Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Sellier & Bellot HPC bullet and 82 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% | 2838 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 53,432 psi | 88% | 2894 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,375 psi | 89% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 51,677 psi | 85% | 2884 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 51,576 psi | 85% | 2976 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,186 psi | 89% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,692 psi | 87% | 2930 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,853 psi | 88% | 2982 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,057 psi | 61% | 2697 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,910 psi | 87% | 2927 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 51,909 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,649 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,650 psi | 88% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,228 psi | 86% | 2920 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,113 psi | 87% | 2979 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,621 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,615 psi | 77% | 2897 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,795 psi | 88% | 3048 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,083 psi | 86% | 2963 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 52,634 psi | 86% | 2844 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,113 psi | 87% | 2979 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 51,982 psi | 85% | 2831 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,108 psi | 76% | 2831 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 52,721 psi | 87% | 2858 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,853 psi | 88% | 2936 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,388 psi | 88% | 2894 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 53,925 psi | 89% | 2923 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,953 psi | 87% | 2907 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,953 psi | 87% | 2864 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,614 psi | 75% | 2936 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 53,679 psi | 88% | 2969 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,666 psi | 60% | 1804 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,809 psi | 88% | 2838 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,084 psi | 87% | 2871 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,447 psi | 88% | 2858 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 52,301 psi | 86% | 2877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,214 psi | 86% | 2858 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,940 psi | 90% | 3015 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,012 psi | 89% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,824 psi | 88% | 2858 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 55,085 psi | 90% | 2900 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,543 psi | 78% | 2799 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 54,694 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,505 psi | 88% | 2917 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 52,562 psi | 86% | 3002 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,041 psi | 89% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,779 psi | 85% | 2972 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 52,663 psi | 86% | 2923 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,719 psi | 82% | 2907 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 61% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,721 psi | 87% | 2848 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,040 psi | 87% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 51,590 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,635 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,556 psi | 75% | 2930 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 52,736 psi | 87% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,143 psi | 89% | 2897 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,824 psi | 90% | 2959 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 51,982 psi | 85% | 2831 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,824 psi | 88% | 2858 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,012 psi | 89% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,085 psi | 90% | 2900 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,244 psi | 89% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,403 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,301 psi | 88% | 2808 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,360 psi | 89% | 2953 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 52,678 psi | 86% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,402 psi | 86% | 2838 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 53,606 psi | 88% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 51,953 psi | 85% | 2881 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 53,838 psi | 88% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,446 psi | 86% | 2861 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,882 psi | 90% | 2910 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,607 psi | 90% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,114 psi | 90% | 2920 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,620 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,823 psi | 87% | 2992 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,385 psi | 79% | 2900 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 51,909 psi | 85% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,853 psi | 88% | 2936 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,414 psi | 81% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,837 psi | 85% | 2871 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% | 51,314 psi | 84% | 2782 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 31,038 psi | 51% | 2451 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 51,256 psi | 84% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,392 psi | 65% | 2661 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 48,037 psi | 79% | 2910 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,008 psi | 79% | 2756 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,582 psi | 67% | 2697 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 44,092 psi | 72% | 2799 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 98% | 34,838 psi | 57% | 2635 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 40,683 psi | 67% | 2697 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,704 psi | 80% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,101 psi | 63% | 2667 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,308 psi | 71% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,263 psi | 66% | 2690 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,913 psi | 62% | 2684 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,108 psi | 46% | 2428 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,907 psi | 49% | 2490 fps | 95.1% |
| Alliant Reloder-26 | 65 gr | 80% | 29,994 psi | 49% | 2539 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 40,118 psi | 66% | 2730 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,124 psi | 81% | 2789 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 37,913 psi | 62% | 2684 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,149 psi | 71% | 2671 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,149 psi | 71% | 2772 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 49,443 psi | 81% | 2805 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,104 psi | 67% | 2703 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 44,005 psi | 72% | 2723 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 47,036 psi | 77% | 2802 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,195 psi | 76% | 2789 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,665 psi | 59% | 2556 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,492 psi | 62% | 2743 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 40,030 psi | 66% | 2717 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1611 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,459 psi | 83% | 2785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,595 psi | 63% | 2595 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,367 psi | 73% | 2694 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 37,753 psi | 62% | 2608 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,093 psi | 76% | 2746 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 45,063 psi | 74% | 2831 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,720 psi | 83% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,090 psi | 69% | 2651 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,263 psi | 66% | 2631 fps | 97.5% |
| Lovex S071 | <<locked>> | 86% | 30,356 psi | 50% | 2431 fps | 95% |
| Norma 203B | <<locked>> | 80% | 51,343 psi | 84% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 82% | 40,843 psi | 67% | 2684 fps | 95.6% |
| Norma MRP | 66.3 gr | 84% | 34,780 psi | 57% | 2635 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,957 psi | 64% | 2651 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 41,858 psi | 69% | 2776 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,753 psi | 62% | 2638 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 37,159 psi | 61% | 2654 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 46% | 1650 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,327 psi | 81% | 2789 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,992 psi | 76% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,175 psi | 64% | 2677 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,753 psi | 62% | 2684 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,461 psi | 57% | 2657 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 46,282 psi | 76% | 2736 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 44,860 psi | 74% | 2733 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 39,378 psi | 65% | 2671 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,149 psi | 71% | 2671 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,090 psi | 69% | 2651 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 50,720 psi | 83% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,263 psi | 66% | 2631 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,384 psi | 78% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,340 psi | 78% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,133 psi | 68% | 2592 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,015 psi | 64% | 2667 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,601 psi | 77% | 2736 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,948 psi | 75% | 2723 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,447 psi | 58% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,186 psi | 58% | 2546 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 44,411 psi | 73% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,451 psi | 66% | 2651 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 36,869 psi | 61% | 2579 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,314 psi | 84% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,871 psi | 65% | 2651 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,125 psi | 51% | 2503 fps | 97.7% |
| Vihtavuori N560 | 72.6 gr | 92% | 46,180 psi | 76% | 2871 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,310 psi | 74% | 2844 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,465 psi | 65% | 2615 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,307 psi | 68% | 2707 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,758 psi | 41% | 2402 fps | 96.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,247 psi | 64% | 2638 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 82 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Sellier & Bellot HPC. Alliant Reloder-26 delivers the highest muzzle velocity at 3,048 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,048 fps. ADI AR 2225 gives the best case fill at 100 %, and 82 of the 82 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 180.0 gr projectile in 0.308" calls for a 1:11.5 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 | 180gr | Sellier & Bellot HPC 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.