Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 175gr | Atomic 29 HP bullet and 90 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 High Country and Norma MRP.
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 2495 | <<locked>> | 82% | 54,201 psi | 89% | 2812 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,344 psi | 86% | 2835 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,476 psi | 88% | 2933 fps | 99.8% |
| Accurate 4064 | <<locked>> | 84% | 54,563 psi | 90% | 2867 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 51,982 psi | 85% | 2927 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 54,940 psi | 90% | 3084 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 51,967 psi | 85% | 3018 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 52,040 psi | 85% | 2861 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,330 psi | 88% | 2976 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,592 psi | 90% | 3028 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,534 psi | 90% | 3035 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,403 psi | 88% | 2972 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,547 psi | 86% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,663 psi | 86% | 2900 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,171 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,230 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,678 psi | 86% | 2966 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,447 psi | 88% | 3025 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,473 psi | 83% | 2953 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,801 psi | 72% | 2877 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,070 psi | 89% | 3094 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,921 psi | 80% | 2943 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 53,055 psi | 87% | 2894 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,447 psi | 88% | 3025 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 52,736 psi | 87% | 2881 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 53,621 psi | 88% | 2913 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,534 psi | 90% | 2986 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 88% | 54,244 psi | 89% | 2943 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 98% | 54,853 psi | 90% | 2972 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,592 psi | 88% | 2953 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,388 psi | 88% | 2910 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,795 psi | 90% | 2946 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,815 psi | 70% | 2907 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 90% | 54,607 psi | 90% | 3022 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 60% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,766 psi | 90% | 2894 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,780 psi | 88% | 2874 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 53,722 psi | 88% | 2917 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,462 psi | 89% | 2910 fps | 99.3% |
| IMR 4831 | <<locked>> | 92% | 52,765 psi | 87% | 2923 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,041 psi | 89% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,895 psi | 87% | 2904 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,938 psi | 85% | 2995 fps | 97% |
| Lovex S062 | <<locked>> | 84% | 54,752 psi | 90% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,302 psi | 89% | 2904 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 52,344 psi | 86% | 2894 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,193 psi | 73% | 2779 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 51,967 psi | 85% | 2884 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,607 psi | 90% | 2972 fps | 98.4% |
| Norma MRP | <<locked>> | 98% | 53,011 psi | 87% | 3051 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 54,665 psi | 90% | 2972 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,649 psi | 86% | 2910 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,272 psi | 86% | 3012 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 53,505 psi | 88% | 2976 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2884 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 61% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,490 psi | 88% | 2897 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,882 psi | 88% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 51,895 psi | 85% | 2953 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,331 psi | 89% | 3041 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,714 psi | 70% | 2900 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 53,229 psi | 87% | 2841 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,185 psi | 87% | 2890 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,071 psi | 90% | 2946 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 96% | 51,953 psi | 85% | 2949 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 52,736 psi | 87% | 2881 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,302 psi | 89% | 2904 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 54,752 psi | 90% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,344 psi | 86% | 2894 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,955 psi | 90% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,476 psi | 89% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,172 psi | 89% | 2858 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,853 psi | 90% | 2999 fps | 98.7% |
| Somchem S355 | <<locked>> | 86% | 53,258 psi | 87% | 2887 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,171 psi | 87% | 2881 fps | 96.4% |
| Somchem S365 | <<locked>> | 94% | 53,795 psi | 88% | 2969 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,431 psi | 86% | 2923 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 53,722 psi | 88% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,882 psi | 88% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,636 psi | 90% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,113 psi | 87% | 2910 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,764 psi | 85% | 2897 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 52,054 psi | 85% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,272 psi | 86% | 2917 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,808 psi | 87% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,374 psi | 88% | 3038 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,663 psi | 86% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,534 psi | 90% | 2986 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,339 psi | 74% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,562 psi | 86% | 2920 fps | 98.2% |
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 2495 | <<locked>> | 80% | 50,647 psi | 83% | 2762 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,892 psi | 80% | 2779 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 32,764 psi | 54% | 2530 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,022 psi | 79% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,535 psi | 60% | 2635 fps | 98.4% |
| Accurate High Country | 72 gr | 92% | 44,324 psi | 73% | 2890 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 96% | 48,298 psi | 79% | 2949 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 45,687 psi | 75% | 2749 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,799 psi | 67% | 2736 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 47,703 psi | 78% | 2904 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,691 psi | 83% | 2972 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 40,973 psi | 67% | 2740 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,122 psi | 76% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,371 psi | 81% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,853 psi | 59% | 2651 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,683 psi | 67% | 2776 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,524 psi | 67% | 2730 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,770 psi | 67% | 2782 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,020 psi | 43% | 2395 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,560 psi | 52% | 2575 fps | 95.5% |
| Alliant Reloder-26 | 66.1 gr | 82% | 29,733 psi | 49% | 2566 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 40,016 psi | 66% | 2766 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,427 psi | 76% | 2785 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,770 psi | 67% | 2782 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,814 psi | 67% | 2657 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,804 psi | 77% | 2799 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 38,812 psi | 64% | 2690 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,858 psi | 69% | 2713 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 47,659 psi | 78% | 2848 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,096 psi | 82% | 2894 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,286 psi | 55% | 2539 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,329 psi | 84% | 2894 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,074 psi | 66% | 2841 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 37,681 psi | 62% | 2694 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 44% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,066 psi | 79% | 2785 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,488 psi | 83% | 2818 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 36,608 psi | 60% | 2582 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,395 psi | 70% | 2690 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 35,215 psi | 58% | 2592 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 50,633 psi | 83% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,543 psi | 76% | 2789 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 45,368 psi | 74% | 2871 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 48,298 psi | 79% | 2782 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,726 psi | 65% | 2638 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 38,014 psi | 62% | 2618 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 31,720 psi | 52% | 2503 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 48,689 psi | 80% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,379 psi | 68% | 2730 fps | 95.3% |
| Norma MRP | 68.9 gr | 88% | 37,202 psi | 61% | 2730 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,637 psi | 60% | 2638 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 49,110 psi | 81% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 45,179 psi | 74% | 2881 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,520 psi | 58% | 2621 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 37,217 psi | 61% | 2687 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 45% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,876 psi | 77% | 2782 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,279 psi | 71% | 2831 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,477 psi | 60% | 2657 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,462 psi | 58% | 2664 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,028 psi | 61% | 2759 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,111 psi | 82% | 2795 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,671 psi | 72% | 2733 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,208 psi | 74% | 2772 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 39,479 psi | 65% | 2710 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,814 psi | 67% | 2657 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,726 psi | 65% | 2638 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 48,298 psi | 79% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,014 psi | 62% | 2618 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,991 psi | 74% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,034 psi | 74% | 2638 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,798 psi | 64% | 2579 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,117 psi | 64% | 2707 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 43,961 psi | 72% | 2730 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,661 psi | 82% | 2825 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 32,996 psi | 54% | 2589 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 37,463 psi | 62% | 2635 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 50,241 psi | 82% | 2753 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,705 psi | 83% | 2769 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,076 psi | 69% | 2661 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,971 psi | 62% | 2635 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 39,508 psi | 65% | 2671 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,834 psi | 80% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,391 psi | 61% | 2635 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 28,543 psi | 47% | 2470 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 94% | 46,528 psi | 76% | 2910 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,246 psi | 61% | 2605 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 38,812 psi | 64% | 2690 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,424 psi | 40% | 2418 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,496 psi | 70% | 2736 fps | 95.9% |
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 90 powders for .300 Blaser Mag. loaded with the .308 | 175gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,094 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,094 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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 High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 175gr | Atomic 29 HP 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.