Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 180gr | Sierra HP MatchKing bullet and 87 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 2495 | <<locked>> | 82% | 56,318 psi | 90% | 2743 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,693 psi | 86% | 2762 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,463 psi | 89% | 2861 fps | 99.8% |
| Accurate 4064 | <<locked>> | 82% | 53,301 psi | 85% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,969 psi | 87% | 2858 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,824 psi | 86% | 2946 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 53,301 psi | 85% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,810 psi | 88% | 2900 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,072 psi | 90% | 2953 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,275 psi | 90% | 2956 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,128 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,157 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,665 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,999 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,244 psi | 87% | 2890 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2946 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,330 psi | 84% | 2881 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,426 psi | 73% | 2808 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,188 psi | 90% | 3022 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,705 psi | 81% | 2874 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 54,984 psi | 88% | 2822 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,100 psi | 88% | 2946 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 54,143 psi | 87% | 2805 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,114 psi | 88% | 2835 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 56,043 psi | 90% | 2907 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 55,680 psi | 89% | 2867 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 56,289 psi | 90% | 2897 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,259 psi | 89% | 2877 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,085 psi | 88% | 2838 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,295 psi | 71% | 2838 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 56,434 psi | 90% | 2946 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 58% | 1762 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,130 psi | 90% | 2815 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,085 psi | 88% | 2799 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,230 psi | 89% | 2841 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,941 psi | 90% | 2835 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 54,346 psi | 87% | 2848 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,608 psi | 89% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,259 psi | 87% | 2828 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2923 fps | 97.1% |
| Lovex S062 | <<locked>> | 84% | 56,289 psi | 90% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,072 psi | 90% | 2831 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 53,940 psi | 86% | 2822 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 2717 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 53,490 psi | 86% | 2812 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,072 psi | 90% | 2894 fps | 98.3% |
| Norma MRP | <<locked>> | 98% | 54,853 psi | 88% | 2976 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 56,144 psi | 90% | 2894 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,346 psi | 87% | 2838 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2940 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,085 psi | 88% | 2897 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,211 psi | 77% | 2815 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,159 psi | 60% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,158 psi | 88% | 2822 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,579 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,896 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,028 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,280 psi | 71% | 2831 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 54,984 psi | 88% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,071 psi | 88% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,142 psi | 85% | 2818 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 53,548 psi | 86% | 2877 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,143 psi | 87% | 2805 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,072 psi | 90% | 2831 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,289 psi | 90% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,940 psi | 86% | 2822 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,953 psi | 85% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,767 psi | 89% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,550 psi | 89% | 2782 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,127 psi | 85% | 2871 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 54,955 psi | 88% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,607 psi | 88% | 2808 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 55,825 psi | 90% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,215 psi | 87% | 2854 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 55,390 psi | 89% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,521 psi | 89% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,144 psi | 90% | 2785 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,752 psi | 88% | 2838 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,316 psi | 85% | 2825 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 53,534 psi | 86% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,824 psi | 86% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,824 psi | 88% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,071 psi | 88% | 2963 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,186 psi | 87% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 56,260 psi | 90% | 2913 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,224 psi | 76% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,128 psi | 87% | 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 2495 | <<locked>> | 80% | 52,895 psi | 85% | 2697 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,314 psi | 81% | 2707 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 32,314 psi | 52% | 2425 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,125 psi | 80% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,435 psi | 62% | 2579 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 50,270 psi | 81% | 2884 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,036 psi | 75% | 2677 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,308 psi | 68% | 2671 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 96% | 49,168 psi | 79% | 2831 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,315 psi | 84% | 2897 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,688 psi | 76% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,995 psi | 82% | 2776 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,188 psi | 60% | 2585 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,221 psi | 68% | 2710 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,901 psi | 67% | 2661 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,250 psi | 68% | 2713 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,412 psi | 44% | 2346 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,953 psi | 53% | 2516 fps | 95.8% |
| Alliant Reloder-26 | 64.7 gr | 82% | 31,256 psi | 50% | 2513 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 41,640 psi | 67% | 2700 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,109 psi | 77% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,250 psi | 68% | 2713 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,308 psi | 68% | 2592 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,341 psi | 78% | 2726 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,263 psi | 65% | 2625 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,149 psi | 69% | 2644 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 49,110 psi | 79% | 2776 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,240 psi | 77% | 2762 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,751 psi | 56% | 2477 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,698 psi | 67% | 2779 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,059 psi | 63% | 2628 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 44% | 1575 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,458 psi | 79% | 2710 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,677 psi | 83% | 2743 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,840 psi | 61% | 2516 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,714 psi | 70% | 2621 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,854 psi | 59% | 2530 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 52,330 psi | 84% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,964 psi | 77% | 2720 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 46,862 psi | 75% | 2802 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,922 psi | 80% | 2710 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,220 psi | 66% | 2572 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,407 psi | 63% | 2552 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,533 psi | 54% | 2454 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 50,357 psi | 81% | 2762 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,728 psi | 69% | 2661 fps | 95.4% |
| Norma MRP | 65.9 gr | 86% | 36,158 psi | 58% | 2605 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,043 psi | 61% | 2569 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,691 psi | 81% | 2782 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,905 psi | 75% | 2815 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,941 psi | 59% | 2559 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 94% | 38,856 psi | 62% | 2628 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 45% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,327 psi | 77% | 2713 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,860 psi | 72% | 2762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,145 psi | 61% | 2595 fps | 98.3% |
| ReloadSwiss RS 70 | 62.6 gr | 80% | 36,927 psi | 59% | 2602 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,580 psi | 62% | 2697 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 51,735 psi | 83% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,252 psi | 73% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,804 psi | 75% | 2707 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 40,988 psi | 66% | 2644 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,308 psi | 68% | 2592 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,220 psi | 66% | 2572 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 49,922 psi | 80% | 2710 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,407 psi | 63% | 2552 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,485 psi | 75% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,514 psi | 75% | 2569 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,321 psi | 65% | 2516 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,596 psi | 65% | 2638 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,614 psi | 73% | 2664 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,227 psi | 82% | 2756 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,505 psi | 55% | 2526 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,189 psi | 63% | 2579 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,069 psi | 83% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,025 psi | 83% | 2697 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,482 psi | 70% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,537 psi | 63% | 2572 fps | 98.7% |
| Vihtavuori N165 | <<locked>> | 92% | 41,089 psi | 66% | 2608 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 50,241 psi | 81% | 2690 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,841 psi | 62% | 2569 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,226 psi | 48% | 2418 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 94% | 47,964 psi | 77% | 2838 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,508 psi | 62% | 2539 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,437 psi | 65% | 2625 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,817 psi | 41% | 2375 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,017 psi | 66% | 2615 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 87 powders for .300 Win. Mag. loaded with the .308 | 180gr | Sierra HP MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,762 fps to 3,022 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 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 180.0 gr projectile in 0.308" calls for a 1:13.0 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, ReloadSwiss RS 70 rank at the top here: for .300 Win. Mag. with the .308 | 180gr | Sierra HP MatchKing 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.