Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Swift A-Frame 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, Norma MRP and Vihtavuori N560.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 54,911 psi | 90% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,243 psi | 87% | 2910 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,417 psi | 88% | 3012 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 52,199 psi | 86% | 2831 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,969 psi | 89% | 2959 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 51,779 psi | 85% | 2956 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,159 psi | 63% | 2730 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,143 psi | 89% | 2956 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,055 psi | 87% | 2851 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,940 psi | 89% | 2966 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,459 psi | 84% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,476 psi | 88% | 2946 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,781 psi | 90% | 3012 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 51,967 psi | 85% | 2936 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,109 psi | 79% | 2930 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,735 psi | 85% | 3018 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,548 psi | 88% | 2989 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 53,780 psi | 88% | 2867 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,947 psi | 72% | 2851 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 54,781 psi | 90% | 3012 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 53,142 psi | 87% | 2858 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,413 psi | 78% | 2867 fps | 97.3% |
| Hodgdon H380 | <<locked>> | 82% | 53,998 psi | 89% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 51,721 psi | 85% | 2907 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,795 psi | 90% | 2923 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 51,822 psi | 85% | 2894 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,331 psi | 89% | 2936 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,462 psi | 89% | 2890 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,007 psi | 77% | 2976 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 86% | 51,532 psi | 85% | 2940 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 60% | 1814 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,926 psi | 90% | 2861 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,375 psi | 89% | 2897 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,549 psi | 90% | 2884 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 53,737 psi | 88% | 2904 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,359 psi | 88% | 2884 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 98% | 52,953 psi | 87% | 2989 fps | 97.8% |
| Lovex S065 | <<locked>> | 88% | 54,984 psi | 90% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,895 psi | 87% | 2874 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,023 psi | 80% | 2828 fps | 99.6% |
| Norma 204 | <<locked>> | 90% | 55,013 psi | 90% | 2949 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 54,331 psi | 89% | 3035 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 51,880 psi | 85% | 2894 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,374 psi | 88% | 3005 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 54,201 psi | 89% | 2949 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,387 psi | 84% | 2940 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,405 psi | 61% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,853 psi | 88% | 2871 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,679 psi | 90% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,982 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,271 psi | 84% | 2956 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,181 psi | 77% | 2972 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,070 psi | 89% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,228 psi | 86% | 2874 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 52,895 psi | 87% | 2933 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 53,142 psi | 87% | 2858 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,984 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,895 psi | 87% | 2874 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 51,953 psi | 85% | 2871 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,491 psi | 89% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,360 psi | 89% | 2835 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,446 psi | 86% | 2930 fps | 98.7% |
| Somchem S355 | <<locked>> | 84% | 53,983 psi | 89% | 2861 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,592 psi | 88% | 2864 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 51,721 psi | 85% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,417 psi | 88% | 2910 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 86% | 55,071 psi | 90% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,911 psi | 89% | 2887 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,736 psi | 87% | 2884 fps | 99% |
| Vihtavuori N550 | <<locked>> | 88% | 53,127 psi | 87% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,317 psi | 89% | 2963 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,462 psi | 89% | 3028 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,198 psi | 82% | 2936 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,330 psi | 88% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 51,721 psi | 85% | 2907 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,488 psi | 85% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,417 psi | 88% | 2904 fps | 98.7% |
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% | 31,937 psi | 52% | 2474 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 40,524 psi | 67% | 2687 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 46,354 psi | 76% | 2881 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 49,052 psi | 81% | 2776 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 38,885 psi | 64% | 2664 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 45,339 psi | 74% | 2831 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 96% | 33,649 psi | 55% | 2608 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,189 psi | 64% | 2671 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,864 psi | 82% | 2802 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,146 psi | 64% | 2697 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,570 psi | 73% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,798 psi | 64% | 2664 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,088 psi | 64% | 2713 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,819 psi | 47% | 2454 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,690 psi | 50% | 2520 fps | 95.8% |
| Alliant Reloder-26 | 66.6 gr | 80% | 30,908 psi | 51% | 2569 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 38,740 psi | 64% | 2703 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,488 psi | 83% | 2818 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,017 psi | 67% | 2789 fps | 95.5% |
| Bofors RP5 | <<locked>> | 88% | 39,088 psi | 64% | 2713 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 43,976 psi | 72% | 2694 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 41,510 psi | 68% | 2743 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 50,517 psi | 83% | 2828 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,279 psi | 69% | 2733 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 45,165 psi | 74% | 2753 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 45,179 psi | 74% | 2776 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,572 psi | 78% | 2822 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,738 psi | 60% | 2585 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,638 psi | 63% | 2779 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 41,220 psi | 68% | 2746 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 45% | 1621 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,619 psi | 85% | 2808 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,552 psi | 65% | 2621 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,324 psi | 74% | 2720 fps | 98.4% |
| IMR 4831 | <<locked>> | 80% | 38,798 psi | 64% | 2635 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,251 psi | 73% | 2720 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 92% | 43,308 psi | 71% | 2802 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 42,917 psi | 70% | 2671 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 41,234 psi | 68% | 2657 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 31,270 psi | 51% | 2457 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 39,175 psi | 64% | 2651 fps | 95.2% |
| Norma MRP | 67.9 gr | 84% | 35,752 psi | 59% | 2664 fps | 96% |
| Norma URP | <<locked>> | 80% | 40,001 psi | 66% | 2677 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 43,120 psi | 71% | 2812 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 38,841 psi | 64% | 2664 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 90% | 35,679 psi | 59% | 2621 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,007 psi | 46% | 1660 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,517 psi | 83% | 2815 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,355 psi | 78% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,321 psi | 66% | 2707 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,769 psi | 64% | 2713 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,549 psi | 58% | 2697 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 47,427 psi | 78% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,120 psi | 71% | 2703 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 84% | 37,927 psi | 62% | 2644 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 43,976 psi | 72% | 2694 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,917 psi | 70% | 2671 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 41,234 psi | 68% | 2657 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,631 psi | 80% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,269 psi | 79% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,003 psi | 69% | 2618 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,579 psi | 62% | 2638 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 47,500 psi | 78% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,992 psi | 77% | 2749 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 36,550 psi | 60% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,056 psi | 59% | 2572 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 45,469 psi | 75% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,452 psi | 68% | 2674 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 88% | 38,014 psi | 62% | 2612 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 40,799 psi | 67% | 2674 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,169 psi | 53% | 2530 fps | 98.2% |
| Vihtavuori N560 | 72.8 gr | 90% | 44,425 psi | 73% | 2838 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 43,729 psi | 72% | 2815 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,437 psi | 66% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,482 psi | 70% | 2736 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,512 psi | 42% | 2438 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,826 psi | 62% | 2612 fps | 95% |
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 | Swift A-Frame. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,064 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, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Swift A-Frame 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.