Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 185gr | Berger Hybrid Target bullet and 83 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% | 53,795 psi | 88% | 2858 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,984 psi | 90% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,286 psi | 86% | 2851 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,343 psi | 84% | 2946 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 96% | 52,243 psi | 86% | 2946 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 54,737 psi | 90% | 2822 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,113 psi | 87% | 2897 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,230 psi | 89% | 2949 fps | 98% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,333 psi | 61% | 2671 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,359 psi | 88% | 2897 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,272 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,997 psi | 87% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,027 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,663 psi | 86% | 2887 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,461 psi | 88% | 2946 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,215 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,920 psi | 77% | 2864 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,331 psi | 89% | 3015 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,417 psi | 86% | 2930 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 53,055 psi | 87% | 2808 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,815 psi | 70% | 2785 fps | 96.2% |
| Bofors RP5 | <<locked>> | 98% | 53,461 psi | 88% | 2946 fps | 99% |
| Bofors RP7 | <<locked>> | 86% | 52,388 psi | 86% | 2802 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,630 psi | 77% | 2808 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 53,127 psi | 87% | 2825 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,215 psi | 89% | 2904 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 53,882 psi | 88% | 2861 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 54,433 psi | 89% | 2894 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,258 psi | 87% | 2874 fps | 97.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,316 psi | 88% | 2828 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,948 psi | 75% | 2907 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 88% | 54,244 psi | 89% | 2940 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 60% | 1772 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,128 psi | 89% | 2802 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,388 psi | 88% | 2835 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,853 psi | 88% | 2825 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 52,634 psi | 86% | 2841 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,591 psi | 86% | 2825 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 98% | 51,924 psi | 85% | 2927 fps | 97.7% |
| Lovex S062 | <<locked>> | 82% | 54,346 psi | 89% | 2792 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,070 psi | 89% | 2822 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,243 psi | 86% | 2818 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,022 psi | 79% | 2769 fps | 99.6% |
| Norma 203B | <<locked>> | 82% | 55,071 psi | 90% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,172 psi | 89% | 2887 fps | 98.7% |
| Norma MRP | <<locked>> | 96% | 53,243 psi | 87% | 2976 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 54,360 psi | 89% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,199 psi | 86% | 2940 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 53,345 psi | 88% | 2894 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,227 psi | 82% | 2877 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 61% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,142 psi | 87% | 2815 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,664 psi | 88% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,011 psi | 85% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,896 psi | 88% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,050 psi | 76% | 2907 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 53,142 psi | 87% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,766 psi | 90% | 2867 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 94% | 51,808 psi | 85% | 2871 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 52,388 psi | 86% | 2802 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,070 psi | 89% | 2822 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,346 psi | 89% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,243 psi | 86% | 2818 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,476 psi | 89% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,925 psi | 89% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,621 psi | 88% | 2776 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,882 psi | 90% | 2923 fps | 99.1% |
| Somchem S355 | <<locked>> | 84% | 53,040 psi | 87% | 2802 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,692 psi | 87% | 2805 fps | 97% |
| Somchem S365 | <<locked>> | 92% | 54,114 psi | 89% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,431 psi | 86% | 2848 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 54,302 psi | 89% | 2776 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,026 psi | 87% | 2828 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 51,677 psi | 85% | 2822 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 54,998 psi | 90% | 2772 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 52,127 psi | 86% | 2835 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,127 psi | 87% | 2900 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,403 psi | 88% | 2963 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,052 psi | 81% | 2874 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,359 psi | 86% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,462 psi | 89% | 2907 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,009 psi | 82% | 3002 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,359 psi | 86% | 2841 fps | 98.6% |
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 3100 | <<locked>> | 82% | 31,357 psi | 51% | 2425 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,576 psi | 85% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,711 psi | 65% | 2631 fps | 99.4% |
| Accurate High Country | 68.5 gr | 88% | 41,582 psi | 68% | 2759 fps | 95.3% |
| Accurate MAGPRO | 74.6 gr | 94% | 48,631 psi | 80% | 2884 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 48,428 psi | 80% | 2723 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,392 psi | 63% | 2612 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 44,425 psi | 73% | 2769 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 35,085 psi | 58% | 2612 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,493 psi | 63% | 2612 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,008 psi | 80% | 2743 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,363 psi | 63% | 2638 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,729 psi | 72% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,116 psi | 63% | 2605 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,392 psi | 63% | 2657 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,311 psi | 46% | 2402 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,052 psi | 49% | 2464 fps | 95.6% |
| Alliant Reloder-26 | 64.2 gr | 80% | 30,313 psi | 50% | 2516 fps | 96.7% |
| Bofors RP15 | <<locked>> | 90% | 37,884 psi | 62% | 2644 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 49,705 psi | 82% | 2759 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,074 psi | 66% | 2726 fps | 95.2% |
| Bofors RP5 | <<locked>> | 88% | 38,392 psi | 63% | 2657 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 43,410 psi | 71% | 2638 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 40,640 psi | 67% | 2680 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 49,835 psi | 82% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,640 psi | 68% | 2677 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 80% | 44,498 psi | 73% | 2694 fps | 97.4% |
| Hodgdon H4831 | <<locked>> | 90% | 44,396 psi | 73% | 2717 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,615 psi | 77% | 2759 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,114 psi | 59% | 2530 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,855 psi | 62% | 2717 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 40,509 psi | 67% | 2690 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 45% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,937 psi | 84% | 2753 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,059 psi | 64% | 2569 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,817 psi | 74% | 2667 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,072 psi | 63% | 2582 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,398 psi | 76% | 2717 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 42,569 psi | 70% | 2746 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 51,198 psi | 84% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,351 psi | 70% | 2618 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 40,683 psi | 67% | 2605 fps | 97.8% |
| Lovex S071 | <<locked>> | 86% | 30,647 psi | 50% | 2405 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 51,648 psi | 85% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,580 psi | 63% | 2595 fps | 95.1% |
| Norma MRP | <<locked>> | 84% | 35,027 psi | 57% | 2608 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 39,421 psi | 65% | 2625 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 42,076 psi | 69% | 2746 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 38,218 psi | 63% | 2612 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 92% | 37,536 psi | 62% | 2628 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 46% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,690 psi | 82% | 2756 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,441 psi | 76% | 2805 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,566 psi | 65% | 2648 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,130 psi | 63% | 2657 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,824 psi | 57% | 2638 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 46,789 psi | 77% | 2707 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,467 psi | 70% | 2648 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 84% | 37,202 psi | 61% | 2589 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,410 psi | 71% | 2638 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,351 psi | 70% | 2618 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 51,198 psi | 84% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,683 psi | 67% | 2605 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,979 psi | 79% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,732 psi | 78% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,394 psi | 68% | 2562 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,854 psi | 61% | 2582 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 46,847 psi | 77% | 2703 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,311 psi | 76% | 2694 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 35,926 psi | 59% | 2582 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,505 psi | 58% | 2520 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 44,875 psi | 74% | 2631 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,756 psi | 67% | 2618 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,304 psi | 61% | 2556 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,677 psi | 85% | 2726 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,176 psi | 66% | 2621 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,415 psi | 52% | 2474 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 43,497 psi | 71% | 2779 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 42,757 psi | 70% | 2756 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,668 psi | 65% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,640 psi | 68% | 2677 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,092 psi | 41% | 2388 fps | 97.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,697 psi | 65% | 2612 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 83 powders for .300 Blaser Mag. loaded with the .308 | 185gr | Berger Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,015 fps. ADI AR 2225 gives the best case fill at 100 %, and 83 of the 83 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 185.0 gr projectile in 0.308" calls for a 1:11.0 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. Alliant Reloder-26, Accurate MAGPRO, Accurate High Country rank at the top here: for .300 Blaser Mag. with the .308 | 185gr | Berger Hybrid Target 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.