Load Specifications
Load data in caliber .300 Blaser Mag. with .307 | 150gr | Rhino Penetrator bullet and 90 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 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.
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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% | 51,488 psi | 85% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,098 psi | 87% | 3048 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,937 psi | 82% | 3074 fps | 98.6% |
| Accurate 4064 | <<locked>> | 84% | 52,011 psi | 85% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,199 psi | 86% | 3143 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 54,708 psi | 90% | 3284 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,505 psi | 89% | 3130 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,475 psi | 86% | 3077 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 53,447 psi | 88% | 3179 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,708 psi | 90% | 3261 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,577 psi | 88% | 3176 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 52,837 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,258 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,011 psi | 87% | 3205 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,346 psi | 89% | 3238 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,823 psi | 87% | 3166 fps | 97% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,690 psi | 82% | 3156 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,862 psi | 77% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,104 psi | 67% | 2999 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,766 psi | 88% | 3304 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,592 psi | 90% | 3143 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 53,737 psi | 88% | 3120 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,690 psi | 82% | 3156 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 53,229 psi | 87% | 3091 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 54,201 psi | 89% | 3133 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 54,723 psi | 90% | 3199 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 54,621 psi | 90% | 3153 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,388 psi | 88% | 3127 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 51,779 psi | 85% | 3120 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,984 psi | 90% | 3235 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 59% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,765 psi | 87% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 51,953 psi | 85% | 3061 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,549 psi | 90% | 3091 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 53,983 psi | 89% | 3123 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,013 psi | 90% | 3127 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 52,866 psi | 87% | 3136 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 54,636 psi | 90% | 3156 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,940 psi | 90% | 3100 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,635 psi | 88% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,011 psi | 85% | 3054 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,810 psi | 90% | 3120 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 52,692 psi | 87% | 3104 fps | 98.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,452 psi | 68% | 2910 fps | 96.8% |
| Norma 201 | <<locked>> | 82% | 53,258 psi | 87% | 3068 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,012 psi | 89% | 3068 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,562 psi | 86% | 3110 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,694 psi | 90% | 3176 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 52,881 psi | 87% | 3251 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 54,534 psi | 90% | 3186 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 52,997 psi | 87% | 3130 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,447 psi | 88% | 3182 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 60% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,186 psi | 89% | 3110 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,853 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,722 psi | 88% | 3232 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,054 psi | 85% | 3163 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,491 psi | 89% | 3255 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 53,896 psi | 88% | 3068 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,592 psi | 88% | 3110 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 51,866 psi | 85% | 3150 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 90% | 53,229 psi | 87% | 3091 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,810 psi | 90% | 3120 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,940 psi | 90% | 3100 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 52,011 psi | 85% | 3054 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,692 psi | 87% | 3104 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 51,721 psi | 85% | 3117 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,040 psi | 87% | 3094 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,375 psi | 89% | 3002 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 51,764 psi | 85% | 2949 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,708 psi | 90% | 3064 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,839 psi | 90% | 3205 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 53,867 psi | 88% | 2995 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,766 psi | 88% | 3110 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,548 psi | 88% | 3189 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,591 psi | 86% | 3127 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 82% | 54,853 psi | 90% | 2982 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,056 psi | 89% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,636 psi | 90% | 3045 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 51,590 psi | 85% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,330 psi | 88% | 3123 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,399 psi | 79% | 3035 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 84% | 52,808 psi | 87% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,402 psi | 86% | 3127 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,489 psi | 86% | 3186 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,040 psi | 87% | 3091 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,723 psi | 90% | 3199 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,264 psi | 69% | 3143 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,127 psi | 87% | 3104 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,779 psi | 87% | 3117 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 2495 | <<locked>> | 80% | 48,254 psi | 79% | 2940 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,586 psi | 76% | 2927 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 37,927 psi | 62% | 2831 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 45,687 psi | 75% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,432 psi | 57% | 2769 fps | 96.3% |
| Accurate High Country | <<locked>> | 98% | 50,995 psi | 84% | 3219 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 51,300 psi | 84% | 3074 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,424 psi | 71% | 2907 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 46,876 psi | 77% | 3051 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,485 psi | 78% | 3127 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,862 psi | 77% | 3051 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,816 psi | 72% | 2936 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,833 psi | 77% | 3009 fps | 99.6% |
| Alliant Reloder-16 | 60.5 gr | 80% | 33,852 psi | 56% | 2779 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,232 psi | 63% | 2917 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,253 psi | 76% | 3041 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,615 psi | 77% | 3094 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,152 psi | 46% | 2625 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,201 psi | 59% | 2871 fps | 95.6% |
| Alliant Reloder-26 | 73.5 gr | 88% | 34,664 psi | 57% | 2881 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,923 psi | 84% | 3081 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,787 psi | 72% | 2943 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,615 psi | 77% | 3094 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 41,350 psi | 68% | 2854 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 44,353 psi | 73% | 2949 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 41,800 psi | 69% | 2946 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 84% | 45,034 psi | 74% | 2969 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,372 psi | 52% | 2667 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,211 psi | 79% | 3058 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,133 psi | 68% | 2956 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 44% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,603 psi | 81% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,629 psi | 75% | 2943 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,138 psi | 79% | 2972 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 42,047 psi | 69% | 2890 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,263 psi | 66% | 2828 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 33,272 psi | 55% | 2720 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 48,037 psi | 79% | 3041 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,343 psi | 84% | 3048 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,473 psi | 83% | 2995 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,919 psi | 75% | 2946 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,811 psi | 62% | 2776 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 41,002 psi | 67% | 2871 fps | 95.8% |
| Lovex S071 | <<locked>> | 96% | 36,260 psi | 60% | 2792 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,096 psi | 82% | 3012 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,749 psi | 83% | 3018 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,209 psi | 76% | 2992 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 47,718 psi | 78% | 3048 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 40,030 psi | 66% | 2979 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,432 psi | 57% | 2769 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,224 psi | 76% | 3012 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 38,232 psi | 63% | 2871 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 45% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,570 psi | 73% | 2933 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,256 psi | 83% | 3130 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,640 psi | 67% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,040 psi | 56% | 2779 fps | 95.8% |
| ReloadSwiss RS 70 | 67.9 gr | 82% | 35,984 psi | 59% | 2851 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 47,616 psi | 78% | 2959 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,263 psi | 68% | 2884 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 94% | 45,281 psi | 74% | 3022 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 41,350 psi | 68% | 2854 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,811 psi | 62% | 2776 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,343 psi | 84% | 3048 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,919 psi | 75% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 41,002 psi | 67% | 2871 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,351 psi | 70% | 2940 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,705 psi | 82% | 3038 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,053 psi | 84% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,960 psi | 71% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,639 psi | 65% | 2776 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,846 psi | 74% | 3015 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 50,734 psi | 83% | 2946 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,698 psi | 68% | 2884 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,893 psi | 51% | 2713 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 43,163 psi | 71% | 2943 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 51,517 psi | 85% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,718 psi | 78% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,051 psi | 79% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,827 psi | 65% | 2812 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,824 psi | 59% | 2769 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 45,353 psi | 74% | 2976 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,383 psi | 76% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,317 psi | 58% | 2766 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 30,719 psi | 50% | 2710 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,244 psi | 58% | 2740 fps | 98.6% |
| Winchester 760 | <<locked>> | 84% | 41,800 psi | 69% | 2946 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,326 psi | 47% | 2717 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,530 psi | 81% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,774 psi | 75% | 2986 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 90 powders for .300 Blaser Mag. loaded with the .307 | 150gr | Rhino Penetrator. Alliant Reloder-26 delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,304 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 0.307" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .307 | 150gr | Rhino Penetrator 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.