Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Sellier & Bellot XRG bullet and 82 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 53,635 psi | 88% | 2890 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,882 psi | 90% | 2822 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,098 psi | 86% | 2884 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,853 psi | 90% | 3038 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 96% | 51,967 psi | 85% | 2976 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 54,418 psi | 89% | 2851 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,736 psi | 87% | 2927 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,969 psi | 89% | 2979 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 2700 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,982 psi | 87% | 2927 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,214 psi | 86% | 2828 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,692 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,925 psi | 89% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 52,301 psi | 86% | 2917 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 53,214 psi | 87% | 2976 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,954 psi | 89% | 2959 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,775 psi | 77% | 2897 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,186 psi | 89% | 3051 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,243 psi | 86% | 2959 fps | 98.5% |
| Bofors RP3 | <<locked>> | 82% | 52,997 psi | 87% | 2848 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 53,214 psi | 87% | 2976 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 52,301 psi | 86% | 2831 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,485 psi | 76% | 2835 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 53,040 psi | 87% | 2861 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 53,954 psi | 89% | 2936 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 53,650 psi | 88% | 2894 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 96% | 54,215 psi | 89% | 2923 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 53,040 psi | 87% | 2904 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,258 psi | 87% | 2864 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,992 psi | 76% | 2943 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 54,041 psi | 89% | 2972 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,680 psi | 60% | 1801 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,027 psi | 89% | 2838 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,171 psi | 87% | 2864 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,693 psi | 88% | 2858 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 52,649 psi | 86% | 2877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,272 psi | 86% | 2854 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 51,735 psi | 85% | 2956 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 54,331 psi | 89% | 2831 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,143 psi | 89% | 2858 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 52,112 psi | 86% | 2848 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,993 psi | 79% | 2802 fps | 99.5% |
| Norma 203B | <<locked>> | 82% | 54,969 psi | 90% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,809 psi | 88% | 2920 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 52,939 psi | 87% | 3005 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 54,346 psi | 89% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,909 psi | 85% | 2969 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 52,968 psi | 87% | 2923 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,922 psi | 82% | 2904 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 61% | 1844 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,982 psi | 87% | 2848 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,330 psi | 88% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 51,967 psi | 85% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,737 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,992 psi | 76% | 2936 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 53,084 psi | 87% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,447 psi | 89% | 2897 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 51,648 psi | 85% | 2904 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 52,301 psi | 86% | 2831 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,143 psi | 89% | 2858 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,331 psi | 89% | 2831 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,112 psi | 86% | 2848 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,520 psi | 90% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,867 psi | 88% | 2723 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,621 psi | 88% | 2808 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,737 psi | 90% | 2956 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 52,982 psi | 87% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 52,504 psi | 86% | 2835 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 53,751 psi | 88% | 2923 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,330 psi | 86% | 2881 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 54,186 psi | 89% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,779 psi | 87% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 51,517 psi | 85% | 2854 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,897 psi | 90% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 52,112 psi | 86% | 2871 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,084 psi | 87% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 53,200 psi | 87% | 2995 fps | 97.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,820 psi | 80% | 2904 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,214 psi | 86% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,172 psi | 89% | 2940 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,603 psi | 81% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,185 psi | 86% | 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 3100 | <<locked>> | 82% | 31,459 psi | 52% | 2454 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,692 psi | 85% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,784 psi | 65% | 2661 fps | 99.3% |
| Accurate High Country | <<locked>> | 88% | 41,582 psi | 68% | 2789 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 48,428 psi | 80% | 2913 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 48,211 psi | 79% | 2753 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 40,683 psi | 67% | 2694 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 44,396 psi | 73% | 2802 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 35,056 psi | 58% | 2635 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 38,421 psi | 63% | 2641 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,994 psi | 80% | 2779 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,348 psi | 63% | 2671 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,584 psi | 72% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,567 psi | 67% | 2690 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,290 psi | 63% | 2684 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,413 psi | 47% | 2431 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,095 psi | 49% | 2493 fps | 95.2% |
| Alliant Reloder-26 | 64.8 gr | 80% | 30,342 psi | 50% | 2546 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 40,466 psi | 66% | 2733 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,472 psi | 81% | 2792 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 38,290 psi | 63% | 2684 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,453 psi | 71% | 2671 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 98% | 43,526 psi | 71% | 2772 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 49,763 psi | 82% | 2805 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,582 psi | 68% | 2707 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,251 psi | 73% | 2723 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 47,369 psi | 78% | 2805 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 92% | 46,514 psi | 76% | 2789 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,955 psi | 59% | 2559 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 37,869 psi | 62% | 2746 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 40,364 psi | 66% | 2720 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 45% | 1608 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,705 psi | 83% | 2785 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,030 psi | 64% | 2598 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,802 psi | 74% | 2700 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 38,101 psi | 63% | 2612 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,180 psi | 76% | 2746 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 45,179 psi | 74% | 2828 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,039 psi | 84% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,424 psi | 70% | 2651 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,567 psi | 67% | 2631 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 30,806 psi | 51% | 2438 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 51,634 psi | 85% | 2835 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,147 psi | 68% | 2684 fps | 95.7% |
| Norma MRP | 66 gr | 84% | 34,954 psi | 57% | 2635 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,276 psi | 64% | 2651 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 42,047 psi | 69% | 2776 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 38,029 psi | 62% | 2638 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,521 psi | 62% | 2657 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 46% | 1647 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,603 psi | 81% | 2789 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,253 psi | 76% | 2838 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,494 psi | 65% | 2680 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,058 psi | 62% | 2687 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,853 psi | 57% | 2664 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 46,659 psi | 77% | 2740 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,165 psi | 74% | 2733 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 86% | 39,697 psi | 65% | 2677 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,453 psi | 71% | 2671 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,424 psi | 70% | 2651 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 51,039 psi | 84% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,567 psi | 67% | 2631 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,630 psi | 78% | 2792 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,558 psi | 78% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,452 psi | 68% | 2595 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,320 psi | 65% | 2671 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 46,905 psi | 77% | 2736 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,093 psi | 76% | 2720 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 35,911 psi | 59% | 2612 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,520 psi | 58% | 2549 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 44,686 psi | 73% | 2664 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,712 psi | 67% | 2648 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,188 psi | 61% | 2582 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,619 psi | 85% | 2762 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,161 psi | 66% | 2651 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,502 psi | 52% | 2507 fps | 97.8% |
| Vihtavuori N560 | 72.3 gr | 92% | 46,296 psi | 76% | 2867 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 45,745 psi | 75% | 2848 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,769 psi | 65% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,582 psi | 68% | 2707 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,106 psi | 41% | 2411 fps | 97.1% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,595 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 82 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Sellier & Bellot XRG. Alliant Reloder-26 delivers the highest muzzle velocity at 3,051 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,051 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 1:12.0 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Sellier & Bellot XRG 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.