Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Speer Magnum Tip Soft Point bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 52,170 psi | 86% | 2881 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 53,882 psi | 88% | 2923 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 53,272 psi | 87% | 3025 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 54,128 psi | 89% | 3025 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 52,591 psi | 86% | 2838 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,708 psi | 90% | 2972 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 52,402 psi | 86% | 2969 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,798 psi | 64% | 2749 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,882 psi | 90% | 2969 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,693 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,824 psi | 90% | 2982 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,141 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,201 psi | 89% | 2963 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 51,938 psi | 85% | 2969 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,779 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,718 psi | 80% | 2943 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,823 psi | 87% | 3038 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,462 psi | 89% | 3009 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 54,462 psi | 89% | 2881 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,556 psi | 73% | 2864 fps | 96.6% |
| Bofors RP5 | <<locked>> | 96% | 51,938 psi | 85% | 2969 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 53,708 psi | 88% | 2871 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,167 psi | 79% | 2887 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 54,636 psi | 90% | 2897 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,286 psi | 86% | 2920 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 51,895 psi | 85% | 2877 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 52,518 psi | 86% | 2910 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,998 psi | 90% | 2953 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,085 psi | 90% | 2904 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,790 psi | 78% | 2995 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 52,272 psi | 86% | 2953 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 60% | 1818 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,868 psi | 90% | 2907 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 51,953 psi | 85% | 2844 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 54,302 psi | 89% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,954 psi | 89% | 2900 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 53,650 psi | 88% | 3005 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 52,315 psi | 86% | 2844 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,664 psi | 88% | 2887 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,763 psi | 82% | 2841 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 52,156 psi | 86% | 2907 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 51,416 psi | 84% | 2992 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 52,721 psi | 87% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,041 psi | 89% | 3022 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 54,955 psi | 90% | 2966 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,228 psi | 86% | 2956 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 61% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,418 psi | 89% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 51,663 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,795 psi | 88% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,025 psi | 85% | 2972 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,935 psi | 79% | 2989 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 54,737 psi | 90% | 2877 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,750 psi | 87% | 2887 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 94% | 53,664 psi | 88% | 2953 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 53,708 psi | 88% | 2871 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,315 psi | 86% | 2844 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 53,664 psi | 88% | 2887 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,576 psi | 86% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 51,822 psi | 85% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,071 psi | 90% | 2848 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,214 psi | 87% | 2946 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 54,621 psi | 90% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,433 psi | 89% | 2881 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 52,344 psi | 86% | 2910 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,128 psi | 89% | 2923 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 52,359 psi | 86% | 2795 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,491 psi | 89% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,635 psi | 88% | 2900 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 53,650 psi | 88% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 51,793 psi | 85% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 51,576 psi | 85% | 2979 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2956 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,041 psi | 89% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,518 psi | 86% | 2923 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,692 psi | 87% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,128 psi | 89% | 2917 fps | 98.8% |
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>> | 80% | 30,284 psi | 50% | 2434 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 40,973 psi | 67% | 2697 fps | 99.5% |
| Accurate High Country | <<locked>> | 88% | 43,221 psi | 71% | 2838 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 92% | 47,036 psi | 77% | 2897 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,501 psi | 81% | 2789 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,392 psi | 65% | 2680 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 42,975 psi | 71% | 2785 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,127 psi | 56% | 2625 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,697 psi | 65% | 2684 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,328 psi | 83% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,552 psi | 65% | 2707 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,208 psi | 74% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,305 psi | 65% | 2677 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,159 psi | 61% | 2671 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,283 psi | 48% | 2467 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,153 psi | 48% | 2477 fps | 95% |
| Alliant Reloder-26 | 67.5 gr | 80% | 31,502 psi | 52% | 2589 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 39,262 psi | 64% | 2717 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,952 psi | 84% | 2825 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,814 psi | 69% | 2808 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 37,159 psi | 61% | 2671 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,556 psi | 73% | 2710 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 42,018 psi | 69% | 2759 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 51,155 psi | 84% | 2841 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,888 psi | 70% | 2746 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,571 psi | 75% | 2762 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 45,876 psi | 75% | 2792 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,078 psi | 74% | 2776 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,217 psi | 61% | 2595 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,869 psi | 61% | 2736 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,872 psi | 69% | 2766 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1624 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,074 psi | 66% | 2638 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,905 psi | 75% | 2736 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 39,204 psi | 64% | 2648 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,701 psi | 73% | 2733 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 43,947 psi | 72% | 2822 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 43,482 psi | 71% | 2687 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,771 psi | 69% | 2674 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,763 psi | 52% | 2474 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 39,711 psi | 65% | 2664 fps | 95.5% |
| Norma MRP | 67.1 gr | 82% | 33,852 psi | 56% | 2615 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,611 psi | 67% | 2690 fps | 99.4% |
| Ramshot Grand | <<locked>> | 92% | 43,743 psi | 72% | 2831 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 39,378 psi | 65% | 2680 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 36,216 psi | 59% | 2638 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,123 psi | 46% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,039 psi | 84% | 2828 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,993 psi | 79% | 2877 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,915 psi | 67% | 2720 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,276 psi | 64% | 2726 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,765 psi | 55% | 2648 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,138 psi | 79% | 2776 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,627 psi | 72% | 2717 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 38,479 psi | 63% | 2657 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,556 psi | 73% | 2710 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,482 psi | 71% | 2687 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 41,771 psi | 69% | 2674 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,255 psi | 81% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,689 psi | 80% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,540 psi | 70% | 2631 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,130 psi | 63% | 2654 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,153 psi | 79% | 2772 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,657 psi | 73% | 2710 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,188 psi | 61% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,579 psi | 60% | 2585 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,064 psi | 76% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,887 psi | 69% | 2684 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,129 psi | 59% | 2569 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 41,379 psi | 68% | 2690 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,561 psi | 53% | 2543 fps | 98.3% |
| Vihtavuori N560 | 73.7 gr | 90% | 45,092 psi | 74% | 2858 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 44,382 psi | 73% | 2831 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,901 psi | 67% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,062 psi | 71% | 2753 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,904 psi | 43% | 2457 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,290 psi | 63% | 2625 fps | 95.3% |
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 77 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Speer Magnum Tip Soft Point. Winchester StaBALL HD delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,081 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Speer Magnum Tip Soft Point 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.