Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Sellier & Bellot FMJ-BT bullet and 81 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 MAGPRO 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 3100 | <<locked>> | 98% | 54,143 psi | 89% | 2907 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,085 psi | 90% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,301 psi | 86% | 2894 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,517 psi | 85% | 2989 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 52,257 psi | 86% | 2989 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 54,810 psi | 90% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,171 psi | 87% | 2940 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 54,534 psi | 90% | 2995 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,521 psi | 62% | 2710 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,330 psi | 86% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,026 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,259 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,736 psi | 87% | 2930 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,867 psi | 88% | 2995 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,375 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,253 psi | 78% | 2913 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,563 psi | 90% | 3061 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,576 psi | 86% | 2972 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 53,069 psi | 87% | 2854 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,105 psi | 71% | 2828 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 53,867 psi | 88% | 2995 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 52,533 psi | 86% | 2844 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,673 psi | 77% | 2844 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 53,301 psi | 88% | 2871 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,433 psi | 89% | 2949 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 53,954 psi | 89% | 2907 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 54,578 psi | 90% | 2936 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,432 psi | 88% | 2920 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,548 psi | 88% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,209 psi | 76% | 2956 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 88% | 54,433 psi | 89% | 2982 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 60% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,186 psi | 89% | 2848 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,621 psi | 88% | 2881 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,998 psi | 89% | 2871 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 52,866 psi | 87% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,649 psi | 86% | 2867 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 52,098 psi | 86% | 2969 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 54,462 psi | 89% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,375 psi | 89% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,344 psi | 86% | 2861 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,051 psi | 79% | 2808 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 55,085 psi | 90% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,244 psi | 89% | 2933 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 53,316 psi | 88% | 3018 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,621 psi | 90% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,446 psi | 86% | 2986 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 53,417 psi | 88% | 2936 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,357 psi | 83% | 2920 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 61% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,040 psi | 87% | 2854 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,693 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,127 psi | 86% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,157 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,311 psi | 76% | 2949 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 53,359 psi | 88% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,897 psi | 90% | 2913 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 52,098 psi | 86% | 2920 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 52,533 psi | 86% | 2844 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,375 psi | 89% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,462 psi | 89% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,344 psi | 86% | 2861 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,839 psi | 90% | 2913 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,012 psi | 89% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,795 psi | 88% | 2822 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 51,648 psi | 85% | 2913 fps | 98.6% |
| Somchem S355 | <<locked>> | 84% | 53,301 psi | 88% | 2848 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,040 psi | 87% | 2848 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 54,244 psi | 89% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,663 psi | 86% | 2894 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 54,433 psi | 89% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,026 psi | 87% | 2871 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,040 psi | 85% | 2867 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 52,315 psi | 86% | 2881 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,461 psi | 88% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,490 psi | 88% | 3009 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,269 psi | 81% | 2920 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,402 psi | 86% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,433 psi | 89% | 2949 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,256 psi | 83% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,475 psi | 86% | 2884 fps | 98.5% |
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>> | 82% | 31,386 psi | 52% | 2457 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,735 psi | 85% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,798 psi | 65% | 2671 fps | 99.3% |
| Accurate High Country | 70.1 gr | 88% | 41,698 psi | 68% | 2799 fps | 95.1% |
| Accurate MAGPRO | 76.3 gr | 94% | 48,733 psi | 80% | 2923 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 48,385 psi | 79% | 2762 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,886 psi | 67% | 2707 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 44,498 psi | 73% | 2808 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 35,288 psi | 58% | 2651 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,139 psi | 81% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,479 psi | 63% | 2677 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,903 psi | 72% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,232 psi | 63% | 2648 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,377 psi | 63% | 2694 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,398 psi | 47% | 2438 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,139 psi | 49% | 2503 fps | 95.4% |
| Alliant Reloder-26 | 65.7 gr | 80% | 30,414 psi | 50% | 2552 fps | 96.5% |
| Bofors RP15 | <<locked>> | 90% | 38,058 psi | 62% | 2687 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,748 psi | 82% | 2802 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,393 psi | 66% | 2772 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 38,377 psi | 63% | 2694 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 43,526 psi | 71% | 2680 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 40,756 psi | 67% | 2723 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,835 psi | 82% | 2815 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,655 psi | 68% | 2717 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,527 psi | 73% | 2736 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,703 psi | 78% | 2818 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,673 psi | 77% | 2799 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,100 psi | 59% | 2566 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,058 psi | 62% | 2762 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 40,495 psi | 66% | 2726 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1614 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,908 psi | 84% | 2795 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,146 psi | 64% | 2608 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,889 psi | 74% | 2710 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 38,130 psi | 63% | 2618 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,557 psi | 76% | 2759 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 42,641 psi | 70% | 2785 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 51,155 psi | 84% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,467 psi | 70% | 2661 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,596 psi | 67% | 2641 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 30,705 psi | 50% | 2441 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 51,750 psi | 85% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,379 psi | 68% | 2697 fps | 95.9% |
| Norma MRP | <<locked>> | 84% | 35,070 psi | 58% | 2644 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 39,349 psi | 65% | 2661 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 42,279 psi | 69% | 2789 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 38,232 psi | 63% | 2651 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 92% | 37,681 psi | 62% | 2667 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,963 psi | 46% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,864 psi | 82% | 2802 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,601 psi | 77% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,552 psi | 65% | 2687 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,247 psi | 63% | 2700 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,896 psi | 57% | 2674 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 46,731 psi | 77% | 2746 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,554 psi | 70% | 2690 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 37,333 psi | 61% | 2628 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 43,526 psi | 71% | 2680 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,467 psi | 70% | 2661 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 51,155 psi | 84% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,596 psi | 67% | 2641 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,964 psi | 79% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,747 psi | 78% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,466 psi | 68% | 2602 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,537 psi | 65% | 2680 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 46,992 psi | 77% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,354 psi | 76% | 2733 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,984 psi | 59% | 2621 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,520 psi | 58% | 2556 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 44,773 psi | 74% | 2671 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,799 psi | 67% | 2657 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,318 psi | 61% | 2592 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 40,205 psi | 66% | 2661 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,517 psi | 52% | 2513 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 92% | 46,630 psi | 77% | 2884 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 42,844 psi | 70% | 2795 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,943 psi | 66% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,829 psi | 69% | 2720 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,106 psi | 41% | 2418 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,682 psi | 65% | 2648 fps | 95.5% |
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 86 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Sellier & Bellot FMJ-BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,061 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,061 fps. ADI AR 2217 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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 MAGPRO, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Sellier & Bellot FMJ-BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.