Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | NorthFork Bonded Core bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 2700 | <<locked>> | 82% | 55,100 psi | 90% | 2844 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 53,650 psi | 88% | 2897 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,694 psi | 90% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 51,953 psi | 85% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 52,040 psi | 85% | 2979 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 54,462 psi | 89% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,895 psi | 87% | 2933 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 54,041 psi | 89% | 2986 fps | 97.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,202 psi | 61% | 2700 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 51,967 psi | 85% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,678 psi | 86% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,925 psi | 89% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,417 psi | 86% | 2923 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,330 psi | 88% | 2982 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,085 psi | 89% | 2963 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,804 psi | 77% | 2900 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,273 psi | 89% | 3054 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,301 psi | 86% | 2966 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 52,678 psi | 86% | 2844 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,330 psi | 88% | 2982 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 52,214 psi | 86% | 2835 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,499 psi | 76% | 2838 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 82% | 52,997 psi | 87% | 2864 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,114 psi | 89% | 2940 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,635 psi | 88% | 2897 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 54,331 psi | 89% | 2930 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,156 psi | 87% | 2910 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,214 psi | 87% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,774 psi | 75% | 2943 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 54,114 psi | 89% | 2976 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 60% | 1804 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,853 psi | 88% | 2838 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,316 psi | 88% | 2874 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,679 psi | 88% | 2861 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 52,547 psi | 86% | 2881 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,402 psi | 86% | 2861 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 51,590 psi | 85% | 2959 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 54,302 psi | 89% | 2835 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,085 psi | 89% | 2861 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 52,025 psi | 85% | 2854 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,747 psi | 78% | 2802 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 54,940 psi | 90% | 2890 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,983 psi | 89% | 2927 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 53,055 psi | 87% | 3009 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,288 psi | 89% | 2927 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,953 psi | 85% | 2976 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 53,142 psi | 87% | 2930 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,879 psi | 82% | 2910 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,376 psi | 61% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,939 psi | 87% | 2851 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,301 psi | 88% | 2953 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 51,822 psi | 85% | 2910 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,838 psi | 88% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,919 psi | 75% | 2940 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 52,968 psi | 87% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,578 psi | 90% | 2904 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 55,085 psi | 90% | 2963 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 52,214 psi | 86% | 2835 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,085 psi | 89% | 2861 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,302 psi | 89% | 2835 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,025 psi | 85% | 2854 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,505 psi | 89% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,664 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,548 psi | 88% | 2815 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,621 psi | 90% | 2959 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 52,924 psi | 87% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,576 psi | 86% | 2838 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 53,882 psi | 88% | 2930 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,185 psi | 86% | 2881 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 54,114 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,707 psi | 87% | 2864 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,027 psi | 90% | 2910 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 54,868 psi | 90% | 2812 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 52,025 psi | 85% | 2874 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,113 psi | 87% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,214 psi | 87% | 2999 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 2907 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,156 psi | 86% | 2831 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,114 psi | 89% | 2940 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,676 psi | 82% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,996 psi | 85% | 2874 fps | 98.4% |
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 2700 | <<locked>> | 80% | 51,576 psi | 85% | 2789 fps | 98.8% |
| Accurate 3100 | <<locked>> | 82% | 31,241 psi | 51% | 2454 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,329 psi | 84% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,465 psi | 65% | 2661 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 48,472 psi | 80% | 2917 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,240 psi | 79% | 2759 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,654 psi | 67% | 2700 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 92% | 44,266 psi | 73% | 2802 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 34,969 psi | 57% | 2638 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,791 psi | 80% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,319 psi | 63% | 2674 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,555 psi | 72% | 2795 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,480 psi | 66% | 2697 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,116 psi | 63% | 2687 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,166 psi | 46% | 2428 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,921 psi | 49% | 2493 fps | 95.2% |
| Alliant Reloder-26 | 65.3 gr | 80% | 30,182 psi | 50% | 2546 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 40,321 psi | 66% | 2733 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,385 psi | 81% | 2795 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,116 psi | 63% | 2687 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,207 psi | 71% | 2671 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,323 psi | 71% | 2776 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 49,705 psi | 82% | 2808 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,365 psi | 68% | 2710 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,237 psi | 73% | 2726 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 47,442 psi | 78% | 2812 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,441 psi | 76% | 2792 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,926 psi | 59% | 2562 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,826 psi | 62% | 2753 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 40,234 psi | 66% | 2720 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,441 psi | 45% | 1614 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,763 psi | 83% | 2792 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,841 psi | 64% | 2602 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,599 psi | 73% | 2700 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,826 psi | 62% | 2612 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,311 psi | 76% | 2753 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 94% | 45,237 psi | 74% | 2835 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 50,995 psi | 84% | 2785 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,163 psi | 69% | 2651 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,509 psi | 67% | 2638 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 30,414 psi | 50% | 2431 fps | 95% |
| Norma 203B | <<locked>> | 80% | 51,401 psi | 84% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,075 psi | 67% | 2687 fps | 95.7% |
| Norma MRP | 66.5 gr | 84% | 34,838 psi | 57% | 2638 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,189 psi | 64% | 2654 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 42,018 psi | 69% | 2782 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,942 psi | 62% | 2641 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,318 psi | 61% | 2654 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 46% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,588 psi | 81% | 2795 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,238 psi | 76% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,218 psi | 64% | 2677 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,971 psi | 62% | 2690 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,751 psi | 57% | 2667 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 46,572 psi | 76% | 2743 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,078 psi | 74% | 2736 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 39,595 psi | 65% | 2677 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,207 psi | 71% | 2671 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,163 psi | 69% | 2651 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 50,995 psi | 84% | 2785 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,509 psi | 67% | 2638 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,616 psi | 78% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,398 psi | 78% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,350 psi | 68% | 2598 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,233 psi | 64% | 2674 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,673 psi | 77% | 2740 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,122 psi | 76% | 2726 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,679 psi | 59% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,230 psi | 58% | 2549 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 44,657 psi | 73% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,495 psi | 66% | 2648 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,072 psi | 61% | 2582 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,590 psi | 85% | 2766 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,074 psi | 66% | 2654 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,227 psi | 51% | 2503 fps | 97.8% |
| Vihtavuori N560 | 72.9 gr | 92% | 46,354 psi | 76% | 2874 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 98% | 45,498 psi | 75% | 2844 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,668 psi | 65% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,524 psi | 68% | 2710 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,903 psi | 41% | 2408 fps | 97% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,436 psi | 65% | 2641 fps | 95.4% |
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 81 powders for .300 Blaser Mag. loaded with the .308 | 180gr | NorthFork Bonded Core. Alliant Reloder-26 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,054 fps. ADI AR 2225 gives the best case fill at 100 %, and 81 of the 81 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 1:12.5 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | NorthFork Bonded Core 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.