Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Nosler Partition bullet and 86 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 High Country and Norma MRP.
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 2700 | <<locked>> | 82% | 53,301 psi | 88% | 2933 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,100 psi | 90% | 3038 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 52,736 psi | 87% | 2927 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,461 psi | 88% | 3035 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 52,417 psi | 86% | 3123 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 52,649 psi | 86% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,259 psi | 89% | 3077 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 98% | 51,996 psi | 85% | 3064 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,360 psi | 89% | 3071 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,534 psi | 88% | 2982 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,679 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,027 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 51,561 psi | 85% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,621 psi | 88% | 3064 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,621 psi | 90% | 3127 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,692 psi | 85% | 3054 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,976 psi | 74% | 2979 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 96% | 51,561 psi | 85% | 3140 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,009 psi | 82% | 3041 fps | 97.5% |
| Bofors RP3 | <<locked>> | 84% | 54,346 psi | 89% | 2999 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,621 psi | 90% | 3127 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 53,693 psi | 88% | 2982 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 54,650 psi | 90% | 3015 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 51,967 psi | 85% | 3028 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 51,895 psi | 85% | 2986 fps | 98% |
| Hodgdon H4831 | <<locked>> | 96% | 52,286 psi | 86% | 3012 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,578 psi | 90% | 3051 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,505 psi | 89% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,976 psi | 72% | 3009 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 88% | 51,880 psi | 85% | 3061 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 60% | 1890 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,156 psi | 86% | 2940 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,549 psi | 90% | 2972 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 54,650 psi | 90% | 3015 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 51,967 psi | 85% | 2953 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 53,954 psi | 89% | 3028 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,056 psi | 90% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,766 psi | 88% | 2999 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,069 psi | 87% | 3097 fps | 96.9% |
| Lovex S062 | <<locked>> | 82% | 52,533 psi | 86% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,199 psi | 86% | 2953 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 53,403 psi | 88% | 2995 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,643 psi | 75% | 2881 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 52,982 psi | 87% | 2989 fps | 100% |
| Norma 204 | <<locked>> | 90% | 51,996 psi | 85% | 3012 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 54,186 psi | 89% | 3153 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 52,214 psi | 86% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,693 psi | 88% | 3015 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,519 psi | 88% | 3117 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 92% | 54,549 psi | 90% | 3074 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,819 psi | 79% | 2982 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 61% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,534 psi | 90% | 2995 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,781 psi | 90% | 3107 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,185 psi | 87% | 3054 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 51,576 psi | 85% | 3081 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,947 psi | 72% | 2999 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 54,331 psi | 89% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,476 psi | 89% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,475 psi | 86% | 2989 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 96% | 53,026 psi | 87% | 3051 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 53,693 psi | 88% | 2982 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,199 psi | 86% | 2953 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 52,533 psi | 86% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,403 psi | 88% | 2995 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,417 psi | 86% | 2999 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,040 psi | 85% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 55,114 psi | 90% | 2956 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,562 psi | 86% | 3045 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 54,476 psi | 89% | 2992 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,288 psi | 89% | 2982 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 55,114 psi | 90% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,737 psi | 88% | 3028 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 54,650 psi | 90% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,897 psi | 90% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,214 psi | 86% | 2913 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,288 psi | 89% | 3015 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,968 psi | 87% | 2999 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 53,113 psi | 87% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,388 psi | 88% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,114 psi | 89% | 3081 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,447 psi | 89% | 3140 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,751 psi | 88% | 2976 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,199 psi | 86% | 3031 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,731 psi | 77% | 3117 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,824 psi | 88% | 3018 fps | 98% |
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% | 49,951 psi | 82% | 2877 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 34,055 psi | 56% | 2628 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 49,530 psi | 81% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,739 psi | 62% | 2736 fps | 98.4% |
| Accurate High Country | 75 gr | 92% | 45,426 psi | 75% | 2989 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 46,601 psi | 77% | 2851 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,800 psi | 69% | 2831 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 96% | 48,747 psi | 80% | 3002 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,959 psi | 69% | 2835 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,152 psi | 77% | 2874 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,270 psi | 83% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,767 psi | 60% | 2746 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,771 psi | 69% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,495 psi | 68% | 2828 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,756 psi | 69% | 2877 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,050 psi | 44% | 2490 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,677 psi | 54% | 2674 fps | 95.5% |
| Alliant Reloder-26 | 68.9 gr | 82% | 30,922 psi | 51% | 2667 fps | 95.6% |
| Bofors RP15 | <<locked>> | 94% | 41,191 psi | 68% | 2864 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 47,543 psi | 78% | 2887 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,756 psi | 69% | 2877 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 41,814 psi | 69% | 2753 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 47,921 psi | 79% | 2900 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 39,784 psi | 65% | 2785 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,612 psi | 70% | 2805 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 94% | 48,834 psi | 80% | 2949 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,169 psi | 84% | 2992 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,345 psi | 56% | 2635 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,133 psi | 68% | 2936 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 38,653 psi | 63% | 2792 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 45% | 1693 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,023 psi | 80% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,358 psi | 84% | 2917 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 37,434 psi | 61% | 2674 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,221 psi | 71% | 2785 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 36,289 psi | 60% | 2687 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 51,590 psi | 85% | 2976 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,647 psi | 83% | 2943 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 96% | 46,499 psi | 76% | 2972 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 49,211 psi | 81% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,756 psi | 67% | 2733 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,030 psi | 64% | 2713 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 33,040 psi | 54% | 2602 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 49,647 psi | 82% | 2933 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,250 psi | 69% | 2822 fps | 95.1% |
| Norma MRP | 71.8 gr | 88% | 38,334 psi | 63% | 2831 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 37,637 psi | 62% | 2733 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 50,082 psi | 82% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,427 psi | 76% | 2982 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 36,477 psi | 60% | 2717 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 38,479 psi | 63% | 2785 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,760 psi | 46% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,950 psi | 79% | 2881 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,353 psi | 73% | 2933 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,536 psi | 62% | 2753 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,434 psi | 60% | 2759 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,276 psi | 63% | 2858 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 51,097 psi | 84% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,875 psi | 74% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,340 psi | 76% | 2874 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 88% | 40,611 psi | 67% | 2808 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,814 psi | 69% | 2753 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,756 psi | 67% | 2733 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 49,211 psi | 81% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,030 psi | 64% | 2713 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,934 psi | 75% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,876 psi | 75% | 2733 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,929 psi | 66% | 2677 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,917 psi | 70% | 2861 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 45,092 psi | 74% | 2831 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,720 psi | 83% | 2920 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 34,040 psi | 56% | 2687 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 38,696 psi | 64% | 2736 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 51,300 psi | 84% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,619 psi | 85% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,091 psi | 71% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,899 psi | 64% | 2730 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 40,567 psi | 67% | 2766 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,850 psi | 82% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,464 psi | 63% | 2733 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 29,733 psi | 49% | 2569 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 94% | 47,630 psi | 78% | 3012 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,130 psi | 63% | 2697 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 39,784 psi | 65% | 2785 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,483 psi | 42% | 2516 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,584 psi | 72% | 2835 fps | 95.8% |
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 86 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Nosler Partition. Norma MRP delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,153 fps. Accurate 3100 gives the best case fill at 100 %, and 86 of the 86 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 165.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, 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, Accurate High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | Nosler Partition 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.