Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 155gr | Brenneke TAG bullet and 89 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-16 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.
A valid access license is required to use the Personalized Load Calculator.
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% | 55,056 psi | 90% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,388 psi | 88% | 3022 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,372 psi | 83% | 3048 fps | 99% |
| Accurate 4064 | <<locked>> | 84% | 51,996 psi | 85% | 3012 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,504 psi | 86% | 3114 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 54,897 psi | 90% | 3097 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,924 psi | 87% | 3051 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,157 psi | 89% | 3159 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,634 psi | 85% | 3169 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,099 psi | 89% | 3153 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,200 psi | 87% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,606 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,809 psi | 88% | 3182 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,027 psi | 90% | 3209 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,301 psi | 88% | 3143 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,328 psi | 83% | 3136 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,423 psi | 68% | 2979 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3284 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,013 psi | 90% | 3117 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 53,969 psi | 89% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,328 psi | 83% | 3136 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 53,737 psi | 88% | 3068 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 54,505 psi | 89% | 3104 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 51,634 psi | 85% | 3110 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 51,851 psi | 85% | 3071 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,940 psi | 89% | 3097 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,228 psi | 86% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 51,619 psi | 85% | 3143 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 59% | 1942 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,200 psi | 87% | 3054 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,344 psi | 86% | 3031 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,969 psi | 90% | 3064 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 54,621 psi | 90% | 3100 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,185 psi | 86% | 3041 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 53,229 psi | 87% | 3107 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 55,027 psi | 90% | 3127 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,012 psi | 89% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,243 psi | 86% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 51,822 psi | 85% | 3035 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 53,185 psi | 87% | 3081 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,481 psi | 68% | 2881 fps | 97.3% |
| Norma 201 | <<locked>> | 82% | 53,461 psi | 88% | 3035 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,346 psi | 89% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,895 psi | 87% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 92% | 51,750 psi | 85% | 3091 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 53,635 psi | 88% | 3232 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 51,808 psi | 85% | 3104 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 53,708 psi | 88% | 3107 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,157 psi | 89% | 3159 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 60% | 1991 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,549 psi | 90% | 3087 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,389 psi | 89% | 3166 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,592 psi | 90% | 3202 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,663 psi | 86% | 3140 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,372 psi | 84% | 3166 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 54,114 psi | 89% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,070 psi | 89% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,417 psi | 86% | 3068 fps | 96% |
| Rottweil R 905 | <<locked>> | 98% | 52,330 psi | 86% | 3123 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 53,737 psi | 88% | 3068 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 51,822 psi | 85% | 3035 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 52,243 psi | 86% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,185 psi | 87% | 3081 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,156 psi | 86% | 3087 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,461 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,520 psi | 90% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,170 psi | 86% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 51,605 psi | 85% | 2982 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,866 psi | 85% | 3117 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 54,143 psi | 89% | 2963 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,070 psi | 89% | 3077 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,375 psi | 89% | 3163 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,156 psi | 87% | 3104 fps | 98.3% |
| Vihtavuori N133 | <<locked>> | 82% | 55,042 psi | 90% | 2949 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,389 psi | 89% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,042 psi | 90% | 3012 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,098 psi | 86% | 3002 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,824 psi | 88% | 3097 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,979 psi | 80% | 3012 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 53,113 psi | 87% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,982 psi | 87% | 3100 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,142 psi | 87% | 3159 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,128 psi | 89% | 3219 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,722 psi | 88% | 3064 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,851 psi | 85% | 3114 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,627 psi | 70% | 3120 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,534 psi | 88% | 3074 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,461 psi | 88% | 3094 fps | 97.4% |
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% | 48,095 psi | 79% | 2904 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,804 psi | 77% | 2900 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 35,404 psi | 58% | 2743 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 45,542 psi | 75% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,345 psi | 56% | 2740 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 51,590 psi | 85% | 3045 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,700 psi | 72% | 2881 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 44,266 psi | 73% | 2966 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,979 psi | 79% | 3100 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,295 psi | 73% | 2966 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,830 psi | 72% | 2904 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,079 psi | 77% | 2979 fps | 99.7% |
| Alliant Reloder-16 | 60.9 gr | 80% | 33,968 psi | 56% | 2753 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,435 psi | 63% | 2890 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,758 psi | 72% | 2959 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,990 psi | 72% | 3009 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,021 psi | 46% | 2595 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,026 psi | 56% | 2785 fps | 95.2% |
| Alliant Reloder-26 | 72.3 gr | 86% | 32,343 psi | 53% | 2785 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,329 psi | 84% | 3054 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 43,859 psi | 72% | 2910 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 43,990 psi | 72% | 3009 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 41,452 psi | 68% | 2828 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 44,498 psi | 73% | 2920 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 39,262 psi | 64% | 2854 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 42,409 psi | 70% | 2884 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,386 psi | 52% | 2641 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,617 psi | 80% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,321 psi | 68% | 2933 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 44% | 1742 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,777 psi | 82% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,905 psi | 75% | 2917 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,399 psi | 79% | 2949 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 42,308 psi | 69% | 2867 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,451 psi | 66% | 2805 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 33,127 psi | 54% | 2690 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 48,341 psi | 79% | 3012 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,821 psi | 83% | 2966 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,093 psi | 76% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,811 psi | 62% | 2749 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 38,377 psi | 63% | 2779 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 36,376 psi | 60% | 2766 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,198 psi | 82% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,821 psi | 83% | 2982 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,441 psi | 76% | 2966 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,092 psi | 74% | 2963 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 40,350 psi | 66% | 2959 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,505 psi | 57% | 2740 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 46,557 psi | 76% | 2982 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 35,868 psi | 59% | 2782 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 45% | 1781 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,802 psi | 74% | 2904 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,734 psi | 83% | 3104 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,930 psi | 67% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,098 psi | 56% | 2753 fps | 96.3% |
| ReloadSwiss RS 70 | 66.6 gr | 80% | 33,547 psi | 55% | 2756 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 47,718 psi | 78% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,336 psi | 68% | 2854 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,168 psi | 81% | 3009 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 42,714 psi | 70% | 2936 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 41,452 psi | 68% | 2828 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,811 psi | 62% | 2749 fps | 96.4% |
| Shooters World Precision | <<locked>> | 80% | 46,093 psi | 76% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,377 psi | 63% | 2779 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,612 psi | 70% | 2910 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,067 psi | 82% | 3009 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,358 psi | 84% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,192 psi | 71% | 2776 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,639 psi | 65% | 2746 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,208 psi | 74% | 2992 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 50,952 psi | 84% | 2913 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,800 psi | 69% | 2854 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 30,879 psi | 51% | 2687 fps | 98.6% |
| Somchem S385 | <<locked>> | 90% | 40,437 psi | 66% | 2858 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 51,924 psi | 85% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,993 psi | 79% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,327 psi | 79% | 2910 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,929 psi | 66% | 2782 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 35,969 psi | 59% | 2743 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 42,757 psi | 70% | 2894 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 46,601 psi | 77% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,346 psi | 58% | 2740 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 84% | 30,676 psi | 50% | 2677 fps | 96% |
| Vihtavuori N560 | <<locked>> | 98% | 50,546 psi | 83% | 3150 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,302 psi | 58% | 2713 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 39,436 psi | 65% | 2861 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,295 psi | 43% | 2615 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,067 psi | 82% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,296 psi | 76% | 2966 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 89 powders for .300 Blaser Mag. loaded with the .308 | 155gr | Brenneke TAG. Alliant Reloder-26 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,284 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 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 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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-16, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 155gr | Brenneke TAG 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.