Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 165gr | Remington SP Extended-Range BT bullet and 86 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 Alliant Reloder-16.
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% | 55,695 psi | 89% | 2867 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,330 psi | 86% | 2881 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,114 psi | 88% | 2982 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 56,304 psi | 90% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,330 psi | 86% | 2976 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 56,188 psi | 90% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,404 psi | 87% | 3018 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 3071 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,622 psi | 89% | 3081 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,534 psi | 87% | 3015 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,563 psi | 86% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,693 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,157 psi | 87% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,405 psi | 89% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,795 psi | 86% | 3005 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,868 psi | 88% | 3068 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,648 psi | 83% | 2995 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,991 psi | 72% | 2917 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,738 psi | 89% | 3143 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,227 psi | 81% | 2982 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 54,389 psi | 87% | 2943 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,868 psi | 88% | 3068 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 53,766 psi | 86% | 2923 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 84% | 54,708 psi | 88% | 2959 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,666 psi | 89% | 3031 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 55,230 psi | 89% | 2986 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 55,970 psi | 90% | 3012 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,781 psi | 88% | 2995 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,650 psi | 88% | 2959 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,072 psi | 90% | 2999 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 55,869 psi | 90% | 3068 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 58% | 1864 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,695 psi | 89% | 2940 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,578 psi | 88% | 2917 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 54,795 psi | 88% | 2959 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,477 psi | 89% | 2956 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 53,867 psi | 86% | 2969 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,056 psi | 88% | 2976 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,925 psi | 86% | 2943 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,026 psi | 85% | 3035 fps | 96.3% |
| Lovex S062 | <<locked>> | 84% | 55,854 psi | 90% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,506 psi | 89% | 2949 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 53,505 psi | 86% | 2940 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,774 psi | 73% | 2825 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 53,011 psi | 85% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,521 psi | 89% | 3012 fps | 97.8% |
| Norma MRP | <<locked>> | 98% | 54,462 psi | 87% | 3094 fps | 99% |
| Norma URP | <<locked>> | 92% | 55,680 psi | 89% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,766 psi | 86% | 2959 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,563 psi | 86% | 3054 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 54,520 psi | 87% | 3015 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,848 psi | 77% | 2923 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,144 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,621 psi | 88% | 2943 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,926 psi | 88% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,316 psi | 85% | 2999 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,637 psi | 89% | 3087 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,976 psi | 71% | 2933 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 54,288 psi | 87% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,520 psi | 87% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,999 psi | 90% | 2986 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 52,968 psi | 85% | 2989 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 88% | 53,766 psi | 86% | 2923 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,506 psi | 89% | 2949 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 55,854 psi | 90% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,505 psi | 86% | 2940 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 56,014 psi | 90% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,361 psi | 89% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,259 psi | 89% | 2904 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,260 psi | 90% | 3048 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 54,505 psi | 87% | 2936 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,056 psi | 88% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,708 psi | 86% | 2966 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 54,824 psi | 88% | 2854 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,882 psi | 88% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,651 psi | 89% | 2910 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,172 psi | 87% | 2956 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2940 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 53,171 psi | 85% | 2861 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,548 psi | 86% | 2963 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,317 psi | 87% | 3025 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,737 psi | 88% | 3081 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,911 psi | 86% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,666 psi | 89% | 3031 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,746 psi | 75% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,766 psi | 86% | 2959 fps | 97.6% |
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% | 52,257 psi | 84% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,980 psi | 80% | 2822 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 36,564 psi | 59% | 2631 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 49,530 psi | 79% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,927 psi | 61% | 2680 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 46,572 psi | 75% | 2792 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,788 psi | 72% | 2835 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 98% | 52,156 psi | 84% | 3005 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,677 psi | 83% | 3015 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,773 psi | 72% | 2835 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,311 psi | 76% | 2825 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,459 psi | 81% | 2894 fps | 100% |
| Alliant Reloder-16 | 60.5 gr | 80% | 36,767 psi | 59% | 2687 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,800 psi | 67% | 2818 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,251 psi | 71% | 2825 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,643 psi | 72% | 2877 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,035 psi | 43% | 2428 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,809 psi | 56% | 2671 fps | 95.7% |
| Alliant Reloder-26 | 70.2 gr | 84% | 33,301 psi | 53% | 2671 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 44,019 psi | 71% | 2861 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,529 psi | 76% | 2831 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,643 psi | 72% | 2877 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 41,785 psi | 67% | 2697 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 47,921 psi | 77% | 2844 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 39,813 psi | 64% | 2726 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 42,627 psi | 68% | 2749 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 52,228 psi | 84% | 2949 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,097 psi | 82% | 2930 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,316 psi | 55% | 2579 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,257 psi | 84% | 2940 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,582 psi | 67% | 2795 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 44% | 1663 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,994 psi | 79% | 2831 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,387 psi | 82% | 2861 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 40,016 psi | 64% | 2677 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,178 psi | 69% | 2730 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 36,448 psi | 58% | 2631 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 51,779 psi | 83% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,560 psi | 81% | 2884 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 49,734 psi | 80% | 2972 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 49,385 psi | 79% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,756 psi | 65% | 2677 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 39,044 psi | 63% | 2654 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 35,346 psi | 57% | 2602 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 49,835 psi | 80% | 2881 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,295 psi | 73% | 2825 fps | 95.4% |
| Norma MRP | 71.4 gr | 88% | 38,421 psi | 62% | 2769 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 37,652 psi | 60% | 2674 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 50,140 psi | 80% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,806 psi | 80% | 2986 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,477 psi | 58% | 2657 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 41,249 psi | 66% | 2789 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,979 psi | 77% | 2825 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,382 psi | 71% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,550 psi | 60% | 2694 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,463 psi | 58% | 2697 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,944 psi | 66% | 2861 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 51,053 psi | 82% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,860 psi | 72% | 2779 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 49,385 psi | 79% | 2874 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 43,410 psi | 70% | 2812 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,785 psi | 67% | 2697 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,756 psi | 65% | 2677 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 49,385 psi | 79% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,044 psi | 63% | 2654 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,977 psi | 74% | 2831 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,035 psi | 74% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,914 psi | 64% | 2618 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,018 psi | 69% | 2802 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 45,049 psi | 72% | 2776 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 34,026 psi | 55% | 2628 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 41,263 psi | 66% | 2733 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 51,445 psi | 82% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,605 psi | 83% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,076 psi | 69% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,059 psi | 63% | 2677 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 43,337 psi | 69% | 2766 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,835 psi | 80% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,479 psi | 62% | 2674 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 29,733 psi | 48% | 2507 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 50,908 psi | 82% | 3012 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,174 psi | 61% | 2641 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 39,987 psi | 64% | 2730 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 27,253 psi | 44% | 2520 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,555 psi | 70% | 2772 fps | 95.1% |
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 | 165gr | Remington SP Extended-Range BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,143 fps. Accurate 3100 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 58–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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, Alliant Reloder-16 rank at the top here: for .300 Win. Mag. with the .308 | 165gr | Remington SP Extended-Range BT 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.