Load Specifications
Load data in caliber .300 Blaser Mag. with .307 | 165gr | Rhino Solid Shank bullet and 81 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and ReloadSwiss RS 70.
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% | 53,809 psi | 88% | 2946 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 52,257 psi | 86% | 2999 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 53,388 psi | 88% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,288 psi | 89% | 3051 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,302 psi | 89% | 3143 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 53,447 psi | 88% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,114 psi | 90% | 3094 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 52,721 psi | 87% | 3084 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,128 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,273 psi | 89% | 3015 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,824 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,373 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,505 psi | 89% | 3081 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 51,866 psi | 85% | 3081 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,431 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,513 psi | 75% | 2992 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,533 psi | 86% | 3156 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,879 psi | 84% | 3064 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 54,969 psi | 90% | 3012 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 51,866 psi | 85% | 3081 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 54,404 psi | 89% | 2995 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 51,735 psi | 85% | 2969 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,707 psi | 87% | 3045 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 52,373 psi | 86% | 2999 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 96% | 52,895 psi | 87% | 3025 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,793 psi | 85% | 3005 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,880 psi | 85% | 2976 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,672 psi | 73% | 3028 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 88% | 52,576 psi | 86% | 3074 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 60% | 1900 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,765 psi | 87% | 2953 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,141 psi | 86% | 2976 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,692 psi | 87% | 2969 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 54,694 psi | 90% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,578 psi | 90% | 3018 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,882 psi | 88% | 3120 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 53,156 psi | 87% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,939 psi | 87% | 2969 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,128 psi | 89% | 3012 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,499 psi | 76% | 2897 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 53,606 psi | 88% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,649 psi | 86% | 3028 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 51,445 psi | 84% | 3107 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 52,939 psi | 87% | 3035 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,491 psi | 89% | 3028 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,331 psi | 89% | 3136 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 90% | 51,779 psi | 85% | 3031 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,704 psi | 80% | 3002 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 61% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 51,677 psi | 85% | 2953 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,996 psi | 85% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,157 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,431 psi | 86% | 3100 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,759 psi | 73% | 3025 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 54,955 psi | 90% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,056 psi | 90% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,316 psi | 88% | 3005 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 53,737 psi | 88% | 3064 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,404 psi | 89% | 2995 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,939 psi | 87% | 2969 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,156 psi | 87% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,128 psi | 89% | 3012 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,185 psi | 87% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,634 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,272 psi | 86% | 2917 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,272 psi | 87% | 3061 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 55,042 psi | 90% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,027 psi | 90% | 2995 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 52,228 psi | 86% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,375 psi | 89% | 3041 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 52,779 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,027 psi | 90% | 3028 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,795 psi | 88% | 3015 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 53,679 psi | 88% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,099 psi | 89% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 51,547 psi | 85% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,735 psi | 85% | 3094 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,592 psi | 90% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,924 psi | 87% | 3048 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,921 psi | 79% | 3140 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,665 psi | 90% | 3038 fps | 98.3% |
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% | 50,459 psi | 83% | 2890 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 34,708 psi | 57% | 2644 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,212 psi | 82% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,334 psi | 63% | 2753 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 50,560 psi | 83% | 3074 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 47,152 psi | 77% | 2864 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,395 psi | 70% | 2851 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 94% | 46,137 psi | 76% | 2956 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,718 psi | 78% | 2887 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,879 psi | 84% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,304 psi | 61% | 2762 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,322 psi | 69% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,148 psi | 69% | 2844 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,409 psi | 70% | 2897 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,456 psi | 45% | 2507 fps | 96.5% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,185 psi | 54% | 2690 fps | 95.8% |
| Alliant Reloder-26 | 69.8 gr | 82% | 31,444 psi | 52% | 2684 fps | 96% |
| Bofors RP15 | <<locked>> | 94% | 41,829 psi | 69% | 2881 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 48,153 psi | 79% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,409 psi | 70% | 2897 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,351 psi | 70% | 2769 fps | 96.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,472 psi | 80% | 2913 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,321 psi | 66% | 2802 fps | 96.7% |
| Hodgdon H4350 | <<locked>> | 80% | 43,149 psi | 71% | 2822 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 49,429 psi | 81% | 2963 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,385 psi | 79% | 2943 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,882 psi | 57% | 2651 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,829 psi | 69% | 2963 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,262 psi | 64% | 2808 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,195 psi | 45% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,603 psi | 81% | 2900 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,927 psi | 62% | 2690 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,700 psi | 72% | 2799 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,840 psi | 60% | 2700 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,037 psi | 79% | 2900 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 47,050 psi | 77% | 2989 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 49,835 psi | 82% | 2894 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,292 psi | 68% | 2749 fps | 98.1% |
| Lovex S070 | <<locked>> | 80% | 39,421 psi | 65% | 2726 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,663 psi | 55% | 2621 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 50,256 psi | 83% | 2946 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,902 psi | 70% | 2838 fps | 95.4% |
| Norma MRP | 71 gr | 86% | 36,230 psi | 59% | 2782 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,014 psi | 62% | 2743 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,879 psi | 84% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,992 psi | 77% | 2999 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,941 psi | 61% | 2730 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 38,957 psi | 64% | 2799 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,847 psi | 46% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,501 psi | 80% | 2897 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,962 psi | 74% | 2949 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,232 psi | 63% | 2772 fps | 98.3% |
| ReloadSwiss RS 70 | 67.5 gr | 80% | 37,028 psi | 61% | 2779 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,827 psi | 64% | 2877 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,706 psi | 85% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,281 psi | 74% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,789 psi | 77% | 2887 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 88% | 41,089 psi | 67% | 2825 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,351 psi | 70% | 2769 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,292 psi | 68% | 2749 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 49,835 psi | 82% | 2894 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,421 psi | 65% | 2726 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,514 psi | 76% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,485 psi | 76% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,408 psi | 66% | 2690 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,741 psi | 67% | 2818 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,687 psi | 75% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,445 psi | 84% | 2936 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,606 psi | 57% | 2703 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,175 psi | 64% | 2749 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 43,482 psi | 71% | 2766 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,450 psi | 65% | 2743 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 90% | 38,653 psi | 63% | 2726 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,386 psi | 83% | 2874 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,957 psi | 64% | 2746 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,284 psi | 50% | 2585 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 94% | 48,414 psi | 79% | 3031 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,725 psi | 64% | 2713 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,495 psi | 66% | 2805 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,846 psi | 42% | 2533 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,263 psi | 68% | 2789 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 81 powders for .300 Blaser Mag. loaded with the .307 | 165gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,156 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 81 of the 81 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 165.0 gr projectile in 0.307" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Blaser Mag. with the .307 | 165gr | Rhino Solid Shank 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.