Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Woodleigh HS bullet and 82 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% | 53,243 psi | 87% | 3022 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,694 psi | 90% | 3087 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,214 psi | 86% | 3120 fps | 99.1% |
| Accurate 4064 | <<locked>> | 84% | 53,708 psi | 88% | 3081 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,375 psi | 89% | 3186 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 53,882 psi | 88% | 3110 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,779 psi | 85% | 3159 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,765 psi | 87% | 3235 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,534 psi | 90% | 3136 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,723 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,969 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,518 psi | 86% | 3215 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,708 psi | 90% | 3209 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,764 psi | 85% | 3202 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,791 psi | 80% | 3140 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,598 psi | 70% | 3045 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,388 psi | 86% | 3287 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,500 psi | 78% | 3120 fps | 96% |
| Bofors RP3 | <<locked>> | 84% | 51,909 psi | 85% | 3097 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,764 psi | 85% | 3202 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,868 psi | 90% | 3130 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 52,272 psi | 86% | 3110 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 90% | 52,866 psi | 87% | 3176 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 52,852 psi | 87% | 3133 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 51,779 psi | 85% | 3107 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,476 psi | 88% | 3153 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,997 psi | 87% | 3209 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,172 psi | 59% | 1985 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,230 psi | 89% | 3117 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,403 psi | 88% | 3094 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,678 psi | 86% | 3068 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 52,533 psi | 86% | 3107 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,200 psi | 87% | 3104 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 54,810 psi | 90% | 3176 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 52,692 psi | 87% | 3133 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,056 psi | 90% | 3081 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,505 psi | 88% | 3087 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,229 psi | 87% | 3100 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 54,549 psi | 90% | 3146 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,207 psi | 71% | 2953 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 54,810 psi | 90% | 3100 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,027 psi | 89% | 3143 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,040 psi | 87% | 3156 fps | 97% |
| Norma MRP | <<locked>> | 98% | 51,401 psi | 84% | 3232 fps | 98.4% |
| Norma URP | <<locked>> | 92% | 53,127 psi | 87% | 3169 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 54,810 psi | 90% | 3169 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 51,967 psi | 85% | 3163 fps | 99% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,295 psi | 74% | 3048 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 60% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,431 psi | 86% | 3094 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,011 psi | 85% | 3209 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,172 psi | 89% | 3205 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,823 psi | 87% | 3235 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 82% | 52,243 psi | 86% | 3048 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 51,953 psi | 85% | 3091 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,664 psi | 88% | 3133 fps | 96% |
| Rottweil R 905 | <<locked>> | 98% | 53,911 psi | 89% | 3196 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,868 psi | 90% | 3130 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,229 psi | 87% | 3100 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 53,505 psi | 88% | 3087 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,549 psi | 90% | 3146 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,505 psi | 88% | 3153 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,650 psi | 90% | 3130 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,200 psi | 87% | 2979 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,924 psi | 87% | 3045 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,417 psi | 88% | 3189 fps | 97.4% |
| Somchem S355 | <<locked>> | 86% | 52,011 psi | 85% | 3087 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 52,185 psi | 86% | 3173 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,491 psi | 89% | 3166 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 52,446 psi | 86% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,634 psi | 86% | 3022 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,330 psi | 88% | 3064 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 51,779 psi | 85% | 3107 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,357 psi | 83% | 3077 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 84% | 54,375 psi | 89% | 3071 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,433 psi | 89% | 3166 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,723 psi | 90% | 3228 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,056 psi | 90% | 3127 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,084 psi | 87% | 3179 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,208 psi | 73% | 3192 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,723 psi | 90% | 3136 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,795 psi | 90% | 3159 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% | 49,806 psi | 82% | 2969 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,863 psi | 79% | 2963 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 36,999 psi | 61% | 2815 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 47,137 psi | 77% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,694 psi | 59% | 2805 fps | 97% |
| ADI AR 2208 | <<locked>> | 80% | 44,817 psi | 74% | 2943 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 45,585 psi | 75% | 3035 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,139 psi | 81% | 3166 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,121 psi | 74% | 2969 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,138 psi | 79% | 3041 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,085 psi | 58% | 2822 fps | 97% |
| Alliant Reloder-17 | 67.3 gr | 80% | 39,668 psi | 65% | 2959 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,092 psi | 74% | 3025 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,281 psi | 74% | 3074 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,340 psi | 45% | 2602 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,302 psi | 58% | 2854 fps | 95.5% |
| Alliant Reloder-26 | 74.1 gr | 86% | 33,663 psi | 55% | 2858 fps | 95.7% |
| Bofors RP15 | <<locked>> | 98% | 44,454 psi | 73% | 3054 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 45,295 psi | 74% | 2979 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 45,281 psi | 74% | 3074 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 42,641 psi | 70% | 2890 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,730 psi | 75% | 2986 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 40,495 psi | 66% | 2923 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 43,598 psi | 72% | 2949 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,489 psi | 53% | 2707 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,893 psi | 82% | 3094 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,627 psi | 70% | 3002 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 44% | 1778 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,879 psi | 84% | 3061 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,137 psi | 77% | 2982 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,429 psi | 81% | 3009 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 40,727 psi | 67% | 2871 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,495 psi | 68% | 2867 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 34,447 psi | 57% | 2759 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 49,400 psi | 81% | 3074 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,706 psi | 85% | 3028 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,239 psi | 78% | 2979 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,928 psi | 64% | 2812 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 39,639 psi | 65% | 2844 fps | 95.6% |
| Lovex S071 | <<locked>> | 94% | 35,592 psi | 58% | 2779 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,430 psi | 84% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,514 psi | 78% | 3028 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 46,108 psi | 76% | 3025 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 41,698 psi | 68% | 3028 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,607 psi | 58% | 2805 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,805 psi | 78% | 3048 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 37,086 psi | 61% | 2848 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,018 psi | 69% | 2976 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 45% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,847 psi | 75% | 2969 fps | 97.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,177 psi | 69% | 3025 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,476 psi | 58% | 2822 fps | 96.5% |
| ReloadSwiss RS 70 | 68.3 gr | 80% | 34,679 psi | 57% | 2822 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 48,965 psi | 80% | 2995 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,612 psi | 70% | 2917 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 50,299 psi | 83% | 3071 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 43,990 psi | 72% | 3005 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 42,641 psi | 70% | 2890 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,928 psi | 64% | 2812 fps | 96.6% |
| Shooters World Precision | <<locked>> | 80% | 47,239 psi | 78% | 2979 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,639 psi | 65% | 2844 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,700 psi | 72% | 2972 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,126 psi | 84% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,237 psi | 73% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,799 psi | 67% | 2808 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,630 psi | 77% | 3061 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 42,989 psi | 71% | 2920 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 32,169 psi | 53% | 2756 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 41,829 psi | 69% | 2923 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 49,240 psi | 81% | 2963 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,385 psi | 81% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,031 psi | 67% | 2844 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,999 psi | 61% | 2805 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 44,092 psi | 72% | 2956 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 47,761 psi | 78% | 2963 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,535 psi | 60% | 2805 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 30,023 psi | 49% | 2690 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,361 psi | 60% | 2772 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 40,495 psi | 66% | 2923 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,543 psi | 45% | 2694 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,155 psi | 84% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,558 psi | 78% | 3031 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 98 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Woodleigh HS. Alliant Reloder-26 delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,287 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 56–90 %, 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, Accurate MAGPRO, ADI AR 2213 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 | 150gr | Woodleigh HS they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.