Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 170gr | Lapua Naturalis bullet and 92 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 Accurate High Country.
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% | 53,055 psi | 87% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,013 psi | 90% | 2913 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,040 psi | 85% | 2949 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 53,403 psi | 88% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,331 psi | 89% | 3005 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 53,403 psi | 88% | 3097 fps | 97.4% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,621 psi | 90% | 3100 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 54,215 psi | 89% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,127 psi | 86% | 2992 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,577 psi | 88% | 3045 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,258 psi | 87% | 3054 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 52,170 psi | 86% | 2989 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,911 psi | 90% | 2956 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,056 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 51,924 psi | 85% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,084 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,940 psi | 90% | 3038 fps | 98.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,228 psi | 86% | 3041 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,110 psi | 81% | 2969 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,656 psi | 70% | 2887 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,707 psi | 87% | 3114 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,674 psi | 78% | 2956 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 51,953 psi | 85% | 2917 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,228 psi | 86% | 3041 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 51,735 psi | 85% | 2900 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 52,518 psi | 86% | 2933 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,272 psi | 87% | 3005 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 53,113 psi | 87% | 2963 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 53,534 psi | 88% | 2986 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,344 psi | 86% | 2966 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,083 psi | 86% | 2933 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,867 psi | 88% | 2976 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,447 psi | 88% | 3041 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 59% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,607 psi | 90% | 2936 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,737 psi | 88% | 2917 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,837 psi | 87% | 2897 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 52,837 psi | 87% | 2940 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,432 psi | 88% | 2930 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 55,042 psi | 90% | 2999 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 52,953 psi | 87% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,764 psi | 85% | 2920 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,894 psi | 84% | 3012 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 53,693 psi | 88% | 2907 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,447 psi | 88% | 2930 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,636 psi | 90% | 2969 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,192 psi | 71% | 2795 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 54,998 psi | 90% | 2917 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,302 psi | 89% | 2963 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,345 psi | 88% | 2989 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 51,576 psi | 85% | 3064 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 53,417 psi | 88% | 2992 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,488 psi | 85% | 2933 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,126 psi | 84% | 3028 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 52,257 psi | 86% | 2992 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,339 psi | 74% | 2894 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,782 psi | 60% | 1890 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,649 psi | 86% | 2920 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,547 psi | 86% | 3028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,331 psi | 89% | 3028 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,026 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,756 psi | 69% | 2907 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 52,243 psi | 86% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,025 psi | 85% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,911 psi | 89% | 2963 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 54,201 psi | 89% | 3025 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 51,735 psi | 85% | 2900 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,447 psi | 88% | 2930 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,693 psi | 88% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,636 psi | 90% | 2969 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,766 psi | 88% | 2976 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,868 psi | 90% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,490 psi | 88% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,113 psi | 87% | 2877 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,751 psi | 88% | 3018 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 52,199 psi | 86% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 51,996 psi | 85% | 2897 fps | 95.8% |
| Somchem S365 | <<locked>> | 94% | 52,591 psi | 86% | 2995 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,665 psi | 90% | 2995 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 52,663 psi | 86% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,866 psi | 87% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,505 psi | 88% | 2884 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 51,953 psi | 85% | 2933 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,459 psi | 83% | 2913 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,592 psi | 90% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,534 psi | 90% | 2992 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,013 psi | 90% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,011 psi | 85% | 3051 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 51,677 psi | 85% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,505 psi | 88% | 3009 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,295 psi | 73% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,271 psi | 84% | 2933 fps | 97.6% |
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% | 49,574 psi | 81% | 2789 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,964 psi | 79% | 2795 fps | 97.7% |
| Accurate 3100 | <<locked>> | 88% | 34,171 psi | 56% | 2598 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,978 psi | 77% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,592 psi | 58% | 2648 fps | 97.9% |
| Accurate High Country | 73.7 gr | 94% | 46,340 psi | 76% | 2966 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 98% | 50,734 psi | 83% | 3031 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 45,049 psi | 74% | 2776 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,844 psi | 70% | 2815 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 46,586 psi | 76% | 2913 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,545 psi | 81% | 2995 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,772 psi | 70% | 2812 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,179 psi | 74% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,385 psi | 79% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,056 psi | 58% | 2664 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,885 psi | 65% | 2799 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,279 psi | 69% | 2805 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,496 psi | 70% | 2854 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,396 psi | 42% | 2402 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,025 psi | 54% | 2648 fps | 95.8% |
| Alliant Reloder-26 | 67.9 gr | 84% | 31,270 psi | 51% | 2644 fps | 96% |
| Bofors RP15 | <<locked>> | 96% | 41,872 psi | 69% | 2841 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 45,411 psi | 75% | 2808 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,496 psi | 70% | 2854 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 40,016 psi | 66% | 2674 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 45,832 psi | 75% | 2818 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 37,898 psi | 62% | 2703 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,988 psi | 67% | 2730 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 50,024 psi | 82% | 2927 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,921 psi | 80% | 2907 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,619 psi | 54% | 2559 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,241 psi | 82% | 2917 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 36,782 psi | 60% | 2707 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 44% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,227 psi | 84% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,369 psi | 78% | 2812 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,588 psi | 81% | 2838 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 38,261 psi | 63% | 2654 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,597 psi | 68% | 2710 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 34,360 psi | 56% | 2602 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 49,617 psi | 81% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,791 psi | 80% | 2864 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 47,572 psi | 78% | 2949 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 47,384 psi | 78% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,914 psi | 64% | 2654 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 37,202 psi | 61% | 2635 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 33,083 psi | 54% | 2572 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,547 psi | 85% | 2867 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,703 psi | 78% | 2854 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,265 psi | 71% | 2802 fps | 95.6% |
| Norma MRP | <<locked>> | 88% | 36,260 psi | 60% | 2740 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,781 psi | 59% | 2651 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,051 psi | 79% | 2877 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,456 psi | 78% | 2959 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,693 psi | 57% | 2635 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 39,001 psi | 64% | 2759 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 45% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,948 psi | 75% | 2802 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,438 psi | 70% | 2854 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,505 psi | 58% | 2671 fps | 97.6% |
| ReloadSwiss RS 70 | 64 gr | 80% | 34,650 psi | 57% | 2674 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,711 psi | 64% | 2831 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 49,182 psi | 81% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,699 psi | 70% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,456 psi | 78% | 2851 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 41,249 psi | 68% | 2785 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,016 psi | 66% | 2674 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,914 psi | 64% | 2654 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 47,384 psi | 78% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,202 psi | 61% | 2635 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,048 psi | 72% | 2808 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,517 psi | 85% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,208 psi | 73% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,029 psi | 62% | 2595 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,872 psi | 67% | 2779 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 43,076 psi | 71% | 2753 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 48,573 psi | 80% | 2838 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,140 psi | 53% | 2602 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 39,088 psi | 64% | 2707 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 49,240 psi | 81% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,734 psi | 82% | 2795 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,220 psi | 68% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,086 psi | 61% | 2648 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 38,537 psi | 63% | 2684 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 47,892 psi | 79% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,521 psi | 60% | 2651 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,731 psi | 46% | 2477 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 48,660 psi | 80% | 2989 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,419 psi | 60% | 2621 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 37,898 psi | 62% | 2703 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,541 psi | 42% | 2490 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,452 psi | 68% | 2749 fps | 95.2% |
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 92 powders for .300 Blaser Mag. loaded with the .308 | 170gr | Lapua Naturalis. Alliant Reloder-26 delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,114 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 170.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 170gr | Lapua Naturalis 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.