Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 185gr | Berger Juggernaut Target bullet and 78 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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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% | 54,940 psi | 90% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,214 psi | 87% | 2867 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 52,562 psi | 86% | 2972 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 53,374 psi | 88% | 2969 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 52,040 psi | 85% | 2785 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,056 psi | 89% | 2920 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 51,764 psi | 85% | 2917 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,247 psi | 63% | 2700 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,317 psi | 89% | 2917 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,185 psi | 87% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,085 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,430 psi | 84% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,606 psi | 88% | 2910 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,636 psi | 90% | 2969 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 51,924 psi | 85% | 2897 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,921 psi | 79% | 2887 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,677 psi | 85% | 2979 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,563 psi | 88% | 2953 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 54,012 psi | 89% | 2828 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,845 psi | 72% | 2812 fps | 96.6% |
| Bofors RP5 | <<locked>> | 98% | 54,636 psi | 90% | 2969 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 53,171 psi | 87% | 2818 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,543 psi | 78% | 2831 fps | 97.5% |
| Hodgdon H380 | <<locked>> | 82% | 54,012 psi | 89% | 2844 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 51,648 psi | 85% | 2867 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 54,665 psi | 90% | 2881 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 94% | 51,779 psi | 85% | 2854 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,317 psi | 89% | 2897 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,389 psi | 89% | 2848 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,094 psi | 77% | 2940 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 86% | 51,474 psi | 85% | 2900 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 60% | 1781 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,824 psi | 90% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,360 psi | 89% | 2858 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,621 psi | 90% | 2841 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 53,722 psi | 88% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,432 psi | 88% | 2848 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 53,011 psi | 87% | 2949 fps | 98% |
| Lovex S065 | <<locked>> | 88% | 55,071 psi | 90% | 2844 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,040 psi | 87% | 2835 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,979 psi | 80% | 2789 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 55,114 psi | 90% | 2910 fps | 98.9% |
| Norma MRP | <<locked>> | 96% | 54,447 psi | 89% | 2995 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 51,982 psi | 85% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,316 psi | 88% | 2966 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 54,302 psi | 89% | 2913 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,430 psi | 84% | 2904 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,463 psi | 62% | 1824 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,940 psi | 89% | 2831 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,607 psi | 90% | 2933 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,040 psi | 87% | 2890 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,430 psi | 84% | 2920 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,108 psi | 77% | 2933 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 84% | 54,099 psi | 89% | 2825 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,243 psi | 86% | 2835 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 52,765 psi | 87% | 2894 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 53,171 psi | 87% | 2818 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,071 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,040 psi | 87% | 2835 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,011 psi | 85% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,607 psi | 90% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,563 psi | 90% | 2795 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,315 psi | 86% | 2887 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 53,969 psi | 89% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,621 psi | 88% | 2825 fps | 97.3% |
| Somchem S365 | <<locked>> | 90% | 51,692 psi | 85% | 2858 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,577 psi | 88% | 2871 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 51,764 psi | 85% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,824 psi | 88% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,765 psi | 87% | 2844 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 53,098 psi | 87% | 2854 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,491 psi | 89% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,578 psi | 90% | 2989 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,125 psi | 82% | 2900 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,272 psi | 87% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 51,880 psi | 85% | 2871 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,532 psi | 85% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,476 psi | 88% | 2864 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% | 29,994 psi | 49% | 2392 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 40,640 psi | 67% | 2651 fps | 99.6% |
| Accurate High Country | 69.7 gr | 88% | 42,554 psi | 70% | 2782 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 92% | 46,383 psi | 76% | 2844 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,095 psi | 81% | 2740 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,885 psi | 64% | 2631 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 42,380 psi | 70% | 2733 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 33,663 psi | 55% | 2579 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,204 psi | 64% | 2635 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,937 psi | 82% | 2762 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,189 psi | 64% | 2661 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,614 psi | 73% | 2779 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,812 psi | 64% | 2628 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,622 psi | 60% | 2621 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,834 psi | 47% | 2421 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,776 psi | 47% | 2431 fps | 95% |
| Alliant Reloder-26 | 65.3 gr | 80% | 30,966 psi | 51% | 2539 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 38,711 psi | 64% | 2667 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,444 psi | 83% | 2776 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,060 psi | 67% | 2753 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 36,622 psi | 60% | 2621 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,048 psi | 72% | 2657 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 41,495 psi | 68% | 2707 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 50,691 psi | 83% | 2792 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,279 psi | 69% | 2694 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,107 psi | 74% | 2713 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 45,237 psi | 74% | 2740 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,469 psi | 73% | 2723 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,796 psi | 60% | 2549 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,230 psi | 59% | 2680 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,350 psi | 68% | 2713 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 45% | 1594 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,663 psi | 85% | 2769 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,610 psi | 65% | 2585 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,411 psi | 75% | 2684 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 38,885 psi | 64% | 2602 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,353 psi | 73% | 2684 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 43,381 psi | 71% | 2769 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 42,975 psi | 71% | 2635 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,307 psi | 68% | 2621 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,386 psi | 52% | 2428 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 39,189 psi | 64% | 2615 fps | 95.5% |
| Norma MRP | 65 gr | 82% | 33,460 psi | 55% | 2572 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,103 psi | 66% | 2641 fps | 99.4% |
| Ramshot Grand | <<locked>> | 92% | 43,091 psi | 71% | 2772 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 38,856 psi | 64% | 2631 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 35,636 psi | 59% | 2589 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 46% | 1634 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,502 psi | 83% | 2776 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,369 psi | 78% | 2825 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,393 psi | 66% | 2671 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,812 psi | 64% | 2677 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,257 psi | 55% | 2598 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 47,543 psi | 78% | 2723 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,178 psi | 71% | 2667 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 84% | 37,927 psi | 62% | 2608 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,048 psi | 72% | 2657 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,975 psi | 71% | 2635 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 80% | 41,307 psi | 68% | 2621 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,646 psi | 80% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,428 psi | 80% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,119 psi | 69% | 2582 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,579 psi | 62% | 2605 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,572 psi | 78% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,092 psi | 72% | 2657 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,637 psi | 60% | 2598 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,230 psi | 59% | 2543 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 45,527 psi | 75% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,568 psi | 68% | 2638 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 35,578 psi | 58% | 2520 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 40,930 psi | 67% | 2641 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,213 psi | 53% | 2500 fps | 98.4% |
| Vihtavuori N560 | <<locked>> | 90% | 44,353 psi | 73% | 2802 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 43,801 psi | 72% | 2779 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,509 psi | 67% | 2602 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,438 psi | 70% | 2697 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,527 psi | 42% | 2411 fps | 97.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,768 psi | 62% | 2575 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 78 powders for .300 Blaser Mag. loaded with the .308 | 185gr | Berger Juggernaut Target. Winchester StaBALL HD delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,022 fps. ADI AR 2225 gives the best case fill at 100 %, and 78 of the 78 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 1:12.0 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 | 185gr | Berger Juggernaut 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.