Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Frontier BTSP bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-17.
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 2495 | <<locked>> | 82% | 53,374 psi | 88% | 2877 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,592 psi | 90% | 2940 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,011 psi | 85% | 2982 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 53,635 psi | 88% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,215 psi | 89% | 3038 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 53,098 psi | 87% | 3127 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 86% | 53,925 psi | 89% | 2963 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,793 psi | 85% | 3018 fps | 97.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,040 psi | 87% | 3068 fps | 96.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,823 psi | 87% | 3084 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,895 psi | 85% | 3015 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,491 psi | 89% | 2986 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,824 psi | 90% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,810 psi | 90% | 3094 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,475 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,563 psi | 90% | 3064 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,677 psi | 85% | 3064 fps | 97.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,660 psi | 80% | 2999 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,641 psi | 70% | 2917 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,098 psi | 86% | 3140 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 2986 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 51,895 psi | 85% | 2949 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,677 psi | 85% | 3064 fps | 97.7% |
| Bofors RP7 | <<locked>> | 90% | 54,795 psi | 90% | 2986 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 52,388 psi | 86% | 2966 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 52,779 psi | 87% | 3031 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 52,808 psi | 87% | 2989 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,114 psi | 90% | 3012 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,301 psi | 88% | 3002 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,808 psi | 87% | 3064 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,274 psi | 60% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,317 psi | 89% | 2969 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,490 psi | 88% | 2946 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,649 psi | 86% | 2923 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 52,359 psi | 86% | 2963 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,185 psi | 87% | 2959 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 54,621 psi | 90% | 3025 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 52,779 psi | 87% | 2982 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,926 psi | 90% | 3002 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 54,940 psi | 90% | 2930 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,606 psi | 88% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,142 psi | 87% | 2956 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 54,273 psi | 89% | 2995 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,076 psi | 71% | 2822 fps | 98% |
| Norma 201 | <<locked>> | 82% | 54,998 psi | 90% | 2953 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,128 psi | 89% | 2995 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,794 psi | 87% | 3012 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 54,868 psi | 90% | 3153 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 52,910 psi | 87% | 3022 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,853 psi | 90% | 3022 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,647 psi | 83% | 3048 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 92% | 51,750 psi | 85% | 3018 fps | 99.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,020 psi | 74% | 2917 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,927 psi | 61% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,286 psi | 86% | 2946 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 51,924 psi | 85% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,085 psi | 89% | 3061 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,678 psi | 86% | 3087 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,597 psi | 68% | 2930 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 52,257 psi | 86% | 2900 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 51,967 psi | 85% | 2946 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,635 psi | 88% | 2992 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 98% | 53,635 psi | 88% | 3048 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 54,795 psi | 90% | 2986 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,142 psi | 87% | 2956 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 53,606 psi | 88% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,273 psi | 89% | 2995 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,490 psi | 88% | 3005 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,636 psi | 90% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,243 psi | 87% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,808 psi | 87% | 2904 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,156 psi | 87% | 3045 fps | 97.9% |
| Somchem S355 | <<locked>> | 86% | 52,098 psi | 86% | 2943 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 52,011 psi | 85% | 3025 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,491 psi | 89% | 3025 fps | 98.7% |
| Vihtavuori N135 | <<locked>> | 82% | 52,518 psi | 86% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,634 psi | 86% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,330 psi | 88% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 51,706 psi | 85% | 2963 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,227 psi | 82% | 2940 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 54,462 psi | 89% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,346 psi | 89% | 3022 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,549 psi | 90% | 3081 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,810 psi | 90% | 2982 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,011 psi | 87% | 3035 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,961 psi | 72% | 3054 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,636 psi | 90% | 2989 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,650 psi | 90% | 3018 fps | 97.9% |
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 2495 | <<locked>> | 80% | 49,937 psi | 82% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,877 psi | 79% | 2825 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 34,476 psi | 57% | 2635 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,297 psi | 78% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,781 psi | 59% | 2684 fps | 97.7% |
| Accurate High Country | <<locked>> | 94% | 45,919 psi | 75% | 2989 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 44,904 psi | 74% | 2805 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 42,554 psi | 70% | 2838 fps | 95% |
| ADI AR 2213 | <<locked>> | 98% | 49,617 psi | 81% | 3002 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,197 psi | 81% | 3022 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,670 psi | 70% | 2838 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,121 psi | 74% | 2828 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,254 psi | 79% | 2900 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,201 psi | 58% | 2697 fps | 97.8% |
| Alliant Reloder-17 | 62.7 gr | 80% | 39,610 psi | 65% | 2825 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,177 psi | 69% | 2831 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,192 psi | 69% | 2877 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,701 psi | 42% | 2434 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,025 psi | 54% | 2671 fps | 95.2% |
| Alliant Reloder-26 | 67.5 gr | 84% | 31,328 psi | 51% | 2671 fps | 95.5% |
| Bofors RP15 | <<locked>> | 98% | 44,425 psi | 73% | 2923 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 45,498 psi | 75% | 2841 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,192 psi | 69% | 2877 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 40,103 psi | 66% | 2703 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 45,832 psi | 75% | 2848 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 37,869 psi | 62% | 2733 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 43,613 psi | 72% | 2815 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,692 psi | 54% | 2589 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,995 psi | 82% | 2949 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,610 psi | 65% | 2802 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 45% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,966 psi | 84% | 2913 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,195 psi | 77% | 2841 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,429 psi | 81% | 2867 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 40,799 psi | 67% | 2740 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,539 psi | 68% | 2736 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 34,505 psi | 57% | 2635 fps | 97.3% |
| IMR 4895 | <<locked>> | 80% | 49,487 psi | 81% | 2930 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,561 psi | 85% | 2946 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 51,808 psi | 85% | 2881 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,340 psi | 78% | 2838 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,044 psi | 64% | 2687 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 37,347 psi | 61% | 2664 fps | 95.5% |
| Lovex S071 | <<locked>> | 92% | 33,228 psi | 55% | 2602 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,547 psi | 85% | 2900 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,601 psi | 78% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,105 psi | 71% | 2828 fps | 95.1% |
| Norma MRP | <<locked>> | 90% | 38,798 psi | 64% | 2835 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,810 psi | 59% | 2680 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,834 psi | 79% | 2907 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,065 psi | 77% | 2979 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 34,708 psi | 57% | 2664 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 41,872 psi | 69% | 2848 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,470 psi | 45% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,876 psi | 75% | 2828 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,105 psi | 69% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,578 psi | 58% | 2700 fps | 97.3% |
| ReloadSwiss RS 70 | 63.7 gr | 80% | 34,708 psi | 57% | 2703 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,638 psi | 63% | 2854 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 49,197 psi | 81% | 2851 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,844 psi | 70% | 2785 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,079 psi | 77% | 2874 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 44,034 psi | 72% | 2874 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 40,103 psi | 66% | 2703 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,044 psi | 64% | 2687 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 47,340 psi | 78% | 2838 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,347 psi | 61% | 2664 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,903 psi | 72% | 2841 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,300 psi | 84% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,309 psi | 73% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,189 psi | 63% | 2625 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,613 psi | 72% | 2867 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 43,105 psi | 71% | 2782 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,242 psi | 53% | 2635 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 39,160 psi | 64% | 2736 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 49,356 psi | 81% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,603 psi | 81% | 2828 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,234 psi | 68% | 2713 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,130 psi | 61% | 2680 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 41,162 psi | 68% | 2769 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,819 psi | 79% | 2822 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,608 psi | 60% | 2680 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,978 psi | 46% | 2513 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,463 psi | 60% | 2651 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 37,869 psi | 62% | 2733 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,744 psi | 42% | 2516 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,271 psi | 84% | 2933 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,266 psi | 73% | 2835 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 88 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Frontier BTSP. Norma MRP delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,870 fps to 3,153 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 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 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | Frontier BTSP 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.