,940 psi | 88% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,056 psi | 88% | 2976 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,763 psi | 81% | 2887 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,867 psi | 86% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,840 psi | 90% | 2920 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,359 psi | 84% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,969 psi | 87% | 2858 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 3100 | <<locked>> | 82% | 32,387 psi | 52% | 2431 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 52,866 psi | 85% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,031 psi | 66% | 2641 fps | 99.2% |
| Accurate MAGPRO | 77.7 gr | 94% | 50,459 psi | 81% | 2900 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,327 psi | 79% | 2733 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,076 psi | 67% | 2680 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 45,803 psi | 73% | 2782 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 36,318 psi | 58% | 2621 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,372 psi | 81% | 2759 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,421 psi | 63% | 2648 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,121 psi | 72% | 2769 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,785 psi | 67% | 2674 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,566 psi | 63% | 2667 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,167 psi | 47% | 2408 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,053 psi | 50% | 2474 fps | 95.2% |
| Alliant Reloder-26 | 66.8 gr | 80% | 31,314 psi | 50% | 2520 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 41,785 psi | 67% | 2713 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,807 psi | 81% | 2772 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,713 psi | 67% | 2743 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 39,566 psi | 63% | 2667 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,382 psi | 71% | 2648 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 44,889 psi | 72% | 2759 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 51,039 psi | 82% | 2785 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,772 psi | 69% | 2687 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,440 psi | 73% | 2703 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 48,907 psi | 78% | 2789 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,066 psi | 77% | 2776 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,057 psi | 59% | 2536 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,059 psi | 63% | 2726 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,684 psi | 67% | 2700 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 44% | 1598 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,909 psi | 83% | 2766 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,943 psi | 64% | 2579 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,759 psi | 73% | 2677 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 39,262 psi | 63% | 2592 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,688 psi | 76% | 2733 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 46,862 psi | 75% | 2818 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,402 psi | 84% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,352 psi | 70% | 2631 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,669 psi | 67% | 2615 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 31,662 psi | 51% | 2411 fps | 95% |
| Norma 203B | <<locked>> | 80% | 52,997 psi | 85% | 2815 fps | 100% |
| Norma 204 | <<locked>> | 82% | 42,395 psi | 68% | 2664 fps | 95.7% |
| Norma MRP | 68.1 gr | 84% | 36,172 psi | 58% | 2615 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,495 psi | 65% | 2631 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 43,598 psi | 70% | 2766 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 39,291 psi | 63% | 2618 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 38,870 psi | 62% | 2641 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,108 psi | 45% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,952 psi | 82% | 2772 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,877 psi | 77% | 2822 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,683 psi | 65% | 2657 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,204 psi | 63% | 2667 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,984 psi | 58% | 2644 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 47,979 psi | 77% | 2720 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,584 psi | 70% | 2661 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 40,973 psi | 66% | 2654 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,382 psi | 71% | 2648 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,352 psi | 70% | 2631 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 52,402 psi | 84% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,669 psi | 67% | 2615 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,153 psi | 79% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,704 psi | 78% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,453 psi | 68% | 2575 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,596 psi | 65% | 2651 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,964 psi | 77% | 2717 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,442 psi | 76% | 2707 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 37,028 psi | 59% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,506 psi | 59% | 2526 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 45,919 psi | 74% | 2644 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,916 psi | 67% | 2631 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 38,450 psi | 62% | 2566 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 52,837 psi | 85% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,278 psi | 66% | 2631 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 32,445 psi | 52% | 2480 fps | 97.7% |
| Vihtavuori N560 | <<locked>> | 92% | 48,095 psi | 77% | 2854 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 47,427 psi | 76% | 2828 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,872 psi | 66% | 2598 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,946 psi | 69% | 2690 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,831 psi | 41% | 2388 fps | 96.9% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,828 psi | 65% | 2621 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 86 powders for .300 Win. Mag. loaded with the .308 | 180gr | Winchester Silvertip. Winchester StaBALL HD delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,015 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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, Accurate MAGPRO, Norma MRP rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Winchester Silvertip they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.