Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Woodleigh HS bullet and 80 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 Accurate High Country.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 54,418 psi | 89% | 2910 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 52,837 psi | 87% | 2904 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,967 psi | 85% | 2999 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 96% | 52,924 psi | 87% | 2999 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 55,085 psi | 90% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,635 psi | 88% | 2949 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,955 psi | 90% | 3005 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,826 psi | 62% | 2720 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,853 psi | 88% | 2946 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,649 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,577 psi | 88% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,549 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,156 psi | 87% | 2940 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,259 psi | 89% | 3002 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,882 psi | 90% | 2976 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,645 psi | 78% | 2920 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,100 psi | 90% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,040 psi | 87% | 2982 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 53,374 psi | 88% | 2858 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,497 psi | 71% | 2838 fps | 96.2% |
| Bofors RP5 | <<locked>> | 98% | 54,259 psi | 89% | 3002 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 52,808 psi | 87% | 2848 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,007 psi | 77% | 2854 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 53,635 psi | 88% | 2877 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,708 psi | 90% | 2956 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 54,186 psi | 89% | 2910 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 55,027 psi | 90% | 2946 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,824 psi | 88% | 2927 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,853 psi | 88% | 2881 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,586 psi | 76% | 2963 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 88% | 54,897 psi | 90% | 2992 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 60% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,505 psi | 89% | 2854 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,867 psi | 88% | 2887 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,230 psi | 89% | 2874 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 53,113 psi | 87% | 2890 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,069 psi | 87% | 2877 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 98% | 52,489 psi | 86% | 2979 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 54,781 psi | 90% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,636 psi | 90% | 2874 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,562 psi | 86% | 2864 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,486 psi | 80% | 2818 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 54,447 psi | 89% | 2940 fps | 98.7% |
| Norma MRP | <<locked>> | 96% | 53,780 psi | 88% | 3025 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 54,882 psi | 90% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,866 psi | 87% | 2995 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 53,621 psi | 88% | 2940 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,705 psi | 83% | 2927 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 61% | 1854 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,534 psi | 88% | 2864 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,983 psi | 89% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,605 psi | 86% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,578 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2959 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 53,664 psi | 88% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,085 psi | 90% | 2917 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 52,359 psi | 86% | 2923 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 52,808 psi | 87% | 2848 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,636 psi | 90% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,781 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,562 psi | 86% | 2864 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,100 psi | 90% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,317 psi | 89% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,085 psi | 89% | 2828 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,909 psi | 85% | 2917 fps | 98.6% |
| Somchem S355 | <<locked>> | 84% | 53,592 psi | 88% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,171 psi | 87% | 2854 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 54,549 psi | 90% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,895 psi | 87% | 2897 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 54,723 psi | 90% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,519 psi | 88% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,243 psi | 86% | 2874 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 52,547 psi | 86% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,954 psi | 89% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,925 psi | 89% | 3015 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,676 psi | 82% | 2927 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,866 psi | 87% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,940 psi | 90% | 2959 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,865 psi | 84% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,924 psi | 87% | 2894 fps | 98.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 31,647 psi | 52% | 2467 fps | 95.6% |
| Accurate 4350 | <<locked>> | 80% | 40,103 psi | 66% | 2677 fps | 99.4% |
| Accurate High Country | 70.6 gr | 88% | 42,134 psi | 69% | 2808 fps | 95.3% |
| Accurate MAGPRO | 76.8 gr | 94% | 49,168 psi | 81% | 2933 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 48,689 psi | 80% | 2769 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,566 psi | 63% | 2654 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 92% | 44,904 psi | 74% | 2818 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 35,433 psi | 58% | 2657 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,885 psi | 64% | 2661 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,429 psi | 81% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,754 psi | 64% | 2684 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,193 psi | 73% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,493 psi | 63% | 2654 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,798 psi | 64% | 2703 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,631 psi | 47% | 2444 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,458 psi | 50% | 2513 fps | 95.6% |
| Alliant Reloder-26 | 66.1 gr | 80% | 30,618 psi | 50% | 2559 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 38,290 psi | 63% | 2690 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 50,067 psi | 82% | 2808 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,582 psi | 67% | 2776 fps | 95.2% |
| Bofors RP5 | <<locked>> | 88% | 38,798 psi | 64% | 2703 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,801 psi | 72% | 2687 fps | 97.7% |
| Hodgdon H1000 | <<locked>> | 96% | 41,104 psi | 67% | 2733 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 50,154 psi | 82% | 2822 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,916 psi | 69% | 2723 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,802 psi | 74% | 2743 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 44,904 psi | 74% | 2766 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,065 psi | 77% | 2808 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,361 psi | 60% | 2575 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,392 psi | 63% | 2772 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,930 psi | 67% | 2740 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 45% | 1617 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,184 psi | 84% | 2802 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,392 psi | 65% | 2615 fps | 96.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,165 psi | 74% | 2717 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,421 psi | 63% | 2625 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,775 psi | 77% | 2766 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 42,873 psi | 70% | 2792 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 51,474 psi | 85% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,743 psi | 70% | 2667 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 40,872 psi | 67% | 2648 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,937 psi | 51% | 2448 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 38,856 psi | 64% | 2641 fps | 95.1% |
| Norma MRP | <<locked>> | 84% | 35,462 psi | 58% | 2654 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,639 psi | 65% | 2667 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 42,641 psi | 70% | 2799 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,508 psi | 63% | 2657 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 92% | 37,840 psi | 62% | 2674 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 46% | 1657 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,140 psi | 82% | 2808 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,905 psi | 77% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,813 psi | 65% | 2694 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,464 psi | 63% | 2703 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,201 psi | 58% | 2684 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 47,050 psi | 77% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,815 psi | 70% | 2697 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 37,608 psi | 62% | 2635 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,801 psi | 72% | 2687 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,743 psi | 70% | 2667 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 51,474 psi | 85% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,872 psi | 67% | 2648 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,254 psi | 79% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,051 psi | 79% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,727 psi | 69% | 2608 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,798 psi | 65% | 2687 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 47,311 psi | 78% | 2753 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,731 psi | 77% | 2743 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,303 psi | 60% | 2628 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,752 psi | 59% | 2562 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 45,078 psi | 74% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,075 psi | 67% | 2664 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,695 psi | 62% | 2602 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 40,466 psi | 66% | 2667 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,807 psi | 52% | 2520 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 43,976 psi | 72% | 2828 fps | 95% |
| Vihtavuori N565 | <<locked>> | 96% | 43,265 psi | 71% | 2805 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,132 psi | 66% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,119 psi | 69% | 2726 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,266 psi | 41% | 2428 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,103 psi | 66% | 2657 fps | 95.7% |
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 80 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Woodleigh HS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,811 fps to 3,068 fps. ADI AR 2225 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, Alliant Reloder-25 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, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Woodleigh HS 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.