Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Norma PlastSpitz bullet and 77 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 51,808 psi | 85% | 2874 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 53,476 psi | 88% | 2917 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 52,895 psi | 87% | 3018 fps | 98% |
| Accurate MAGPRO | <<locked>> | 96% | 53,809 psi | 88% | 3018 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 52,373 psi | 86% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,288 psi | 89% | 2966 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 52,054 psi | 85% | 2963 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,392 psi | 63% | 2736 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,243 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,346 psi | 89% | 2976 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,706 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,824 psi | 88% | 2953 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 51,547 psi | 85% | 2959 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,373 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,414 psi | 79% | 2936 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,199 psi | 86% | 3028 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,853 psi | 88% | 2995 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 54,201 psi | 89% | 2874 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,251 psi | 73% | 2858 fps | 96.5% |
| Bofors RP5 | <<locked>> | 96% | 51,547 psi | 85% | 2959 fps | 98.7% |
| Bofors RP7 | <<locked>> | 86% | 53,316 psi | 88% | 2861 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,688 psi | 78% | 2874 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,389 psi | 89% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 51,866 psi | 85% | 2910 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,940 psi | 90% | 2927 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 52,170 psi | 86% | 2904 fps | 96.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,679 psi | 90% | 2943 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,636 psi | 90% | 2894 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,311 psi | 78% | 2982 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 51,924 psi | 85% | 2949 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 60% | 1814 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,114 psi | 90% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,549 psi | 90% | 2900 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,955 psi | 90% | 2890 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 53,867 psi | 88% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,650 psi | 88% | 2890 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 53,301 psi | 88% | 2995 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 51,938 psi | 85% | 2835 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,301 psi | 88% | 2881 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,197 psi | 81% | 2831 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 51,779 psi | 85% | 2897 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 54,708 psi | 90% | 3041 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 52,272 psi | 86% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,708 psi | 88% | 3012 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 54,578 psi | 90% | 2956 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,677 psi | 85% | 2946 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,536 psi | 62% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,041 psi | 89% | 2874 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,868 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,388 psi | 88% | 2940 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,663 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 2979 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 54,288 psi | 89% | 2871 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,388 psi | 86% | 2877 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 53,258 psi | 87% | 2943 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 53,316 psi | 88% | 2861 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 51,938 psi | 85% | 2835 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 53,301 psi | 88% | 2881 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,141 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,911 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,766 psi | 90% | 2841 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,823 psi | 87% | 2940 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 54,143 psi | 89% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,896 psi | 88% | 2871 fps | 97.2% |
| Somchem S365 | <<locked>> | 90% | 51,880 psi | 85% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,795 psi | 88% | 2917 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 51,938 psi | 85% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,056 psi | 89% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,084 psi | 87% | 2890 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 53,243 psi | 87% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,723 psi | 90% | 2969 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,824 psi | 90% | 3031 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,517 psi | 83% | 2943 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,708 psi | 88% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,098 psi | 86% | 2917 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,025 psi | 85% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,766 psi | 88% | 2910 fps | 98.8% |
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 3100 | <<locked>> | 80% | 30,066 psi | 49% | 2425 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 40,698 psi | 67% | 2690 fps | 99.5% |
| Accurate High Country | 71.5 gr | 88% | 42,844 psi | 70% | 2825 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 92% | 46,702 psi | 77% | 2890 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,240 psi | 81% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,204 psi | 64% | 2674 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 42,670 psi | 70% | 2776 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 33,881 psi | 56% | 2618 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,067 psi | 82% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,320 psi | 65% | 2700 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,976 psi | 74% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,943 psi | 64% | 2667 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,421 psi | 65% | 2723 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,066 psi | 48% | 2461 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,835 psi | 51% | 2526 fps | 95.9% |
| Alliant Reloder-26 | 67 gr | 80% | 31,183 psi | 51% | 2579 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 38,899 psi | 64% | 2707 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,705 psi | 83% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,307 psi | 68% | 2795 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 39,421 psi | 65% | 2723 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,353 psi | 73% | 2700 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 41,727 psi | 69% | 2749 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 50,937 psi | 84% | 2838 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,482 psi | 70% | 2736 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,368 psi | 74% | 2756 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 45,484 psi | 75% | 2782 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,744 psi | 73% | 2769 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,956 psi | 61% | 2589 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,419 psi | 60% | 2720 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 41,553 psi | 68% | 2756 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 45% | 1624 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,822 psi | 85% | 2815 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,885 psi | 65% | 2631 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,687 psi | 75% | 2730 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 38,972 psi | 64% | 2641 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,556 psi | 73% | 2726 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 43,627 psi | 72% | 2812 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 43,265 psi | 71% | 2680 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,394 psi | 68% | 2661 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 31,430 psi | 52% | 2461 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 39,363 psi | 65% | 2654 fps | 95.3% |
| Norma MRP | 66.6 gr | 82% | 33,547 psi | 55% | 2608 fps | 95% |
| Norma URP | <<locked>> | 80% | 40,205 psi | 66% | 2680 fps | 99.4% |
| Ramshot Grand | <<locked>> | 92% | 43,236 psi | 71% | 2815 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 38,986 psi | 64% | 2671 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 35,940 psi | 59% | 2628 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 46% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,662 psi | 83% | 2818 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,747 psi | 78% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,524 psi | 67% | 2710 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,088 psi | 64% | 2720 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,781 psi | 59% | 2703 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 47,674 psi | 78% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,265 psi | 71% | 2710 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 38,116 psi | 63% | 2648 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,353 psi | 73% | 2700 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,265 psi | 71% | 2680 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 41,394 psi | 68% | 2661 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,834 psi | 80% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,457 psi | 80% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,192 psi | 69% | 2621 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,768 psi | 62% | 2644 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,921 psi | 79% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,253 psi | 78% | 2756 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 36,898 psi | 61% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,376 psi | 60% | 2582 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 45,643 psi | 75% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,669 psi | 68% | 2680 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 35,795 psi | 59% | 2559 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 41,147 psi | 68% | 2684 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,343 psi | 53% | 2536 fps | 98.2% |
| Vihtavuori N560 | <<locked>> | 90% | 44,570 psi | 73% | 2844 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 44,063 psi | 72% | 2822 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,596 psi | 67% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,641 psi | 70% | 2743 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,643 psi | 42% | 2444 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,000 psi | 62% | 2615 fps | 95.1% |
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 77 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Norma PlastSpitz. Winchester StaBALL HD delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,071 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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, Accurate High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Norma PlastSpitz 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.