Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Winchester FailSafe bullet and 82 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% | 54,070 psi | 89% | 2904 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,027 psi | 90% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,489 psi | 86% | 2897 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 51,663 psi | 85% | 2992 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 96% | 52,402 psi | 86% | 2989 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 54,708 psi | 90% | 2864 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,330 psi | 88% | 2943 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,404 psi | 89% | 2995 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,637 psi | 62% | 2713 fps | 96.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 53,548 psi | 88% | 2943 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,460 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,185 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,404 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,852 psi | 87% | 2930 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,737 psi | 88% | 2992 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,137 psi | 77% | 2910 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,766 psi | 90% | 3064 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,692 psi | 87% | 2976 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 53,185 psi | 87% | 2854 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,047 psi | 71% | 2828 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 53,737 psi | 88% | 2992 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 52,431 psi | 86% | 2841 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,789 psi | 77% | 2848 fps | 97% |
| Hodgdon H380 | <<locked>> | 82% | 53,258 psi | 87% | 2871 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,346 psi | 89% | 2946 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 54,114 psi | 89% | 2907 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 96% | 54,723 psi | 90% | 2940 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,548 psi | 88% | 2920 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,461 psi | 88% | 2874 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,311 psi | 76% | 2956 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 88% | 54,607 psi | 90% | 2986 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 60% | 1808 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,128 psi | 89% | 2844 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,548 psi | 88% | 2877 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,143 psi | 89% | 2871 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 52,808 psi | 87% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,794 psi | 87% | 2871 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 98% | 51,967 psi | 85% | 2966 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 54,607 psi | 90% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,288 psi | 89% | 2867 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,228 psi | 86% | 2858 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,182 psi | 79% | 2812 fps | 99.5% |
| Norma 204 | <<locked>> | 90% | 54,128 psi | 89% | 2930 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 53,461 psi | 88% | 3018 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,752 psi | 90% | 2936 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 52,373 psi | 86% | 2986 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 53,301 psi | 88% | 2933 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,459 psi | 83% | 2920 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 1850 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,156 psi | 87% | 2854 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,867 psi | 88% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,257 psi | 86% | 2917 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,273 psi | 89% | 3002 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,398 psi | 76% | 2949 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 53,287 psi | 87% | 2851 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,781 psi | 90% | 2910 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 94% | 52,040 psi | 85% | 2917 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 52,431 psi | 86% | 2841 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,288 psi | 89% | 2867 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,607 psi | 90% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,228 psi | 86% | 2858 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,737 psi | 90% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,969 psi | 89% | 2730 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,708 psi | 88% | 2818 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,071 psi | 90% | 2969 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 53,214 psi | 87% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,910 psi | 87% | 2848 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 54,157 psi | 89% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,605 psi | 86% | 2890 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 54,375 psi | 89% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,156 psi | 87% | 2874 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 51,982 psi | 85% | 2867 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 55,085 psi | 90% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 52,214 psi | 86% | 2877 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,403 psi | 88% | 2943 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,664 psi | 88% | 3009 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,168 psi | 81% | 2917 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,504 psi | 86% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,578 psi | 90% | 2949 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,227 psi | 82% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,634 psi | 86% | 2887 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% | 31,473 psi | 52% | 2461 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 51,677 psi | 85% | 2782 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,958 psi | 66% | 2671 fps | 99.3% |
| Accurate High Country | 70.2 gr | 88% | 41,814 psi | 69% | 2802 fps | 95.2% |
| Accurate MAGPRO | 76.4 gr | 94% | 48,849 psi | 80% | 2927 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 48,515 psi | 80% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,464 psi | 63% | 2651 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 44,628 psi | 73% | 2812 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 98% | 35,215 psi | 58% | 2648 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,580 psi | 63% | 2651 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,269 psi | 81% | 2789 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,580 psi | 63% | 2680 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,816 psi | 72% | 2802 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,189 psi | 63% | 2644 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,508 psi | 63% | 2697 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,369 psi | 47% | 2438 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,240 psi | 50% | 2503 fps | 95.4% |
| Alliant Reloder-26 | 65.7 gr | 80% | 30,356 psi | 50% | 2552 fps | 96.5% |
| Bofors RP15 | <<locked>> | 90% | 38,189 psi | 63% | 2687 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,705 psi | 82% | 2802 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,292 psi | 66% | 2769 fps | 95.1% |
| Bofors RP5 | <<locked>> | 88% | 38,508 psi | 63% | 2697 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 43,497 psi | 71% | 2680 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 40,843 psi | 67% | 2723 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,980 psi | 82% | 2815 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,597 psi | 68% | 2713 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,469 psi | 73% | 2733 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 47,834 psi | 79% | 2822 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,775 psi | 77% | 2802 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,201 psi | 59% | 2569 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,971 psi | 62% | 2759 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 40,625 psi | 67% | 2730 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,398 psi | 45% | 1614 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,053 psi | 84% | 2795 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,073 psi | 64% | 2605 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,831 psi | 74% | 2707 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 38,276 psi | 63% | 2621 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,485 psi | 76% | 2759 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 42,598 psi | 70% | 2782 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 51,285 psi | 84% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,409 psi | 70% | 2657 fps | 98.9% |
| Lovex S070 | <<locked>> | 80% | 40,741 psi | 67% | 2644 fps | 97.7% |
| Lovex S071 | <<locked>> | 86% | 30,792 psi | 51% | 2441 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 41,321 psi | 68% | 2694 fps | 95.8% |
| Norma MRP | <<locked>> | 84% | 35,172 psi | 58% | 2648 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 39,494 psi | 65% | 2661 fps | 99.2% |
| Ramshot Grand | <<locked>> | 92% | 42,380 psi | 70% | 2792 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 38,203 psi | 63% | 2648 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 92% | 37,623 psi | 62% | 2664 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,934 psi | 46% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,806 psi | 82% | 2799 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,543 psi | 76% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,653 psi | 65% | 2690 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,159 psi | 63% | 2697 fps | 98.7% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,998 psi | 57% | 2677 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 46,847 psi | 77% | 2749 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,496 psi | 70% | 2687 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 39,813 psi | 65% | 2684 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 43,497 psi | 71% | 2680 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,409 psi | 70% | 2657 fps | 98.9% |
| Shooters World Precision | <<locked>> | 80% | 51,285 psi | 84% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,741 psi | 67% | 2644 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,906 psi | 79% | 2802 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,688 psi | 78% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,568 psi | 68% | 2602 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,494 psi | 65% | 2680 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 46,949 psi | 77% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,470 psi | 76% | 2736 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,955 psi | 59% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,607 psi | 58% | 2559 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 44,904 psi | 74% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,944 psi | 67% | 2661 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 37,449 psi | 61% | 2592 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 51,837 psi | 85% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,335 psi | 66% | 2661 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 31,604 psi | 52% | 2516 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 92% | 46,731 psi | 77% | 2884 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 96% | 42,946 psi | 71% | 2799 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,856 psi | 65% | 2625 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,800 psi | 69% | 2720 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,077 psi | 41% | 2418 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,813 psi | 65% | 2651 fps | 95.6% |
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 | Winchester FailSafe. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,064 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 1:13.0 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 | 180gr | Winchester FailSafe 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.