Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Impala LW CFN bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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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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 2700 | <<locked>> | 82% | 52,924 psi | 87% | 3028 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,534 psi | 90% | 3136 fps | 99.2% |
| Accurate 4064 | <<locked>> | 82% | 53,403 psi | 88% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,968 psi | 87% | 3136 fps | 99.8% |
| Accurate High Country | <<locked>> | 98% | 54,853 psi | 90% | 3274 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 52,069 psi | 85% | 3058 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 96% | 53,301 psi | 88% | 3163 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,360 psi | 89% | 3238 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,388 psi | 88% | 3159 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,098 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,258 psi | 87% | 3107 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,924 psi | 87% | 3189 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,998 psi | 89% | 3219 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,736 psi | 87% | 3150 fps | 96.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,505 psi | 88% | 3212 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,589 psi | 83% | 3153 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,483 psi | 73% | 3061 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,186 psi | 89% | 3297 fps | 99.9% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,298 psi | 81% | 3133 fps | 96.2% |
| Bofors RP3 | <<locked>> | 84% | 54,230 psi | 89% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,505 psi | 88% | 3212 fps | 97.3% |
| Bofors RP7 | <<locked>> | 88% | 53,388 psi | 88% | 3077 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 84% | 54,360 psi | 89% | 3120 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 54,636 psi | 90% | 3182 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 54,259 psi | 89% | 3133 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,577 psi | 88% | 3114 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,897 psi | 90% | 3156 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,404 psi | 89% | 3212 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 60% | 1975 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,810 psi | 90% | 3094 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,969 psi | 89% | 3068 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 53,867 psi | 88% | 3107 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,650 psi | 90% | 3104 fps | 98.5% |
| IMR 4831 | <<locked>> | 92% | 53,243 psi | 87% | 3127 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 54,621 psi | 90% | 3140 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 52,460 psi | 86% | 3045 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,085 psi | 90% | 3107 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 53,185 psi | 87% | 3094 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,832 psi | 75% | 2982 fps | 97.9% |
| Norma 203B | <<locked>> | 82% | 52,663 psi | 86% | 3094 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,389 psi | 89% | 3156 fps | 97% |
| Norma MRP | <<locked>> | 98% | 53,098 psi | 87% | 3241 fps | 98.5% |
| Norma URP | <<locked>> | 92% | 54,723 psi | 90% | 3173 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 52,997 psi | 87% | 3117 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 53,403 psi | 88% | 3166 fps | 99.1% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,108 psi | 77% | 3061 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 61% | 2021 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,070 psi | 89% | 3094 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,563 psi | 88% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,460 psi | 86% | 3156 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,317 psi | 89% | 3238 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,613 psi | 72% | 3074 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 82% | 54,346 psi | 89% | 3058 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,288 psi | 89% | 3104 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,940 psi | 90% | 3130 fps | 96% |
| Rottweil R 905 | <<locked>> | 96% | 51,953 psi | 85% | 3136 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 88% | 53,388 psi | 88% | 3077 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,085 psi | 90% | 3107 fps | 99.4% |
| Shooters World Precision | <<locked>> | 82% | 52,460 psi | 86% | 3045 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,185 psi | 87% | 3094 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,085 psi | 90% | 3156 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,795 psi | 90% | 2979 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,824 psi | 90% | 3051 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,955 psi | 90% | 3192 fps | 97.5% |
| Somchem S355 | <<locked>> | 86% | 54,186 psi | 89% | 3100 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,795 psi | 88% | 3176 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,982 psi | 87% | 3117 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 82% | 54,331 psi | 89% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,389 psi | 89% | 3025 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,114 psi | 90% | 3068 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,272 psi | 87% | 3107 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,909 psi | 85% | 3081 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 82% | 52,852 psi | 87% | 3022 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,852 psi | 87% | 3120 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 98% | 53,519 psi | 88% | 3186 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,881 psi | 87% | 3074 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,636 psi | 90% | 3182 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,064 psi | 76% | 3212 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,605 psi | 86% | 3100 fps | 96.8% |
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% | 49,777 psi | 82% | 2969 fps | 97% |
| Accurate 3100 | <<locked>> | 88% | 37,246 psi | 61% | 2792 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 50,343 psi | 83% | 2999 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,348 psi | 63% | 2844 fps | 97.6% |
| Accurate High Country | <<locked>> | 96% | 51,155 psi | 84% | 3209 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 46,296 psi | 76% | 2946 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 47,108 psi | 77% | 3038 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,647 psi | 83% | 3173 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 47,181 psi | 77% | 3041 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,065 psi | 77% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,009 psi | 82% | 3048 fps | 99.8% |
| Alliant Reloder-16 | 60.6 gr | 80% | 36,840 psi | 60% | 2841 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,553 psi | 68% | 2979 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,630 psi | 77% | 3035 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,065 psi | 77% | 3087 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,920 psi | 46% | 2592 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 35,143 psi | 58% | 2822 fps | 95% |
| Alliant Reloder-26 | 70.3 gr | 84% | 33,779 psi | 55% | 2835 fps | 95.5% |
| Bofors RP15 | <<locked>> | 98% | 46,224 psi | 76% | 3071 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,732 psi | 78% | 2995 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 47,065 psi | 77% | 3087 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,061 psi | 69% | 2851 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 47,892 psi | 79% | 3002 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 39,755 psi | 65% | 2877 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 82% | 45,179 psi | 74% | 2956 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,592 psi | 57% | 2733 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,503 psi | 85% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 41,336 psi | 68% | 2946 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 45% | 1768 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,704 psi | 80% | 2986 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,966 psi | 84% | 3012 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 42,366 psi | 70% | 2881 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,062 psi | 71% | 2877 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 36,738 psi | 60% | 2789 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 51,300 psi | 84% | 3081 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,458 psi | 81% | 2992 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,162 psi | 68% | 2835 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 39,523 psi | 65% | 2815 fps | 95.3% |
| Lovex S071 | <<locked>> | 92% | 36,071 psi | 59% | 2766 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 49,472 psi | 81% | 3038 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,790 psi | 78% | 3035 fps | 95.5% |
| Norma MRP | 73.1 gr | 90% | 40,886 psi | 67% | 2986 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 37,797 psi | 62% | 2831 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 80% | 49,516 psi | 81% | 3054 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 36,637 psi | 60% | 2812 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 43,990 psi | 72% | 2995 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,065 psi | 46% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,834 psi | 79% | 2979 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,961 psi | 72% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,724 psi | 62% | 2854 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,651 psi | 60% | 2851 fps | 96.2% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,915 psi | 67% | 3005 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,285 psi | 84% | 3005 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,208 psi | 74% | 2943 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 51,735 psi | 85% | 3071 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 45,745 psi | 75% | 3015 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,061 psi | 69% | 2851 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,162 psi | 68% | 2835 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 49,458 psi | 81% | 2992 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,523 psi | 65% | 2815 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,600 psi | 75% | 2989 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,934 psi | 75% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,393 psi | 66% | 2772 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,324 psi | 74% | 3009 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,266 psi | 74% | 2936 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 34,374 psi | 56% | 2792 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 41,350 psi | 68% | 2887 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 51,314 psi | 84% | 2969 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,256 psi | 84% | 2976 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,221 psi | 71% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,972 psi | 64% | 2825 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 42,946 psi | 71% | 2910 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,647 psi | 82% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,725 psi | 64% | 2831 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 80% | 30,545 psi | 50% | 2677 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,232 psi | 63% | 2792 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,755 psi | 65% | 2877 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 28,181 psi | 46% | 2687 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,108 psi | 76% | 2979 fps | 95.1% |
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 79 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Impala LW CFN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,297 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,297 fps. Accurate 3100 gives the best case fill at 100 %, and 79 of the 79 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 150.0 gr projectile in 0.308" calls for a 1:13.0 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, Alliant Reloder-16, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 150gr | Impala LW CFN 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.