Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 172gr | Hammer HBC bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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% | 53,301 psi | 88% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,476 psi | 89% | 2871 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,576 psi | 85% | 2910 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 53,679 psi | 88% | 2864 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,070 psi | 89% | 2969 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,795 psi | 88% | 2894 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,042 psi | 90% | 3009 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,678 psi | 86% | 2995 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,663 psi | 86% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,418 psi | 89% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,752 psi | 90% | 2940 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,636 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,286 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,288 psi | 89% | 2999 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2995 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,530 psi | 80% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,409 psi | 70% | 2851 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 51,663 psi | 85% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,224 psi | 78% | 2920 fps | 96.8% |
| Bofors RP3 | <<locked>> | 84% | 51,619 psi | 85% | 2881 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,329 psi | 84% | 2995 fps | 97.8% |
| Bofors RP7 | <<locked>> | 90% | 54,694 psi | 90% | 2917 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 52,141 psi | 86% | 2894 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 52,634 psi | 86% | 2963 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 52,794 psi | 87% | 2923 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 52,808 psi | 87% | 2943 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,013 psi | 90% | 2943 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,316 psi | 88% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,576 psi | 86% | 2999 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 59% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,099 psi | 89% | 2897 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,258 psi | 87% | 2877 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,489 psi | 86% | 2854 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 52,199 psi | 86% | 2894 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,026 psi | 87% | 2890 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 54,520 psi | 90% | 2959 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 52,591 psi | 86% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,621 psi | 90% | 2933 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,270 psi | 83% | 2969 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 54,868 psi | 90% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,403 psi | 88% | 2871 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,040 psi | 87% | 2890 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,128 psi | 89% | 2930 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,888 psi | 70% | 2759 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 54,911 psi | 90% | 2884 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,041 psi | 89% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,562 psi | 86% | 2943 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,578 psi | 90% | 3084 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 52,692 psi | 87% | 2949 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,592 psi | 90% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,386 psi | 83% | 2979 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 55,071 psi | 90% | 3009 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,715 psi | 73% | 2848 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 61% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,141 psi | 86% | 2877 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 51,880 psi | 85% | 2989 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,650 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,402 psi | 86% | 3018 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,176 psi | 68% | 2861 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 52,127 psi | 86% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 51,938 psi | 85% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,388 psi | 88% | 2923 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 53,505 psi | 88% | 2982 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 54,694 psi | 90% | 2917 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,040 psi | 87% | 2890 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,403 psi | 88% | 2871 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,128 psi | 89% | 2930 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,403 psi | 88% | 2940 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,578 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,258 psi | 87% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,808 psi | 87% | 2841 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,026 psi | 87% | 2976 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 52,025 psi | 85% | 2877 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 51,721 psi | 85% | 2953 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,230 psi | 89% | 2956 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 52,315 psi | 86% | 2792 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,634 psi | 86% | 2808 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,156 psi | 87% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,042 psi | 90% | 2946 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,806 psi | 82% | 2871 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 54,215 psi | 89% | 2854 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,027 psi | 89% | 2953 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,230 psi | 89% | 3009 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,042 psi | 90% | 3071 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,534 psi | 90% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,881 psi | 87% | 2966 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,714 psi | 72% | 2986 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,694 psi | 90% | 2920 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,317 psi | 89% | 2949 fps | 98% |
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% | 49,763 psi | 82% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,776 psi | 78% | 2759 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 34,345 psi | 56% | 2575 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,123 psi | 77% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,723 psi | 59% | 2625 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 44,744 psi | 73% | 2740 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,511 psi | 70% | 2776 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 49,385 psi | 81% | 2936 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,168 psi | 81% | 2956 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,194 psi | 74% | 2766 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,196 psi | 79% | 2831 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,085 psi | 58% | 2635 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,523 psi | 65% | 2762 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,989 psi | 69% | 2766 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,018 psi | 69% | 2815 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,614 psi | 42% | 2382 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,909 psi | 54% | 2615 fps | 95.6% |
| Alliant Reloder-26 | 65.2 gr | 84% | 31,169 psi | 51% | 2612 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 41,437 psi | 68% | 2802 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 45,266 psi | 74% | 2772 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,018 psi | 69% | 2815 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,001 psi | 66% | 2641 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 45,832 psi | 75% | 2785 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 37,710 psi | 62% | 2671 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,698 psi | 67% | 2690 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 49,516 psi | 81% | 2884 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,547 psi | 53% | 2526 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,850 psi | 82% | 2881 fps | 100% |
| Hodgdon Superformance | 65.7 gr | 82% | 39,450 psi | 65% | 2740 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 45% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,894 psi | 84% | 2848 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,065 psi | 77% | 2772 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,385 psi | 81% | 2802 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 38,087 psi | 63% | 2621 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,437 psi | 68% | 2674 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 34,418 psi | 56% | 2575 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 49,414 psi | 81% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,387 psi | 84% | 2881 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 98% | 46,905 psi | 77% | 2904 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 51,634 psi | 85% | 2812 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,181 psi | 77% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,914 psi | 64% | 2621 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,246 psi | 61% | 2605 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,243 psi | 55% | 2546 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,401 psi | 84% | 2831 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,543 psi | 78% | 2818 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,076 psi | 71% | 2769 fps | 95.4% |
| Norma MRP | <<locked>> | 90% | 38,522 psi | 63% | 2769 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,708 psi | 59% | 2621 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,819 psi | 79% | 2841 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,920 psi | 77% | 2913 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 34,606 psi | 57% | 2605 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 38,798 psi | 64% | 2723 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 45% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,774 psi | 75% | 2766 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,018 psi | 69% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,505 psi | 58% | 2641 fps | 97.5% |
| ReloadSwiss RS 70 | 61.6 gr | 80% | 34,679 psi | 57% | 2644 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,493 psi | 63% | 2792 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 49,008 psi | 80% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,728 psi | 70% | 2720 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 46,876 psi | 77% | 2808 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 40,901 psi | 67% | 2746 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,001 psi | 66% | 2641 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,914 psi | 64% | 2621 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 47,181 psi | 77% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,246 psi | 61% | 2605 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,729 psi | 72% | 2772 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,126 psi | 84% | 2858 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,251 psi | 73% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,116 psi | 63% | 2566 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,509 psi | 67% | 2743 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 42,975 psi | 71% | 2717 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,169 psi | 53% | 2575 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,073 psi | 64% | 2677 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 49,269 psi | 81% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,487 psi | 81% | 2762 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,133 psi | 68% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,028 psi | 61% | 2618 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 40,901 psi | 67% | 2707 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 47,834 psi | 79% | 2756 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,622 psi | 60% | 2625 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,992 psi | 46% | 2461 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 48,066 psi | 79% | 2946 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,303 psi | 60% | 2589 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 37,884 psi | 62% | 2674 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,759 psi | 42% | 2470 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,981 psi | 84% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,150 psi | 72% | 2776 fps | 95.8% |
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 89 powders for .300 Blaser Mag. loaded with the .308 | 172gr | Hammer HBC. Norma MRP delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,818 fps to 3,084 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 172.0 gr projectile in 0.308" calls for a 1:9.5 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 Blaser Mag. with the .308 | 172gr | Hammer HBC 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.