Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 175gr | Nosler Custom Competition 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% | 55,753 psi | 89% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 53,127 psi | 85% | 2792 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,679 psi | 88% | 2890 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 56,014 psi | 90% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,185 psi | 85% | 2884 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 56,072 psi | 90% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,201 psi | 87% | 2927 fps | 98% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,376 psi | 89% | 2976 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,521 psi | 89% | 2986 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,548 psi | 86% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,664 psi | 86% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,969 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,158 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,650 psi | 86% | 2917 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2972 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,343 psi | 82% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,628 psi | 72% | 2828 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,245 psi | 89% | 3048 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,777 psi | 80% | 2894 fps | 97.3% |
| Bofors RP3 | <<locked>> | 84% | 54,331 psi | 87% | 2854 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,346 psi | 87% | 2972 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 53,577 psi | 86% | 2835 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,505 psi | 87% | 2867 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 55,463 psi | 89% | 2940 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 88% | 54,998 psi | 88% | 2894 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 98% | 55,593 psi | 89% | 2920 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,360 psi | 87% | 2900 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,302 psi | 87% | 2867 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,796 psi | 89% | 2904 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,700 psi | 70% | 2858 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 90% | 55,666 psi | 89% | 2976 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,506 psi | 59% | 1791 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,390 psi | 89% | 2844 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,621 psi | 88% | 2828 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 54,505 psi | 87% | 2867 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,361 psi | 89% | 2867 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 53,795 psi | 86% | 2881 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,042 psi | 88% | 2884 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,751 psi | 86% | 2858 fps | 96.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,982 psi | 85% | 2949 fps | 96.7% |
| Lovex S062 | <<locked>> | 84% | 55,782 psi | 89% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,434 psi | 89% | 2861 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,272 psi | 85% | 2848 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,469 psi | 73% | 2740 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 52,968 psi | 85% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,259 psi | 89% | 2920 fps | 98% |
| Norma MRP | <<locked>> | 98% | 54,012 psi | 87% | 3002 fps | 99.2% |
| Norma URP | <<locked>> | 92% | 55,593 psi | 89% | 2927 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,679 psi | 86% | 2867 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,229 psi | 85% | 2963 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 92% | 54,259 psi | 87% | 2923 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,427 psi | 76% | 2835 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,217 psi | 60% | 1834 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,505 psi | 87% | 2851 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,723 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,040 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,361 psi | 89% | 2995 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,743 psi | 70% | 2854 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 82% | 54,273 psi | 87% | 2802 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,418 psi | 87% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,985 psi | 90% | 2900 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 98% | 56,391 psi | 90% | 2959 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 53,577 psi | 86% | 2835 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,434 psi | 89% | 2861 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 55,782 psi | 89% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,272 psi | 85% | 2848 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,796 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,288 psi | 89% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,114 psi | 88% | 2815 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,898 psi | 90% | 2953 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 54,389 psi | 87% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,940 psi | 86% | 2835 fps | 96% |
| Somchem S365 | <<locked>> | 94% | 54,882 psi | 88% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,374 psi | 86% | 2877 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 54,679 psi | 88% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,752 psi | 88% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,506 psi | 89% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,998 psi | 87% | 2867 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,634 psi | 84% | 2851 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 84% | 56,434 psi | 90% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,301 psi | 85% | 2871 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 53,896 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,288 psi | 87% | 2986 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,592 psi | 86% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,463 psi | 89% | 2940 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,630 psi | 75% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,447 psi | 86% | 2871 fps | 97.8% |
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% | 52,199 psi | 84% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,850 psi | 80% | 2736 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 34,127 psi | 55% | 2500 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 49,414 psi | 79% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,739 psi | 61% | 2598 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,644 psi | 75% | 2710 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 44,628 psi | 72% | 2753 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 48,428 psi | 78% | 2854 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,648 psi | 83% | 2927 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,036 psi | 75% | 2733 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,299 psi | 81% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,811 psi | 59% | 2612 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,669 psi | 67% | 2736 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,135 psi | 71% | 2743 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,553 psi | 67% | 2736 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,963 psi | 43% | 2359 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,648 psi | 52% | 2539 fps | 95.2% |
| Alliant Reloder-26 | 65.4 gr | 82% | 30,922 psi | 50% | 2533 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 43,787 psi | 70% | 2779 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,630 psi | 76% | 2746 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,553 psi | 67% | 2736 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 41,742 psi | 67% | 2615 fps | 96.2% |
| Hodgdon H380 | <<locked>> | 80% | 47,877 psi | 77% | 2756 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 80% | 39,784 psi | 64% | 2648 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 42,714 psi | 68% | 2671 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 51,953 psi | 83% | 2864 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,821 psi | 81% | 2841 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,360 psi | 55% | 2507 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,315 psi | 84% | 2851 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,988 psi | 66% | 2792 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 38,711 psi | 62% | 2654 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 44% | 1601 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,066 psi | 79% | 2743 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,271 psi | 82% | 2772 fps | 98.7% |
| IMR 4350 | <<locked>> | 82% | 39,972 psi | 64% | 2598 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,178 psi | 69% | 2648 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 36,274 psi | 58% | 2552 fps | 97.9% |
| IMR 4895 | <<locked>> | 80% | 51,576 psi | 83% | 2831 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,430 psi | 81% | 2799 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 49,559 psi | 79% | 2887 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 49,298 psi | 79% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,683 psi | 65% | 2598 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 39,001 psi | 63% | 2579 fps | 96.2% |
| Lovex S071 | <<locked>> | 92% | 35,215 psi | 56% | 2526 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 49,632 psi | 80% | 2789 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,063 psi | 72% | 2740 fps | 95.8% |
| Norma MRP | 68.1 gr | 88% | 38,203 psi | 61% | 2690 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 37,608 psi | 60% | 2595 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 50,111 psi | 80% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,064 psi | 74% | 2831 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 36,332 psi | 58% | 2579 fps | 96% |
| Ramshot Magnum | <<locked>> | 96% | 41,075 psi | 66% | 2707 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 45% | 1640 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,848 psi | 77% | 2740 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,251 psi | 71% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,434 psi | 60% | 2615 fps | 97.9% |
| ReloadSwiss RS 70 | 63.2 gr | 80% | 36,434 psi | 58% | 2621 fps | 97.2% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,014 psi | 61% | 2713 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,126 psi | 82% | 2753 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,831 psi | 72% | 2694 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,195 psi | 74% | 2730 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 43,236 psi | 69% | 2726 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 41,742 psi | 67% | 2615 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,683 psi | 65% | 2598 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 49,298 psi | 79% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,001 psi | 63% | 2579 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,774 psi | 73% | 2743 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,977 psi | 74% | 2598 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,784 psi | 64% | 2539 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,830 psi | 69% | 2720 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 45,005 psi | 72% | 2690 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,705 psi | 81% | 2779 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,040 psi | 55% | 2552 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 38,450 psi | 62% | 2595 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,387 psi | 82% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,590 psi | 83% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,047 psi | 69% | 2621 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,943 psi | 62% | 2595 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 40,437 psi | 65% | 2628 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 49,792 psi | 80% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,421 psi | 62% | 2595 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 29,660 psi | 48% | 2438 fps | 96.1% |
| Vihtavuori N560 | <<locked>> | 96% | 50,778 psi | 81% | 2927 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,000 psi | 61% | 2562 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 39,784 psi | 64% | 2648 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,483 psi | 41% | 2388 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,453 psi | 70% | 2697 fps | 95.5% |
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 94 powders for .300 Win. Mag. loaded with the .308 | 175gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,791 fps to 3,048 fps. Accurate 3100 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.308" calls for a 1:13.5 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 | 175gr | Nosler Custom Competition 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.