Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 175gr | Hornady AEROMATCH bullet and 86 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 Vihtavuori N560.
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% | 53,911 psi | 89% | 2861 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 52,301 psi | 86% | 2913 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 53,606 psi | 88% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,230 psi | 89% | 2959 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,272 psi | 87% | 3058 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 98% | 54,317 psi | 89% | 3058 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 53,490 psi | 88% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 51,764 psi | 85% | 2949 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 98% | 52,866 psi | 87% | 2999 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,721 psi | 85% | 2943 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,721 psi | 85% | 2943 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,244 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,360 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,955 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,562 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,665 psi | 90% | 2995 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 51,982 psi | 85% | 2999 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,446 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,658 psi | 75% | 2913 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,460 psi | 86% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,981 psi | 84% | 2979 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 55,013 psi | 90% | 2920 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 51,982 psi | 85% | 2999 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 54,549 psi | 90% | 2910 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,194 psi | 74% | 2844 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 82% | 51,924 psi | 85% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,692 psi | 87% | 2956 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 86% | 52,576 psi | 86% | 2917 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 52,910 psi | 87% | 2940 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,967 psi | 85% | 2927 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,779 psi | 85% | 2887 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,657 psi | 73% | 2949 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 52,591 psi | 86% | 2989 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 60% | 1827 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,895 psi | 87% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,054 psi | 85% | 2887 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,721 psi | 87% | 2884 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 54,737 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,679 psi | 90% | 2933 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,838 psi | 88% | 3031 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 53,069 psi | 87% | 2854 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,837 psi | 87% | 2881 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,244 psi | 89% | 2923 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,528 psi | 76% | 2818 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 53,664 psi | 88% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,547 psi | 86% | 2936 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 51,372 psi | 84% | 3022 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 53,069 psi | 87% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,476 psi | 89% | 2940 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,273 psi | 89% | 3048 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 51,692 psi | 85% | 2943 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,544 psi | 80% | 2920 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,275 psi | 61% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 51,735 psi | 85% | 2867 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,040 psi | 85% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,157 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,591 psi | 86% | 3012 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,715 psi | 73% | 2946 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 55,056 psi | 90% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 51,895 psi | 85% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,258 psi | 87% | 2920 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 53,766 psi | 88% | 2979 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 54,549 psi | 90% | 2910 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,837 psi | 87% | 2881 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,069 psi | 87% | 2854 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,244 psi | 89% | 2923 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,113 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,736 psi | 87% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,301 psi | 86% | 2828 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,301 psi | 88% | 2976 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 51,909 psi | 85% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,998 psi | 90% | 2910 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 52,286 psi | 86% | 2946 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,563 psi | 90% | 2959 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 53,055 psi | 87% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,998 psi | 90% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,780 psi | 88% | 2930 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 53,838 psi | 88% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,157 psi | 89% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,998 psi | 90% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,706 psi | 85% | 3009 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 2920 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,549 psi | 90% | 2904 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,939 psi | 87% | 2959 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,892 psi | 79% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,592 psi | 90% | 2949 fps | 98.5% |
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% | 50,633 psi | 83% | 2808 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 32,532 psi | 53% | 2520 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 50,299 psi | 83% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,508 psi | 63% | 2674 fps | 98.9% |
| Accurate High Country | <<locked>> | 90% | 43,236 psi | 71% | 2867 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 96% | 50,618 psi | 83% | 2992 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 47,181 psi | 77% | 2779 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,755 psi | 65% | 2710 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 46,166 psi | 76% | 2874 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,987 psi | 66% | 2717 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,987 psi | 66% | 2717 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,819 psi | 79% | 2802 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,039 psi | 84% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,318 psi | 61% | 2684 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,525 psi | 70% | 2812 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,566 psi | 65% | 2707 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,885 psi | 65% | 2759 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,499 psi | 45% | 2438 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,125 psi | 51% | 2559 fps | 95.4% |
| Alliant Reloder-26 | 65.3 gr | 80% | 29,370 psi | 48% | 2549 fps | 95.5% |
| Bofors RP15 | <<locked>> | 92% | 39,349 psi | 65% | 2746 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 48,341 psi | 79% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,885 psi | 65% | 2759 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 42,409 psi | 70% | 2687 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 42,308 psi | 69% | 2782 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 48,530 psi | 80% | 2828 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,393 psi | 66% | 2723 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 43,323 psi | 71% | 2743 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 94% | 49,530 psi | 81% | 2881 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,443 psi | 80% | 2861 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,896 psi | 57% | 2575 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,305 psi | 65% | 2822 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 39,334 psi | 65% | 2733 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 45% | 1634 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,617 psi | 81% | 2808 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,043 psi | 62% | 2615 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,816 psi | 72% | 2720 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 36,956 psi | 61% | 2628 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,066 psi | 79% | 2818 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 44,222 psi | 73% | 2848 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 50,053 psi | 82% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,365 psi | 68% | 2671 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 39,653 psi | 65% | 2651 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 31,691 psi | 52% | 2497 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 50,430 psi | 83% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,190 psi | 66% | 2700 fps | 95.1% |
| Norma MRP | 68.1 gr | 86% | 36,361 psi | 60% | 2710 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 38,305 psi | 63% | 2671 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 50,952 psi | 84% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,859 psi | 72% | 2851 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 37,057 psi | 61% | 2654 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 39,044 psi | 64% | 2730 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 46% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,617 psi | 80% | 2812 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,150 psi | 74% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,203 psi | 63% | 2694 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,086 psi | 61% | 2703 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,245 psi | 60% | 2736 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 51,677 psi | 85% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,600 psi | 75% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,961 psi | 72% | 2749 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 38,653 psi | 63% | 2690 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 42,409 psi | 70% | 2687 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,365 psi | 68% | 2671 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 50,053 psi | 82% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,653 psi | 65% | 2651 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,630 psi | 77% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,572 psi | 76% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,524 psi | 67% | 2612 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,915 psi | 67% | 2743 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 45,716 psi | 75% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,211 psi | 79% | 2799 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 34,737 psi | 57% | 2628 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,724 psi | 60% | 2615 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 43,743 psi | 72% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,610 psi | 65% | 2667 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 38,609 psi | 63% | 2651 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,430 psi | 83% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,015 psi | 64% | 2667 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 30,356 psi | 50% | 2513 fps | 97.1% |
| Vihtavuori N560 | 74.4 gr | 94% | 48,254 psi | 79% | 2946 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 44,251 psi | 73% | 2858 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,653 psi | 63% | 2635 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,567 psi | 67% | 2726 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,294 psi | 40% | 2408 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,350 psi | 68% | 2713 fps | 95.6% |
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 86 powders for .300 Blaser Mag. loaded with the .308 | 175gr | Hornady AEROMATCH. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,068 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 86 of the 86 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 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Blaser Mag. with the .308 | 175gr | Hornady AEROMATCH 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.