Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Brenneke TOG bullet and 85 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% | 53,461 psi | 88% | 2940 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 51,750 psi | 85% | 2989 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 52,982 psi | 87% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,693 psi | 88% | 3041 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,635 psi | 88% | 3127 fps | 96% |
| ADI AR 2208 | <<locked>> | 84% | 52,852 psi | 87% | 2963 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,679 psi | 90% | 3084 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 52,301 psi | 86% | 3074 fps | 96.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,737 psi | 90% | 3081 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,751 psi | 88% | 2986 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,896 psi | 88% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,462 psi | 89% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 51,996 psi | 85% | 3068 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,998 psi | 89% | 3071 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,998 psi | 90% | 3133 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,895 psi | 85% | 3058 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,121 psi | 74% | 2982 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 51,982 psi | 85% | 3146 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,401 psi | 83% | 3051 fps | 97.6% |
| Bofors RP3 | <<locked>> | 84% | 54,607 psi | 90% | 3005 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,998 psi | 90% | 3133 fps | 98.5% |
| Bofors RP7 | <<locked>> | 88% | 53,896 psi | 88% | 2986 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 84% | 54,897 psi | 90% | 3022 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,185 psi | 86% | 3035 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 86% | 52,054 psi | 85% | 2992 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 96% | 52,388 psi | 86% | 3015 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,897 psi | 90% | 3058 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,694 psi | 90% | 3018 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,295 psi | 73% | 3018 fps | 96.9% |
| Hodgdon Superformance | <<locked>> | 88% | 52,083 psi | 86% | 3068 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 60% | 1896 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,373 psi | 86% | 2943 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,752 psi | 90% | 2979 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 55,056 psi | 90% | 3022 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,185 psi | 86% | 2959 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 54,157 psi | 89% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,143 psi | 89% | 3009 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,388 psi | 88% | 3107 fps | 97% |
| Lovex S062 | <<locked>> | 82% | 52,765 psi | 87% | 2940 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,359 psi | 86% | 2959 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 53,606 psi | 88% | 3002 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,006 psi | 76% | 2887 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 53,229 psi | 87% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,156 psi | 86% | 3018 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 54,607 psi | 90% | 3159 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 52,417 psi | 86% | 3022 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,896 psi | 88% | 3018 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,896 psi | 88% | 3127 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 54,752 psi | 90% | 3081 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,066 psi | 79% | 2989 fps | 97.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,723 psi | 90% | 3002 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,358 psi | 84% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,577 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 51,996 psi | 85% | 3091 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,222 psi | 73% | 3009 fps | 98% |
| Rottweil R 902 | <<locked>> | 82% | 54,578 psi | 90% | 2953 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,679 psi | 90% | 2999 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,866 psi | 87% | 2995 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 53,200 psi | 87% | 3054 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 53,896 psi | 88% | 2986 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,359 psi | 86% | 2959 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 52,765 psi | 87% | 2940 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,606 psi | 88% | 3002 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,591 psi | 86% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,257 psi | 86% | 2831 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,011 psi | 85% | 2910 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,736 psi | 87% | 3048 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 54,679 psi | 90% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,636 psi | 90% | 2989 fps | 96.4% |
| Somchem S365 | <<locked>> | 92% | 51,837 psi | 85% | 3028 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,882 psi | 88% | 3031 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 54,926 psi | 90% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,114 psi | 90% | 2923 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,460 psi | 86% | 2917 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,491 psi | 89% | 3018 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,345 psi | 88% | 3005 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 53,359 psi | 88% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,548 psi | 88% | 3022 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,549 psi | 90% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,824 psi | 90% | 3150 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,143 psi | 89% | 2982 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,402 psi | 86% | 3038 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,108 psi | 77% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,911 psi | 89% | 3022 fps | 98.1% |
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% | 50,154 psi | 82% | 2884 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,418 psi | 56% | 2638 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 49,792 psi | 82% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,956 psi | 62% | 2743 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 96% | 50,053 psi | 82% | 3064 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 46,818 psi | 77% | 2854 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,959 psi | 69% | 2838 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 48,878 psi | 80% | 3009 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,148 psi | 69% | 2841 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,369 psi | 78% | 2881 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,502 psi | 83% | 2953 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,956 psi | 61% | 2753 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,959 psi | 69% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,684 psi | 68% | 2831 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,119 psi | 69% | 2887 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,180 psi | 45% | 2493 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,808 psi | 54% | 2680 fps | 95.6% |
| Alliant Reloder-26 | 69.2 gr | 82% | 31,053 psi | 51% | 2674 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 41,379 psi | 68% | 2871 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 47,761 psi | 78% | 2894 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,119 psi | 69% | 2887 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,018 psi | 69% | 2759 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 48,124 psi | 79% | 2907 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,001 psi | 66% | 2792 fps | 96.5% |
| Hodgdon H4350 | <<locked>> | 80% | 42,830 psi | 70% | 2815 fps | 95.9% |
| Hodgdon H4831 | <<locked>> | 94% | 48,979 psi | 80% | 2953 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,329 psi | 84% | 2995 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,519 psi | 57% | 2641 fps | 99% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,437 psi | 68% | 2946 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 39,001 psi | 64% | 2802 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 45% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,240 psi | 81% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,547 psi | 85% | 2923 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,623 psi | 62% | 2680 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,410 psi | 71% | 2792 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 36,492 psi | 60% | 2694 fps | 98.1% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,805 psi | 78% | 2894 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 46,601 psi | 77% | 2979 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 49,458 psi | 81% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,959 psi | 67% | 2740 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,233 psi | 64% | 2720 fps | 96.5% |
| Lovex S071 | <<locked>> | 90% | 33,359 psi | 55% | 2612 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 49,864 psi | 82% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,438 psi | 70% | 2828 fps | 95.3% |
| Norma MRP | 72.1 gr | 88% | 38,479 psi | 63% | 2838 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 37,855 psi | 62% | 2740 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 80% | 50,285 psi | 83% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,572 psi | 76% | 2986 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 36,651 psi | 60% | 2720 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 38,609 psi | 63% | 2789 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 46% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,138 psi | 79% | 2887 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,556 psi | 73% | 2940 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,710 psi | 62% | 2759 fps | 98.1% |
| ReloadSwiss RS 70 | 66.9 gr | 80% | 36,593 psi | 60% | 2766 fps | 97.5% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,348 psi | 63% | 2864 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 51,343 psi | 84% | 2900 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,107 psi | 74% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,499 psi | 76% | 2877 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 40,770 psi | 67% | 2815 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 42,018 psi | 69% | 2759 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,959 psi | 67% | 2740 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,458 psi | 81% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,233 psi | 64% | 2720 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,166 psi | 76% | 2894 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,122 psi | 76% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,118 psi | 66% | 2680 fps | 96.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,437 psi | 66% | 2812 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,295 psi | 74% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,039 psi | 84% | 2930 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 34,243 psi | 56% | 2694 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 38,870 psi | 64% | 2740 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 51,532 psi | 85% | 2861 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,851 psi | 85% | 2874 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,294 psi | 71% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,102 psi | 64% | 2733 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 40,872 psi | 67% | 2776 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,038 psi | 82% | 2867 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,638 psi | 63% | 2736 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 29,936 psi | 49% | 2575 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 94% | 47,761 psi | 78% | 3015 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,261 psi | 63% | 2703 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,001 psi | 66% | 2792 fps | 96.5% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,614 psi | 42% | 2523 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,772 psi | 72% | 2841 fps | 95.9% |
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 85 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Brenneke TOG. Norma MRP delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,159 fps. Alliant Reloder-22 gives the best case fill at 100 %, and 85 of the 85 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 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, Alliant Reloder-25 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 .308 | 165gr | Brenneke TOG 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.