Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 159gr | Hasler Bull bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-26.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 51,619 psi | 85% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,606 psi | 88% | 2986 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,488 psi | 83% | 3015 fps | 99.1% |
| Accurate 4064 | <<locked>> | 84% | 52,112 psi | 86% | 2972 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,881 psi | 87% | 3081 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 51,924 psi | 85% | 3166 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 86% | 53,026 psi | 87% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,433 psi | 89% | 3127 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,880 psi | 85% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,360 psi | 89% | 3120 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,592 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,766 psi | 88% | 3058 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,940 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 51,401 psi | 84% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,592 psi | 88% | 3110 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,676 psi | 83% | 3107 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,718 psi | 78% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,495 psi | 68% | 2949 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,897 psi | 90% | 3245 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,296 psi | 76% | 3018 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 54,201 psi | 89% | 3051 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,676 psi | 83% | 3107 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 53,954 psi | 89% | 3031 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 86% | 54,752 psi | 90% | 3071 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 51,735 psi | 85% | 3074 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 88% | 51,851 psi | 85% | 3035 fps | 97.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,737 psi | 90% | 3097 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,070 psi | 89% | 3061 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,402 psi | 86% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 51,938 psi | 85% | 3114 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 59% | 1916 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,505 psi | 88% | 3018 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,388 psi | 86% | 2992 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,100 psi | 90% | 3028 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,795 psi | 90% | 3064 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,373 psi | 86% | 3009 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 53,403 psi | 88% | 3071 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 51,750 psi | 85% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,012 psi | 89% | 3048 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 54,259 psi | 89% | 2986 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,562 psi | 86% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,054 psi | 85% | 3002 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 53,243 psi | 87% | 3045 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,829 psi | 69% | 2854 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 53,737 psi | 88% | 2999 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,418 psi | 89% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,011 psi | 87% | 3041 fps | 100% |
| Norma 204 | <<locked>> | 92% | 51,938 psi | 85% | 3058 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 53,853 psi | 88% | 3199 fps | 99% |
| Norma URP | <<locked>> | 92% | 51,895 psi | 85% | 3064 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,795 psi | 88% | 3071 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,418 psi | 89% | 3127 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,005 psi | 72% | 2949 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 60% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,781 psi | 90% | 3051 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,563 psi | 90% | 3127 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,766 psi | 90% | 3166 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,924 psi | 87% | 3104 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,648 psi | 85% | 3130 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,389 psi | 89% | 3002 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,302 psi | 89% | 3045 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,591 psi | 86% | 3035 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 52,547 psi | 86% | 3091 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 53,954 psi | 89% | 3031 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,054 psi | 85% | 3002 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 52,562 psi | 86% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,243 psi | 87% | 3045 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,431 psi | 86% | 3054 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,592 psi | 88% | 3028 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,694 psi | 90% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,431 psi | 86% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 51,851 psi | 85% | 2949 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,083 psi | 86% | 3084 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 54,389 psi | 89% | 2927 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,244 psi | 89% | 3041 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,621 psi | 90% | 3123 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,258 psi | 87% | 3068 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 84% | 54,665 psi | 90% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 51,779 psi | 85% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,301 psi | 86% | 2966 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,143 psi | 89% | 3064 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,052 psi | 81% | 2976 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 53,316 psi | 88% | 2969 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,127 psi | 87% | 3064 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,185 psi | 87% | 3123 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,331 psi | 89% | 3186 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,027 psi | 89% | 3031 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,967 psi | 85% | 3077 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,975 psi | 71% | 3091 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,722 psi | 88% | 3038 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,635 psi | 88% | 3061 fps | 97.6% |
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% | 48,312 psi | 79% | 2867 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,891 psi | 77% | 2867 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 35,476 psi | 58% | 2713 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 45,759 psi | 75% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,403 psi | 56% | 2707 fps | 97% |
| Accurate High Country | <<locked>> | 96% | 48,269 psi | 79% | 3097 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 43,859 psi | 72% | 2848 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 44,541 psi | 73% | 2936 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,341 psi | 79% | 3071 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,585 psi | 73% | 2936 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,034 psi | 72% | 2871 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,137 psi | 77% | 2943 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,127 psi | 56% | 2723 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,551 psi | 63% | 2858 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,048 psi | 72% | 2927 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,222 psi | 73% | 2979 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,324 psi | 43% | 2510 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,142 psi | 56% | 2756 fps | 95.5% |
| Alliant Reloder-26 | 71.2 gr | 86% | 32,460 psi | 53% | 2759 fps | 95.7% |
| Bofors RP15 | <<locked>> | 98% | 43,366 psi | 71% | 2959 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 44,121 psi | 72% | 2881 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,222 psi | 73% | 2979 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 41,669 psi | 68% | 2795 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 44,759 psi | 73% | 2890 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 39,392 psi | 65% | 2825 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 42,699 psi | 70% | 2854 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,039 psi | 84% | 3031 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,531 psi | 52% | 2612 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,936 psi | 80% | 2995 fps | 100% |
| Hodgdon Superformance | 71.7 gr | 84% | 41,423 psi | 68% | 2900 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 44% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,024 psi | 82% | 2963 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,079 psi | 76% | 2881 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,457 psi | 80% | 2910 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 39,813 psi | 65% | 2776 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,625 psi | 67% | 2776 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 33,301 psi | 55% | 2661 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 48,341 psi | 79% | 2972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,763 psi | 83% | 2992 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 50,995 psi | 84% | 2930 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,267 psi | 76% | 2884 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,971 psi | 62% | 2720 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 38,609 psi | 63% | 2753 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 34,185 psi | 56% | 2680 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,401 psi | 83% | 2946 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,039 psi | 84% | 2946 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,485 psi | 76% | 2930 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,179 psi | 74% | 2930 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 40,553 psi | 67% | 2933 fps | 96% |
| Norma URP | <<locked>> | 80% | 34,708 psi | 57% | 2713 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,934 psi | 77% | 2953 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,013 psi | 59% | 2753 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 40,872 psi | 67% | 2881 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,311 psi | 45% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,875 psi | 74% | 2871 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,850 psi | 83% | 3068 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,046 psi | 67% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,374 psi | 56% | 2726 fps | 96.6% |
| ReloadSwiss RS 70 | 65.7 gr | 80% | 33,823 psi | 56% | 2733 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 47,921 psi | 79% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,510 psi | 68% | 2822 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,298 psi | 81% | 2976 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 42,815 psi | 70% | 2907 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 41,669 psi | 68% | 2795 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,971 psi | 62% | 2720 fps | 96.7% |
| Shooters World Precision | <<locked>> | 80% | 46,267 psi | 76% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,609 psi | 63% | 2753 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,699 psi | 70% | 2877 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,154 psi | 82% | 2972 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,474 psi | 85% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,294 psi | 71% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,202 psi | 61% | 2657 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,409 psi | 70% | 2897 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,140 psi | 84% | 2877 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,989 psi | 69% | 2822 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,082 psi | 51% | 2661 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 40,712 psi | 67% | 2828 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 48,124 psi | 79% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,559 psi | 80% | 2877 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,147 psi | 66% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,027 psi | 59% | 2713 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 42,960 psi | 71% | 2861 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 46,847 psi | 77% | 2867 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,563 psi | 58% | 2713 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 28,689 psi | 47% | 2589 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 98% | 50,676 psi | 83% | 3117 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,418 psi | 58% | 2680 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 39,552 psi | 65% | 2828 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,455 psi | 43% | 2595 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,212 psi | 82% | 2979 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,279 psi | 71% | 2874 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 91 powders for .300 Blaser Mag. loaded with the .308 | 159gr | Hasler Bull. Alliant Reloder-26 delivers the highest muzzle velocity at 3,245 fps; across all powders the maximum-charge window runs from 1,916 fps to 3,245 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 159.0 gr projectile in 0.308" calls for a 1:12.0 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 159gr | Hasler Bull 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.