Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 178gr | Hornady A-TIP bullet and 84 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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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 2700 | <<locked>> | 82% | 54,853 psi | 90% | 2858 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 53,461 psi | 88% | 2910 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,476 psi | 89% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 51,851 psi | 85% | 2904 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,505 psi | 89% | 3058 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 51,822 psi | 85% | 2995 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,244 psi | 89% | 2871 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,576 psi | 86% | 2946 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 53,896 psi | 88% | 3002 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,086 psi | 61% | 2710 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,794 psi | 87% | 2943 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,794 psi | 87% | 2943 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 51,967 psi | 85% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,634 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,548 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,112 psi | 86% | 2933 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,127 psi | 87% | 2995 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,925 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,644 psi | 77% | 2913 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,012 psi | 89% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,098 psi | 86% | 2979 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 52,663 psi | 86% | 2861 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,127 psi | 87% | 2995 fps | 98.7% |
| Bofors RP7 | <<locked>> | 86% | 51,982 psi | 85% | 2848 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,325 psi | 76% | 2851 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 82% | 52,765 psi | 87% | 2877 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,809 psi | 88% | 2953 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,388 psi | 88% | 2910 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 53,954 psi | 89% | 2940 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,997 psi | 87% | 2923 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,910 psi | 87% | 2881 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,614 psi | 75% | 2953 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 53,969 psi | 89% | 2992 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 60% | 1818 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,650 psi | 88% | 2854 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,069 psi | 87% | 2887 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,476 psi | 88% | 2877 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 52,214 psi | 86% | 2894 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,112 psi | 86% | 2874 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,955 psi | 90% | 3031 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,114 psi | 89% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,809 psi | 88% | 2874 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,027 psi | 90% | 2917 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,616 psi | 78% | 2818 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,752 psi | 90% | 2904 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,606 psi | 88% | 2936 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 52,605 psi | 86% | 3022 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 53,969 psi | 89% | 2940 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,764 psi | 85% | 2986 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 52,779 psi | 87% | 2940 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,632 psi | 81% | 2920 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 61% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,692 psi | 87% | 2864 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,026 psi | 87% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 51,692 psi | 85% | 2923 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,708 psi | 88% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,701 psi | 75% | 2949 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 52,750 psi | 87% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,259 psi | 89% | 2917 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 54,911 psi | 90% | 2979 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 51,982 psi | 85% | 2848 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,809 psi | 88% | 2874 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,114 psi | 89% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,027 psi | 90% | 2917 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,215 psi | 89% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,505 psi | 88% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,287 psi | 87% | 2825 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,447 psi | 89% | 2972 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 52,721 psi | 87% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,417 psi | 86% | 2851 fps | 96.6% |
| Somchem S365 | <<locked>> | 92% | 53,548 psi | 88% | 2940 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,054 psi | 85% | 2897 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 53,882 psi | 88% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,634 psi | 86% | 2881 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,853 psi | 90% | 2927 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 82% | 54,621 psi | 90% | 2825 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 51,706 psi | 85% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,750 psi | 87% | 2949 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,794 psi | 87% | 3009 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,617 psi | 80% | 2920 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 51,996 psi | 85% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,041 psi | 89% | 2959 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,385 psi | 81% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,851 psi | 85% | 2887 fps | 98.3% |
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 2700 | <<locked>> | 80% | 51,329 psi | 84% | 2802 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 31,082 psi | 51% | 2464 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 51,155 psi | 84% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,465 psi | 65% | 2677 fps | 99.2% |
| Accurate High Country | <<locked>> | 90% | 44,309 psi | 73% | 2871 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 94% | 48,298 psi | 79% | 2930 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,080 psi | 79% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,596 psi | 67% | 2713 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 44,150 psi | 72% | 2815 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 34,867 psi | 57% | 2651 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,698 psi | 67% | 2713 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,698 psi | 67% | 2713 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,805 psi | 80% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,159 psi | 63% | 2684 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,323 psi | 71% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,277 psi | 66% | 2707 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,072 psi | 63% | 2700 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,036 psi | 46% | 2438 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,878 psi | 49% | 2503 fps | 95% |
| Alliant Reloder-26 | 65.6 gr | 80% | 29,994 psi | 49% | 2552 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 40,074 psi | 66% | 2746 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 49,211 psi | 81% | 2808 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,072 psi | 63% | 2700 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 43,091 psi | 71% | 2684 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 43,207 psi | 71% | 2785 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,501 psi | 81% | 2825 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,147 psi | 68% | 2720 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,048 psi | 72% | 2740 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 47,152 psi | 77% | 2822 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,325 psi | 76% | 2805 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,766 psi | 59% | 2572 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,579 psi | 62% | 2759 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 40,205 psi | 66% | 2733 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1624 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,589 psi | 83% | 2805 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,682 psi | 64% | 2612 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,440 psi | 73% | 2713 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 37,840 psi | 62% | 2625 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,064 psi | 76% | 2762 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 44,947 psi | 74% | 2844 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 50,865 psi | 84% | 2799 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,003 psi | 69% | 2664 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 40,335 psi | 66% | 2648 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 32,372 psi | 53% | 2497 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 51,430 psi | 84% | 2854 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,886 psi | 67% | 2697 fps | 95.6% |
| Norma MRP | 66.9 gr | 84% | 34,766 psi | 57% | 2651 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 39,044 psi | 64% | 2667 fps | 99% |
| Ramshot Grand | <<locked>> | 94% | 44,817 psi | 74% | 2854 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 37,782 psi | 62% | 2654 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 37,188 psi | 61% | 2667 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 46% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,356 psi | 81% | 2805 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,006 psi | 76% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,175 psi | 64% | 2694 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,753 psi | 62% | 2700 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,592 psi | 57% | 2674 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 46,383 psi | 76% | 2756 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,860 psi | 74% | 2749 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 39,363 psi | 65% | 2687 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 43,091 psi | 71% | 2684 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,003 psi | 69% | 2664 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 50,865 psi | 84% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,335 psi | 66% | 2648 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,427 psi | 78% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,268 psi | 78% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,176 psi | 68% | 2608 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,001 psi | 64% | 2684 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,499 psi | 76% | 2753 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,847 psi | 75% | 2736 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 35,491 psi | 58% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,215 psi | 58% | 2562 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 44,469 psi | 73% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,495 psi | 66% | 2664 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 36,999 psi | 61% | 2595 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 51,358 psi | 84% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,914 psi | 66% | 2667 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 31,183 psi | 51% | 2520 fps | 97.7% |
| Vihtavuori N560 | 73.3 gr | 92% | 46,238 psi | 76% | 2887 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 45,310 psi | 74% | 2858 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,465 psi | 65% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,350 psi | 68% | 2723 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,787 psi | 41% | 2418 fps | 96.7% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,392 psi | 65% | 2654 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 84 powders for .300 Blaser Mag. loaded with the .308 | 178gr | Hornady A-TIP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,068 fps. ADI AR 2225 gives the best case fill at 100 %, and 84 of the 84 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 178.0 gr projectile in 0.308" calls for a 1:12.0 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 178gr | Hornady A-TIP 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.