Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 185gr | Berger Hybrid Target bullet and 89 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.
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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 2495 | <<locked>> | 82% | 55,883 psi | 90% | 2690 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,388 psi | 86% | 2713 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,694 psi | 88% | 2808 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 56,304 psi | 90% | 2746 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,258 psi | 85% | 2802 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,040 psi | 85% | 2890 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 56,188 psi | 90% | 2779 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,186 psi | 87% | 2844 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2897 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,376 psi | 89% | 2897 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,592 psi | 86% | 2753 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,635 psi | 86% | 2772 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,998 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,376 psi | 89% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,635 psi | 86% | 2835 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2894 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,459 psi | 83% | 2825 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,657 psi | 72% | 2753 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,100 psi | 88% | 2963 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,995 psi | 80% | 2818 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 54,331 psi | 87% | 2769 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2894 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 53,621 psi | 86% | 2753 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 54,534 psi | 87% | 2782 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,492 psi | 89% | 2858 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 55,245 psi | 89% | 2815 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 55,608 psi | 89% | 2841 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,549 psi | 87% | 2825 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,447 psi | 87% | 2785 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,825 psi | 90% | 2815 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,743 psi | 70% | 2785 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 55,666 psi | 89% | 2894 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 59% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,434 psi | 90% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,593 psi | 89% | 2759 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,679 psi | 88% | 2746 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 54,694 psi | 88% | 2789 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,230 psi | 89% | 2779 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 53,722 psi | 86% | 2795 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,071 psi | 88% | 2799 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,693 psi | 86% | 2776 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,765 psi | 85% | 2864 fps | 97% |
| Lovex S062 | <<locked>> | 84% | 55,753 psi | 89% | 2753 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,376 psi | 89% | 2776 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 53,316 psi | 85% | 2766 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,629 psi | 73% | 2664 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 56,362 psi | 90% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,419 psi | 89% | 2841 fps | 98.3% |
| Norma MRP | <<locked>> | 98% | 53,896 psi | 86% | 2917 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 55,506 psi | 89% | 2841 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,563 psi | 86% | 2782 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,214 psi | 85% | 2884 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,418 psi | 87% | 2844 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,572 psi | 76% | 2762 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 60% | 1768 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,636 psi | 88% | 2769 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,839 psi | 88% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,127 psi | 85% | 2825 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,245 psi | 89% | 2907 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,584 psi | 70% | 2776 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 54,317 psi | 87% | 2717 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,433 psi | 87% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,883 psi | 90% | 2818 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 52,895 psi | 85% | 2822 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 53,621 psi | 86% | 2753 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,376 psi | 89% | 2776 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 55,753 psi | 89% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,316 psi | 85% | 2766 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,014 psi | 90% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,230 psi | 89% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,158 psi | 88% | 2733 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,014 psi | 90% | 2871 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 54,317 psi | 87% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,969 psi | 87% | 2756 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 54,926 psi | 88% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,403 psi | 86% | 2795 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 54,882 psi | 88% | 2677 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,955 psi | 88% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,593 psi | 89% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,085 psi | 87% | 2782 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2772 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 53,113 psi | 85% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,243 psi | 85% | 2789 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,882 psi | 86% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,186 psi | 87% | 2907 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,635 psi | 86% | 2753 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,695 psi | 89% | 2861 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,383 psi | 74% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,447 psi | 86% | 2792 fps | 98.1% |
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% | 52,431 psi | 84% | 2644 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,966 psi | 80% | 2657 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 34,142 psi | 55% | 2434 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 49,676 psi | 80% | 2654 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,855 psi | 61% | 2530 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 49,443 psi | 79% | 2828 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 46,615 psi | 75% | 2628 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,887 psi | 67% | 2621 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 48,457 psi | 78% | 2776 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,634 psi | 83% | 2841 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,297 psi | 76% | 2654 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,415 psi | 81% | 2720 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,825 psi | 59% | 2536 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,814 psi | 67% | 2661 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,466 psi | 66% | 2615 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,800 psi | 67% | 2664 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,108 psi | 43% | 2303 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,663 psi | 52% | 2474 fps | 95.8% |
| Alliant Reloder-26 | 62.7 gr | 82% | 30,908 psi | 50% | 2467 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 41,031 psi | 66% | 2648 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,572 psi | 76% | 2664 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,800 psi | 67% | 2664 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 41,930 psi | 67% | 2543 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,848 psi | 77% | 2674 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 39,813 psi | 64% | 2572 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 42,685 psi | 68% | 2592 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 48,559 psi | 78% | 2723 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,879 psi | 82% | 2766 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,330 psi | 55% | 2431 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,199 psi | 84% | 2762 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,089 psi | 66% | 2723 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 38,711 psi | 62% | 2582 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 44% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,040 psi | 85% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,023 psi | 79% | 2661 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,387 psi | 82% | 2694 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 37,507 psi | 60% | 2470 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,192 psi | 69% | 2572 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,347 psi | 58% | 2480 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 51,692 psi | 83% | 2746 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,471 psi | 76% | 2671 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 46,354 psi | 74% | 2749 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,458 psi | 79% | 2661 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,872 psi | 66% | 2526 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,073 psi | 63% | 2507 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 33,011 psi | 53% | 2405 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 49,748 psi | 80% | 2707 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,264 psi | 68% | 2608 fps | 95.4% |
| Norma MRP | 63.8 gr | 86% | 35,650 psi | 57% | 2556 fps | 95% |
| Norma URP | <<locked>> | 80% | 37,695 psi | 60% | 2523 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,096 psi | 80% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,267 psi | 74% | 2759 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,521 psi | 59% | 2510 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 38,305 psi | 61% | 2575 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 44% | 1578 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,921 psi | 77% | 2661 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,411 psi | 71% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,565 psi | 60% | 2546 fps | 98.3% |
| ReloadSwiss RS 70 | 60.6 gr | 80% | 36,434 psi | 58% | 2549 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,014 psi | 61% | 2644 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,242 psi | 82% | 2671 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,860 psi | 72% | 2615 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,180 psi | 74% | 2654 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 40,509 psi | 65% | 2595 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,930 psi | 67% | 2543 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,872 psi | 66% | 2526 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 49,458 psi | 79% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,073 psi | 63% | 2507 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,035 psi | 74% | 2667 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,050 psi | 74% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,856 psi | 64% | 2467 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,132 psi | 64% | 2589 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,194 psi | 72% | 2615 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,575 psi | 81% | 2700 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,113 psi | 55% | 2480 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,537 psi | 62% | 2526 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 51,445 psi | 82% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,648 psi | 83% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,105 psi | 69% | 2543 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,044 psi | 63% | 2523 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 92% | 40,437 psi | 65% | 2556 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,748 psi | 80% | 2638 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,392 psi | 62% | 2523 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 29,849 psi | 48% | 2375 fps | 96.7% |
| Vihtavuori N560 | <<locked>> | 94% | 47,456 psi | 76% | 2785 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,072 psi | 61% | 2490 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,001 psi | 64% | 2579 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,946 psi | 38% | 2267 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,567 psi | 65% | 2562 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 96 powders for .300 Win. Mag. loaded with the .308 | 185gr | Berger Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 2,963 fps; across all powders the maximum-charge window runs from 1,729 fps to 2,963 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2217 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 | 185gr | Berger Hybrid Target they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.