Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 175gr | Prvi Partizan FMJ BT 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, 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.
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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% | 53,838 psi | 88% | 2858 fps | 98.9% |
| Accurate 3100 | <<locked>> | 98% | 52,011 psi | 85% | 2907 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 53,519 psi | 88% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,244 psi | 89% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,085 psi | 89% | 3051 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 53,461 psi | 88% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,984 psi | 90% | 3002 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 52,649 psi | 86% | 2995 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,230 psi | 89% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,317 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,940 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,315 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,389 psi | 89% | 2989 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 51,721 psi | 85% | 2992 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,402 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,426 psi | 75% | 2910 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,388 psi | 86% | 3064 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2972 fps | 98% |
| Bofors RP3 | <<locked>> | 84% | 54,969 psi | 90% | 2917 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 51,721 psi | 85% | 2992 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 54,302 psi | 89% | 2907 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,223 psi | 74% | 2844 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 82% | 51,895 psi | 85% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,692 psi | 87% | 2953 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 52,562 psi | 86% | 2913 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 96% | 52,881 psi | 87% | 2940 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,706 psi | 85% | 2920 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,735 psi | 85% | 2884 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,628 psi | 73% | 2949 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 88% | 52,562 psi | 86% | 2986 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 60% | 1824 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,808 psi | 87% | 2858 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,011 psi | 85% | 2887 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,707 psi | 87% | 2881 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 54,491 psi | 89% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,418 psi | 89% | 2927 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,824 psi | 88% | 3028 fps | 97.5% |
| Lovex S062 | <<locked>> | 82% | 53,040 psi | 87% | 2851 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,779 psi | 87% | 2877 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,983 psi | 89% | 2920 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,296 psi | 76% | 2812 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 53,635 psi | 88% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,518 psi | 86% | 2936 fps | 98.1% |
| Norma MRP | <<locked>> | 96% | 51,372 psi | 84% | 3018 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 52,823 psi | 87% | 2943 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,447 psi | 89% | 2936 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,302 psi | 89% | 3048 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 51,663 psi | 85% | 2943 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,341 psi | 79% | 2917 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1870 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 51,677 psi | 85% | 2864 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,779 psi | 85% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,925 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,344 psi | 86% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,541 psi | 73% | 2940 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 54,998 psi | 90% | 2864 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,056 psi | 90% | 2913 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,243 psi | 87% | 2917 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 96% | 53,751 psi | 88% | 2979 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 54,302 psi | 89% | 2907 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,779 psi | 87% | 2877 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,040 psi | 87% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,983 psi | 89% | 2920 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,098 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,692 psi | 87% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,301 psi | 86% | 2828 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,287 psi | 87% | 2972 fps | 98.5% |
| Somchem S355 | <<locked>> | 86% | 54,969 psi | 90% | 2910 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,781 psi | 90% | 2907 fps | 96.8% |
| Somchem S365 | <<locked>> | 92% | 52,243 psi | 86% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,346 psi | 89% | 2953 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 86% | 52,794 psi | 87% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,940 psi | 90% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,505 psi | 88% | 2923 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 53,824 psi | 88% | 2835 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,172 psi | 89% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,984 psi | 90% | 3005 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,706 psi | 85% | 3009 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,239 psi | 78% | 2913 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,505 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,866 psi | 87% | 2956 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,645 psi | 78% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,317 psi | 89% | 2943 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 2700 | <<locked>> | 80% | 50,401 psi | 83% | 2802 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 32,358 psi | 53% | 2513 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,212 psi | 82% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,421 psi | 63% | 2674 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 50,401 psi | 83% | 2986 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 47,123 psi | 77% | 2772 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 42,366 psi | 70% | 2769 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 94% | 46,166 psi | 76% | 2871 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,776 psi | 78% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,995 psi | 84% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,275 psi | 61% | 2680 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,453 psi | 70% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 39,378 psi | 65% | 2703 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,639 psi | 65% | 2753 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,470 psi | 45% | 2438 fps | 97.1% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,082 psi | 51% | 2556 fps | 95.3% |
| Alliant Reloder-26 | 65.1 gr | 80% | 29,211 psi | 48% | 2543 fps | 95.3% |
| Bofors RP15 | <<locked>> | 94% | 41,727 psi | 69% | 2799 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 48,312 psi | 79% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,639 psi | 65% | 2753 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 42,351 psi | 70% | 2687 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 42,322 psi | 69% | 2782 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 48,486 psi | 80% | 2825 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,364 psi | 66% | 2720 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 43,294 psi | 71% | 2743 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 49,269 psi | 81% | 2877 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,443 psi | 80% | 2861 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,838 psi | 57% | 2572 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,146 psi | 64% | 2812 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 39,305 psi | 65% | 2730 fps | 96.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 45% | 1631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,574 psi | 81% | 2808 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,014 psi | 62% | 2612 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,729 psi | 72% | 2717 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 36,869 psi | 61% | 2621 fps | 98.6% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,066 psi | 79% | 2818 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 46,963 psi | 77% | 2900 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 49,995 psi | 82% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,278 psi | 68% | 2667 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 39,421 psi | 65% | 2644 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 31,488 psi | 52% | 2490 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 50,343 psi | 83% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,844 psi | 70% | 2756 fps | 95.9% |
| Norma MRP | 68 gr | 86% | 36,318 psi | 60% | 2707 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 38,072 psi | 63% | 2664 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 50,865 psi | 84% | 2881 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,801 psi | 72% | 2848 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 37,028 psi | 61% | 2654 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 39,059 psi | 64% | 2726 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,385 psi | 79% | 2805 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,092 psi | 74% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,174 psi | 63% | 2690 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,072 psi | 61% | 2700 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,056 psi | 59% | 2730 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,634 psi | 85% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,324 psi | 74% | 2756 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,918 psi | 72% | 2746 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 41,249 psi | 68% | 2746 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 42,351 psi | 70% | 2687 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,278 psi | 68% | 2667 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 49,995 psi | 82% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,421 psi | 65% | 2644 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,572 psi | 76% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,485 psi | 76% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,292 psi | 66% | 2608 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,872 psi | 67% | 2740 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 45,687 psi | 75% | 2756 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,993 psi | 79% | 2792 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 34,650 psi | 57% | 2625 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,651 psi | 60% | 2612 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 43,526 psi | 71% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,523 psi | 65% | 2664 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 38,580 psi | 63% | 2648 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 50,372 psi | 83% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,986 psi | 64% | 2664 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 30,284 psi | 50% | 2513 fps | 97.1% |
| Vihtavuori N560 | 74.3 gr | 94% | 48,225 psi | 79% | 2943 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 44,222 psi | 73% | 2854 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,609 psi | 63% | 2631 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,364 psi | 66% | 2720 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,250 psi | 40% | 2405 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,147 psi | 68% | 2710 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 90 powders for .300 Blaser Mag. loaded with the .308 | 175gr | Prvi Partizan FMJ BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,064 fps. ADI AR 2217 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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 | 175gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.