Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 155gr | Sierra Tipped MatchKing bullet and 87 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 Hodgdon Superformance.
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>> | 82% | 52,518 psi | 86% | 2959 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,867 psi | 88% | 3015 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,140 psi | 84% | 3054 fps | 99% |
| Accurate 4064 | <<locked>> | 84% | 52,837 psi | 87% | 3015 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,258 psi | 87% | 3114 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 52,011 psi | 85% | 3196 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 53,185 psi | 87% | 3045 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,491 psi | 89% | 3156 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,996 psi | 85% | 3166 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,418 psi | 89% | 3150 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,896 psi | 88% | 3071 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,056 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,969 psi | 89% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 51,561 psi | 85% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,650 psi | 88% | 3140 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,792 psi | 83% | 3136 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,906 psi | 79% | 3074 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,814 psi | 69% | 2979 fps | 98% |
| Alliant Reloder-26 | <<locked>> | 98% | 51,126 psi | 84% | 3215 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 54,592 psi | 90% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,792 psi | 83% | 3136 fps | 97% |
| Bofors RP7 | <<locked>> | 90% | 54,230 psi | 89% | 3068 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 86% | 55,071 psi | 90% | 3104 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 52,127 psi | 86% | 3110 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 52,011 psi | 85% | 3064 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,447 psi | 89% | 3097 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,605 psi | 86% | 3087 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,025 psi | 85% | 3140 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 59% | 1939 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,650 psi | 88% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,605 psi | 86% | 3025 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,011 psi | 85% | 3005 fps | 98.4% |
| IMR 4350 | <<locked>> | 94% | 54,897 psi | 90% | 3094 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,504 psi | 86% | 3038 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 53,896 psi | 88% | 3110 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 52,083 psi | 86% | 3068 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,433 psi | 89% | 3015 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,953 psi | 87% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,402 psi | 86% | 3035 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 53,563 psi | 88% | 3074 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,380 psi | 70% | 2890 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 54,172 psi | 89% | 3035 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,723 psi | 90% | 3031 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,345 psi | 88% | 3077 fps | 100% |
| Norma 204 | <<locked>> | 92% | 52,069 psi | 85% | 3087 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 53,954 psi | 89% | 3228 fps | 98.8% |
| Norma URP | <<locked>> | 92% | 52,127 psi | 86% | 3100 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 53,954 psi | 89% | 3100 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,476 psi | 89% | 3153 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,767 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,013 psi | 90% | 3084 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,795 psi | 90% | 3163 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,781 psi | 90% | 3199 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,127 psi | 87% | 3136 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,764 psi | 85% | 3163 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 54,824 psi | 90% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,708 psi | 90% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,692 psi | 87% | 3061 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 98% | 52,692 psi | 87% | 3123 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,230 psi | 89% | 3068 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,402 psi | 86% | 3035 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 52,953 psi | 87% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,563 psi | 88% | 3074 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,649 psi | 86% | 3087 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,795 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,969 psi | 90% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,649 psi | 86% | 2920 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,170 psi | 86% | 2982 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,214 psi | 86% | 3117 fps | 97.3% |
| Somchem S335 | <<locked>> | 82% | 54,752 psi | 90% | 2959 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,607 psi | 90% | 3077 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,737 psi | 90% | 3159 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,490 psi | 88% | 3100 fps | 98.2% |
| Vihtavuori N135 | <<locked>> | 84% | 55,027 psi | 90% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,040 psi | 85% | 2959 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,605 psi | 86% | 2999 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,302 psi | 89% | 3094 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,429 psi | 81% | 3012 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 53,563 psi | 88% | 3005 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,388 psi | 88% | 3097 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,737 psi | 88% | 3159 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,389 psi | 89% | 3212 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,099 psi | 89% | 3061 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,127 psi | 86% | 3110 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,279 psi | 71% | 3127 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,940 psi | 89% | 3071 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,722 psi | 88% | 3091 fps | 97.3% |
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 2495 | <<locked>> | 80% | 49,226 psi | 81% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,268 psi | 78% | 2900 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 36,114 psi | 59% | 2749 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 46,615 psi | 77% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,085 psi | 58% | 2746 fps | 96.9% |
| Accurate High Country | <<locked>> | 96% | 48,486 psi | 80% | 3127 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 44,135 psi | 72% | 2877 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 44,788 psi | 74% | 2966 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,530 psi | 80% | 3104 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,817 psi | 74% | 2966 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,440 psi | 73% | 2907 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,500 psi | 78% | 2976 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,519 psi | 57% | 2759 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,088 psi | 64% | 2897 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,280 psi | 73% | 2959 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,469 psi | 73% | 3009 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,890 psi | 44% | 2546 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,563 psi | 57% | 2789 fps | 95.3% |
| Alliant Reloder-26 | 71.3 gr | 86% | 32,953 psi | 54% | 2795 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 44,657 psi | 73% | 2917 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,469 psi | 73% | 3009 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 42,105 psi | 69% | 2831 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 45,194 psi | 74% | 2927 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 39,740 psi | 65% | 2858 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 42,975 psi | 71% | 2884 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 53% | 2648 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,182 psi | 81% | 3028 fps | 100% |
| Hodgdon Superformance | 71.9 gr | 84% | 41,887 psi | 69% | 2936 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 44% | 1736 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,227 psi | 82% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,412 psi | 76% | 2917 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,704 psi | 80% | 2943 fps | 97.8% |
| IMR 4350 | <<locked>> | 84% | 40,161 psi | 66% | 2808 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,959 psi | 67% | 2808 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,866 psi | 56% | 2700 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 48,733 psi | 80% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,242 psi | 84% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,717 psi | 77% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,464 psi | 63% | 2753 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 39,146 psi | 64% | 2789 fps | 95.6% |
| Lovex S071 | <<locked>> | 94% | 34,838 psi | 57% | 2717 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,894 psi | 84% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,387 psi | 84% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,876 psi | 77% | 2966 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,368 psi | 74% | 2959 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 40,886 psi | 67% | 2966 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 35,172 psi | 58% | 2746 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 47,224 psi | 78% | 2986 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,376 psi | 60% | 2785 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 45% | 1778 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,223 psi | 74% | 2904 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,068 psi | 84% | 3100 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,553 psi | 68% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,867 psi | 57% | 2762 fps | 96.5% |
| ReloadSwiss RS 70 | 65.8 gr | 80% | 34,243 psi | 56% | 2766 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 48,428 psi | 80% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,134 psi | 69% | 2861 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 49,458 psi | 81% | 3005 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 92% | 43,294 psi | 71% | 2940 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 42,105 psi | 69% | 2831 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,464 psi | 63% | 2753 fps | 96.5% |
| Shooters World Precision | <<locked>> | 80% | 46,717 psi | 77% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,146 psi | 64% | 2789 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,047 psi | 71% | 2910 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,430 psi | 83% | 3005 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,822 psi | 85% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,656 psi | 72% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,190 psi | 66% | 2749 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,788 psi | 75% | 2995 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 51,561 psi | 85% | 2913 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,496 psi | 70% | 2858 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 31,604 psi | 52% | 2697 fps | 98.8% |
| Somchem S385 | <<locked>> | 90% | 41,133 psi | 68% | 2861 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 48,573 psi | 80% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,892 psi | 80% | 2910 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,596 psi | 67% | 2785 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,434 psi | 60% | 2743 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 43,250 psi | 71% | 2894 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,210 psi | 78% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,042 psi | 59% | 2746 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 29,312 psi | 48% | 2631 fps | 95.3% |
| Vihtavuori N560 | <<locked>> | 98% | 50,807 psi | 83% | 3146 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,824 psi | 59% | 2713 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 39,929 psi | 66% | 2861 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,050 psi | 44% | 2635 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,488 psi | 83% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,760 psi | 77% | 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 87 powders for .300 Blaser Mag. loaded with the .308 | 155gr | Sierra Tipped MatchKing. Norma MRP delivers the highest muzzle velocity at 3,228 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,228 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 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-26, Hodgdon Superformance rank at the top here: for .300 Blaser Mag. with the .308 | 155gr | Sierra Tipped MatchKing 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.