Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Norma Kalahari bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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>> | 84% | 54,969 psi | 90% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 52,939 psi | 87% | 3041 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,835 psi | 82% | 3071 fps | 98.6% |
| Accurate 4064 | <<locked>> | 84% | 51,866 psi | 85% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,025 psi | 85% | 3140 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 54,317 psi | 89% | 3123 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,344 psi | 86% | 3074 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 53,330 psi | 88% | 3176 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,534 psi | 90% | 3258 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 52,663 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,069 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 52,852 psi | 87% | 3202 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 53,954 psi | 89% | 3232 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,489 psi | 86% | 3159 fps | 96.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,516 psi | 81% | 3153 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,746 psi | 77% | 3097 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,017 psi | 67% | 2995 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,592 psi | 88% | 3301 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,433 psi | 89% | 3140 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 53,548 psi | 88% | 3117 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,516 psi | 81% | 3153 fps | 96.4% |
| Bofors RP7 | <<locked>> | 90% | 53,069 psi | 87% | 3084 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 86% | 54,056 psi | 89% | 3130 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 54,360 psi | 89% | 3192 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 90% | 54,462 psi | 89% | 3150 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 82% | 54,940 psi | 90% | 3133 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,229 psi | 87% | 3123 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 51,590 psi | 85% | 3117 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,665 psi | 90% | 3228 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 59% | 1969 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,576 psi | 86% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,114 psi | 90% | 3114 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,375 psi | 89% | 3087 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 53,853 psi | 88% | 3117 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,868 psi | 90% | 3120 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 52,678 psi | 86% | 3130 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 54,433 psi | 89% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,737 psi | 90% | 3097 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,447 psi | 88% | 3045 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,100 psi | 90% | 3104 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,665 psi | 90% | 3114 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 52,533 psi | 86% | 3100 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,292 psi | 68% | 2907 fps | 96.8% |
| Norma 201 | <<locked>> | 82% | 53,287 psi | 87% | 3068 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,809 psi | 88% | 3064 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,359 psi | 86% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,578 psi | 90% | 3173 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 52,750 psi | 87% | 3251 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 54,375 psi | 89% | 3182 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 52,823 psi | 87% | 3130 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,258 psi | 87% | 3176 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 60% | 2014 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,041 psi | 89% | 3110 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,650 psi | 88% | 3189 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,563 psi | 88% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 51,837 psi | 85% | 3159 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,375 psi | 89% | 3251 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 53,925 psi | 89% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,403 psi | 88% | 3107 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 51,677 psi | 85% | 3146 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 90% | 53,069 psi | 87% | 3084 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,665 psi | 90% | 3114 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,737 psi | 90% | 3097 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,100 psi | 90% | 3104 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,533 psi | 86% | 3100 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,085 psi | 90% | 3173 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 52,895 psi | 87% | 3091 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,186 psi | 89% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,969 psi | 90% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,563 psi | 90% | 3064 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,723 psi | 90% | 3199 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 53,954 psi | 89% | 2995 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,577 psi | 88% | 3107 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,359 psi | 88% | 3186 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,489 psi | 86% | 3123 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 82% | 54,636 psi | 90% | 2979 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,824 psi | 88% | 3025 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,433 psi | 89% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,027 psi | 90% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,185 psi | 87% | 3120 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,298 psi | 79% | 3031 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 84% | 52,678 psi | 86% | 3035 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,272 psi | 86% | 3123 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,344 psi | 86% | 3182 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,939 psi | 87% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,578 psi | 90% | 3196 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,119 psi | 69% | 3140 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 52,953 psi | 87% | 3100 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,649 psi | 86% | 3114 fps | 96.7% |
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% | 48,080 psi | 79% | 2936 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,456 psi | 76% | 2923 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 37,782 psi | 62% | 2828 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 45,484 psi | 75% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,272 psi | 56% | 2762 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 80% | 51,097 psi | 84% | 3071 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,424 psi | 71% | 2907 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 46,760 psi | 77% | 3048 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,311 psi | 78% | 3123 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,656 psi | 72% | 2933 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,688 psi | 77% | 3005 fps | 99.5% |
| Alliant Reloder-16 | 60.4 gr | 80% | 33,895 psi | 56% | 2779 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,072 psi | 63% | 2913 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,137 psi | 76% | 3038 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,441 psi | 76% | 3091 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,050 psi | 46% | 2621 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,100 psi | 59% | 2867 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,563 psi | 57% | 2874 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,763 psi | 83% | 3077 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,801 psi | 72% | 2943 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,441 psi | 76% | 3091 fps | 95.5% |
| Bofors RP7 | <<locked>> | 84% | 44,048 psi | 72% | 2910 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 44,164 psi | 73% | 2946 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 41,640 psi | 68% | 2940 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 44,875 psi | 74% | 2966 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 51,663 psi | 85% | 3081 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,343 psi | 51% | 2667 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,022 psi | 79% | 3054 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 40,988 psi | 67% | 2953 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,919 psi | 44% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,414 psi | 81% | 3025 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,658 psi | 75% | 2943 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,964 psi | 79% | 2969 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 41,930 psi | 69% | 2887 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,118 psi | 66% | 2828 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 33,127 psi | 54% | 2717 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 47,863 psi | 79% | 3038 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 51,169 psi | 84% | 3045 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,270 psi | 83% | 2992 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 45,759 psi | 75% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,666 psi | 62% | 2772 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 40,886 psi | 67% | 2867 fps | 95.7% |
| Lovex S071 | <<locked>> | 96% | 36,129 psi | 59% | 2785 fps | 95% |
| Norma 201 | <<locked>> | 80% | 49,879 psi | 82% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,546 psi | 83% | 3012 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,035 psi | 76% | 2992 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,587 psi | 78% | 3045 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 39,929 psi | 66% | 2979 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,258 psi | 56% | 2762 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 46,050 psi | 76% | 3009 fps | 99.7% |
| Ramshot Hunter | 67.2 gr | 84% | 38,087 psi | 63% | 2867 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 45% | 1804 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,454 psi | 73% | 2930 fps | 97.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,038 psi | 82% | 3127 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,524 psi | 67% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,011 psi | 56% | 2779 fps | 95.8% |
| ReloadSwiss RS 70 | 67.7 gr | 82% | 35,853 psi | 59% | 2848 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 47,630 psi | 78% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,089 psi | 67% | 2877 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 94% | 45,136 psi | 74% | 3018 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 84% | 44,048 psi | 72% | 2910 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,666 psi | 62% | 2772 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,169 psi | 84% | 3045 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,759 psi | 75% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,886 psi | 67% | 2867 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,177 psi | 69% | 2933 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,574 psi | 81% | 3035 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,850 psi | 83% | 2946 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,801 psi | 70% | 2802 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,494 psi | 65% | 2772 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,715 psi | 73% | 3012 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 50,560 psi | 83% | 2943 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,553 psi | 68% | 2881 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,763 psi | 51% | 2710 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 43,004 psi | 71% | 2940 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 51,343 psi | 84% | 2930 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,500 psi | 78% | 2927 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,863 psi | 79% | 2940 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,697 psi | 65% | 2808 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,679 psi | 59% | 2766 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 45,034 psi | 74% | 2966 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 46,238 psi | 76% | 2930 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,157 psi | 58% | 2762 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 30,574 psi | 50% | 2703 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,114 psi | 58% | 2736 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 41,829 psi | 69% | 2946 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,239 psi | 46% | 2710 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,559 psi | 81% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,672 psi | 75% | 2982 fps | 95% |
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 105 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Norma Kalahari. Alliant Reloder-26 delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,301 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:12.5 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. Alliant Reloder-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for .300 Blaser Mag. with the .308 | 150gr | Norma Kalahari they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 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.