Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Sierra Pro-Hunter bullet and 83 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 Hodgdon Superformance.
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% | 52,968 psi | 87% | 3018 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,520 psi | 90% | 3081 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,735 psi | 85% | 3114 fps | 99% |
| Accurate 4064 | <<locked>> | 84% | 53,403 psi | 88% | 3077 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,114 psi | 89% | 3179 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 52,794 psi | 87% | 3258 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 53,606 psi | 88% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,576 psi | 85% | 3153 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,533 psi | 86% | 3228 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,085 psi | 90% | 3212 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,259 psi | 89% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,694 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,723 psi | 90% | 3241 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,272 psi | 86% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,302 psi | 89% | 3202 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,517 psi | 85% | 3199 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,588 psi | 80% | 3136 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,453 psi | 70% | 3038 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 51,953 psi | 85% | 3278 fps | 99.9% |
| Bofors RP3 | <<locked>> | 84% | 51,648 psi | 85% | 3094 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,517 psi | 85% | 3199 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,621 psi | 90% | 3123 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 52,069 psi | 85% | 3104 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 90% | 52,634 psi | 86% | 3169 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 52,620 psi | 86% | 3127 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,955 psi | 90% | 3156 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,200 psi | 87% | 3150 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,794 psi | 87% | 3205 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 59% | 1985 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,172 psi | 89% | 3114 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,142 psi | 87% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,402 psi | 86% | 3064 fps | 98.3% |
| IMR 4350 | <<locked>> | 92% | 52,315 psi | 86% | 3104 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,953 psi | 87% | 3097 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 54,578 psi | 90% | 3169 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 52,605 psi | 86% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,810 psi | 90% | 3077 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,258 psi | 87% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,040 psi | 87% | 3097 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 54,317 psi | 89% | 3140 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,931 psi | 70% | 2946 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 54,520 psi | 90% | 3097 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,954 psi | 89% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,837 psi | 87% | 3150 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,839 psi | 90% | 3294 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 52,881 psi | 87% | 3166 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,578 psi | 90% | 3163 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 51,750 psi | 85% | 3159 fps | 99% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,121 psi | 74% | 3041 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 60% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,185 psi | 86% | 3087 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 51,750 psi | 85% | 3202 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,940 psi | 89% | 3199 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,388 psi | 86% | 3225 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 82% | 51,953 psi | 85% | 3045 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 51,721 psi | 85% | 3087 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,461 psi | 88% | 3127 fps | 96% |
| Rottweil R 905 | <<locked>> | 98% | 53,635 psi | 88% | 3189 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,621 psi | 90% | 3123 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,040 psi | 87% | 3097 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 53,258 psi | 87% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,317 psi | 89% | 3140 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,243 psi | 87% | 3150 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,404 psi | 89% | 3127 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,968 psi | 87% | 2976 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,663 psi | 86% | 3041 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,156 psi | 87% | 3182 fps | 97.3% |
| Somchem S355 | <<locked>> | 86% | 51,953 psi | 85% | 3087 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 51,692 psi | 85% | 3163 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,317 psi | 89% | 3163 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 52,141 psi | 86% | 3009 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,605 psi | 86% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,127 psi | 87% | 3058 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,042 psi | 90% | 3159 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,980 psi | 82% | 3068 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,099 psi | 89% | 3064 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,215 psi | 89% | 3163 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,462 psi | 89% | 3225 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,665 psi | 90% | 3120 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,852 psi | 87% | 3176 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,845 psi | 72% | 3186 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,462 psi | 89% | 3133 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,607 psi | 90% | 3156 fps | 97.4% |
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 2495 | <<locked>> | 80% | 49,719 psi | 82% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,805 psi | 78% | 2959 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 36,782 psi | 60% | 2808 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,050 psi | 77% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,607 psi | 58% | 2802 fps | 96.9% |
| Accurate High Country | <<locked>> | 96% | 49,255 psi | 81% | 3189 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 44,585 psi | 73% | 2940 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 45,382 psi | 75% | 3028 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,921 psi | 80% | 3163 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,440 psi | 75% | 3028 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,860 psi | 74% | 2963 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,051 psi | 79% | 3038 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,896 psi | 57% | 2815 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,465 psi | 65% | 2953 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,889 psi | 74% | 3018 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,107 psi | 74% | 3068 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,979 psi | 48% | 2657 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,998 psi | 57% | 2844 fps | 95.3% |
| Alliant Reloder-26 | 73.8 gr | 86% | 33,489 psi | 55% | 2851 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 45,208 psi | 74% | 2976 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 45,107 psi | 74% | 3068 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 42,569 psi | 70% | 2890 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,687 psi | 75% | 2982 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 40,292 psi | 66% | 2917 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 43,352 psi | 71% | 2943 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,387 psi | 53% | 2703 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,661 psi | 82% | 3087 fps | 100% |
| Hodgdon Superformance | 74.4 gr | 84% | 42,438 psi | 70% | 2995 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 44% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,821 psi | 83% | 3058 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,876 psi | 77% | 2976 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,197 psi | 81% | 3002 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 43,178 psi | 71% | 2923 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,292 psi | 68% | 2864 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 34,360 psi | 56% | 2756 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 49,298 psi | 81% | 3071 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,430 psi | 84% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,007 psi | 77% | 2972 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,841 psi | 64% | 2808 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 39,566 psi | 65% | 2844 fps | 95.5% |
| Lovex S071 | <<locked>> | 94% | 35,375 psi | 58% | 2776 fps | 95% |
| Norma 201 | <<locked>> | 80% | 51,358 psi | 84% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,456 psi | 78% | 3025 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 46,079 psi | 76% | 3022 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 41,336 psi | 68% | 3018 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 35,520 psi | 58% | 2799 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 47,529 psi | 78% | 3041 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,854 psi | 61% | 2841 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 41,872 psi | 69% | 2972 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 45% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,614 psi | 75% | 2959 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,930 psi | 69% | 3018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,273 psi | 58% | 2818 fps | 96.4% |
| ReloadSwiss RS 70 | 68 gr | 80% | 34,505 psi | 57% | 2818 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 48,921 psi | 80% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,511 psi | 70% | 2917 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 50,082 psi | 82% | 3064 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 43,758 psi | 72% | 2999 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 42,569 psi | 70% | 2890 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,841 psi | 64% | 2808 fps | 96.5% |
| Shooters World Precision | <<locked>> | 80% | 47,007 psi | 77% | 2972 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,566 psi | 65% | 2844 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,671 psi | 72% | 2972 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,082 psi | 84% | 3068 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,961 psi | 72% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,567 psi | 67% | 2805 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,412 psi | 76% | 3054 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 42,917 psi | 70% | 2917 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,937 psi | 52% | 2749 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 41,611 psi | 68% | 2917 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 48,965 psi | 80% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,313 psi | 81% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,973 psi | 67% | 2841 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,927 psi | 61% | 2802 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 43,714 psi | 72% | 2949 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,688 psi | 78% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,463 psi | 60% | 2802 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 29,791 psi | 49% | 2684 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,216 psi | 59% | 2769 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 40,292 psi | 66% | 2917 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,441 psi | 45% | 2687 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,879 psi | 84% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,326 psi | 78% | 3025 fps | 95.7% |
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 83 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Sierra Pro-Hunter. Norma MRP delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,294 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.5 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for .300 Blaser Mag. with the .308 | 150gr | Sierra Pro-Hunter 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.