Load Specifications
Load data in caliber .300 Blaser Mag. with .307 | 165gr | Rhino Penetrator bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-17.
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% | 53,664 psi | 88% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,984 psi | 90% | 2949 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,388 psi | 86% | 2986 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,114 psi | 89% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,694 psi | 90% | 3045 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,360 psi | 89% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,156 psi | 86% | 3028 fps | 97.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,316 psi | 88% | 3074 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,287 psi | 87% | 3094 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,955 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 51,895 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 51,967 psi | 85% | 3048 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,881 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,911 psi | 90% | 3074 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,040 psi | 85% | 3071 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,197 psi | 81% | 3009 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,888 psi | 70% | 2923 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,692 psi | 87% | 3150 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,776 psi | 78% | 2992 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 52,373 psi | 86% | 2959 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,040 psi | 85% | 3071 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 52,025 psi | 85% | 2940 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 52,823 psi | 87% | 2972 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,388 psi | 88% | 3041 fps | 99% |
| Hodgdon H4350 | <<locked>> | 88% | 53,200 psi | 87% | 2999 fps | 98% |
| Hodgdon H4831 | <<locked>> | 98% | 53,519 psi | 88% | 3018 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,199 psi | 86% | 2969 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,780 psi | 88% | 3009 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,388 psi | 88% | 3077 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 60% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,752 psi | 90% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,751 psi | 88% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,011 psi | 87% | 2930 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 52,692 psi | 87% | 2969 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,577 psi | 88% | 2969 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 54,984 psi | 90% | 3031 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,243 psi | 87% | 2992 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,937 psi | 84% | 3045 fps | 96% |
| Lovex S062 | <<locked>> | 84% | 54,085 psi | 89% | 2949 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,534 psi | 88% | 2963 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 54,694 psi | 90% | 3005 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,453 psi | 71% | 2828 fps | 98.1% |
| Norma 203B | <<locked>> | 84% | 54,592 psi | 90% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,388 psi | 88% | 3025 fps | 97.6% |
| Norma MRP | <<locked>> | 98% | 51,605 psi | 85% | 3097 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 53,316 psi | 88% | 3028 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,663 psi | 85% | 2972 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,908 psi | 84% | 3054 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 52,315 psi | 86% | 3028 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,484 psi | 75% | 2923 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 61% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,649 psi | 86% | 2953 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,591 psi | 86% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,491 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,026 psi | 87% | 3094 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,974 psi | 69% | 2940 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 52,707 psi | 87% | 2910 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,446 psi | 86% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,940 psi | 89% | 2995 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 98% | 54,230 psi | 89% | 3061 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 52,025 psi | 85% | 2940 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,534 psi | 88% | 2963 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,085 psi | 89% | 2949 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,694 psi | 90% | 3005 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,896 psi | 88% | 3015 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,042 psi | 90% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,708 psi | 88% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,142 psi | 87% | 2910 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,751 psi | 88% | 3054 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 52,562 psi | 86% | 2949 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 52,460 psi | 86% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,795 psi | 90% | 3031 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 52,823 psi | 87% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,098 psi | 87% | 2884 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,766 psi | 88% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,098 psi | 86% | 2969 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,575 psi | 83% | 2946 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 54,882 psi | 90% | 2930 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,679 psi | 90% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 51,663 psi | 85% | 3035 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,025 psi | 85% | 3084 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 51,706 psi | 85% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,388 psi | 88% | 3041 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,469 psi | 73% | 3064 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,085 psi | 90% | 2995 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,984 psi | 90% | 3025 fps | 98% |
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% | 50,459 psi | 83% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,283 psi | 79% | 2831 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 34,824 psi | 57% | 2641 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 47,790 psi | 78% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,230 psi | 59% | 2694 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 45,136 psi | 74% | 2812 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 42,873 psi | 70% | 2844 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 49,879 psi | 82% | 3012 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,661 psi | 82% | 3031 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,556 psi | 75% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,689 psi | 80% | 2907 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,418 psi | 58% | 2703 fps | 97.9% |
| Alliant Reloder-17 | 63.2 gr | 80% | 40,001 psi | 66% | 2831 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,496 psi | 70% | 2838 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,714 psi | 70% | 2890 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,976 psi | 43% | 2444 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,286 psi | 55% | 2680 fps | 95.4% |
| Alliant Reloder-26 | 68 gr | 84% | 31,604 psi | 52% | 2680 fps | 95.7% |
| Bofors RP15 | <<locked>> | 96% | 41,930 psi | 69% | 2871 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 45,759 psi | 75% | 2848 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,714 psi | 70% | 2890 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,306 psi | 66% | 2707 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,238 psi | 76% | 2858 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,087 psi | 63% | 2736 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,089 psi | 67% | 2762 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 96% | 50,096 psi | 82% | 2959 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,895 psi | 54% | 2592 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,212 psi | 82% | 2953 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,914 psi | 66% | 2812 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 44% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,401 psi | 84% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,427 psi | 78% | 2844 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,806 psi | 82% | 2874 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 38,421 psi | 63% | 2687 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,727 psi | 69% | 2743 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 34,867 psi | 57% | 2644 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 49,966 psi | 82% | 2936 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 47,442 psi | 78% | 2976 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 47,601 psi | 78% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,407 psi | 65% | 2694 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,550 psi | 62% | 2671 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 33,591 psi | 55% | 2612 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 48,066 psi | 79% | 2894 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,468 psi | 71% | 2838 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 39,073 psi | 64% | 2838 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 36,027 psi | 59% | 2687 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 48,240 psi | 79% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,529 psi | 78% | 2989 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 34,896 psi | 57% | 2667 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,264 psi | 69% | 2858 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,572 psi | 45% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,282 psi | 76% | 2838 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,496 psi | 70% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,795 psi | 59% | 2703 fps | 97.4% |
| ReloadSwiss RS 70 | 64.2 gr | 80% | 35,041 psi | 58% | 2713 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,030 psi | 64% | 2864 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 49,458 psi | 81% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,062 psi | 71% | 2789 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,413 psi | 78% | 2881 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 41,524 psi | 68% | 2822 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 40,306 psi | 66% | 2707 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,407 psi | 65% | 2694 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 47,601 psi | 78% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,550 psi | 62% | 2671 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,135 psi | 72% | 2844 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,517 psi | 85% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,541 psi | 73% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,522 psi | 63% | 2631 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,990 psi | 72% | 2874 fps | 95.9% |
| Somchem S355 | <<locked>> | 80% | 43,569 psi | 72% | 2792 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,445 psi | 53% | 2641 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 39,494 psi | 65% | 2746 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 49,647 psi | 82% | 2818 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,821 psi | 82% | 2835 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,481 psi | 68% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,492 psi | 62% | 2687 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,437 psi | 68% | 2776 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 48,211 psi | 79% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,956 psi | 61% | 2687 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 28,340 psi | 47% | 2523 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 48,733 psi | 80% | 3022 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,608 psi | 60% | 2654 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 38,232 psi | 63% | 2743 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,991 psi | 43% | 2530 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,503 psi | 85% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 44,599 psi | 73% | 2844 fps | 95.7% |
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 86 powders for .300 Blaser Mag. loaded with the .307 | 165gr | Rhino Penetrator. Alliant Reloder-26 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,150 fps. Accurate 3100 gives the best case fill at 100 %, and 86 of the 86 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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. ReloadSwiss RS 70, Alliant Reloder-26, Alliant Reloder-17 rank at the top here: for .300 Blaser Mag. with the .307 | 165gr | 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.