Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Speer Deep Curl Soft Point bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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% | 53,853 psi | 88% | 2946 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 52,112 psi | 86% | 2992 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 53,171 psi | 87% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,085 psi | 89% | 3048 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,113 psi | 87% | 3136 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 98% | 54,186 psi | 89% | 3140 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 53,272 psi | 87% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,969 psi | 90% | 3091 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 52,605 psi | 86% | 3081 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 55,100 psi | 90% | 3087 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,940 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,085 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,636 psi | 90% | 3104 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,170 psi | 86% | 3071 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,346 psi | 89% | 3077 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 51,721 psi | 85% | 3077 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,257 psi | 86% | 3068 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,397 psi | 75% | 2992 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,388 psi | 86% | 3153 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,734 psi | 83% | 3058 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 54,781 psi | 90% | 3005 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 51,721 psi | 85% | 3077 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 54,215 psi | 89% | 2992 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 51,764 psi | 85% | 2969 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,533 psi | 86% | 3041 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 86% | 52,185 psi | 86% | 2995 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 96% | 52,707 psi | 87% | 3022 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,085 psi | 90% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,556 psi | 73% | 3025 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 52,431 psi | 86% | 3074 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,463 psi | 60% | 1896 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,547 psi | 86% | 2946 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,100 psi | 90% | 2986 fps | 99.3% |
| IMR 4350 | <<locked>> | 90% | 51,982 psi | 85% | 2972 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,504 psi | 86% | 2966 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 54,505 psi | 89% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,433 psi | 89% | 3015 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,751 psi | 88% | 3114 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 52,968 psi | 87% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,750 psi | 87% | 2966 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 53,954 psi | 89% | 3009 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,340 psi | 76% | 2897 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 53,388 psi | 88% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,489 psi | 86% | 3022 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 54,940 psi | 90% | 3166 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 52,808 psi | 87% | 3031 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,302 psi | 89% | 3025 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,186 psi | 89% | 3130 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 55,071 psi | 90% | 3087 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,385 psi | 79% | 2999 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,130 psi | 61% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,100 psi | 90% | 3009 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,779 psi | 85% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,983 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,286 psi | 86% | 3094 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,614 psi | 73% | 3022 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 54,752 psi | 90% | 2956 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,085 psi | 90% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,171 psi | 87% | 3002 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 53,563 psi | 88% | 3061 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 54,215 psi | 89% | 2992 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,750 psi | 87% | 2966 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 52,968 psi | 87% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,954 psi | 89% | 3009 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,997 psi | 87% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,475 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,098 psi | 86% | 2910 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,113 psi | 87% | 3058 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 54,839 psi | 90% | 2999 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,911 psi | 90% | 2995 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 52,040 psi | 85% | 3031 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,230 psi | 89% | 3038 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 86% | 52,808 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,853 psi | 90% | 3025 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,664 psi | 88% | 3012 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 53,708 psi | 88% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,940 psi | 89% | 3028 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,955 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,605 psi | 85% | 3091 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,418 psi | 89% | 2986 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,750 psi | 87% | 3045 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,514 psi | 78% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,215 psi | 89% | 3028 fps | 98.2% |
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% | 50,270 psi | 83% | 2884 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,534 psi | 57% | 2641 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 50,053 psi | 82% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,334 psi | 63% | 2749 fps | 98.5% |
| Accurate High Country | 75.8 gr | 92% | 46,166 psi | 76% | 3009 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 96% | 50,357 psi | 83% | 3071 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,992 psi | 77% | 2861 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,264 psi | 69% | 2848 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 49,182 psi | 81% | 3015 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,453 psi | 70% | 2848 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,558 psi | 78% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,894 psi | 84% | 2959 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,130 psi | 61% | 2759 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,322 psi | 69% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,989 psi | 69% | 2841 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 42,264 psi | 69% | 2894 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,340 psi | 45% | 2503 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,054 psi | 54% | 2684 fps | 95.7% |
| Alliant Reloder-26 | 69.6 gr | 82% | 31,343 psi | 51% | 2680 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 41,684 psi | 68% | 2877 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,167 psi | 79% | 2900 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 42,264 psi | 69% | 2894 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 42,192 psi | 69% | 2766 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 48,298 psi | 79% | 2910 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,147 psi | 66% | 2795 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 43,163 psi | 71% | 2822 fps | 96% |
| Hodgdon H4831 | <<locked>> | 94% | 49,269 psi | 81% | 2959 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,737 psi | 57% | 2648 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,698 psi | 68% | 2956 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 39,102 psi | 64% | 2802 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 45% | 1696 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,443 psi | 81% | 2894 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,750 psi | 85% | 2927 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,782 psi | 62% | 2684 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,555 psi | 72% | 2795 fps | 97.3% |
| IMR 4831 | <<locked>> | 80% | 36,840 psi | 60% | 2700 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,892 psi | 79% | 2897 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 46,905 psi | 77% | 2982 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,632 psi | 81% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,118 psi | 68% | 2743 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,421 psi | 65% | 2723 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,533 psi | 55% | 2618 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 50,256 psi | 83% | 2943 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,786 psi | 70% | 2835 fps | 95.4% |
| Norma MRP | 70.9 gr | 86% | 36,274 psi | 60% | 2779 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 38,014 psi | 62% | 2743 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,676 psi | 83% | 2966 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,862 psi | 77% | 2995 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,796 psi | 60% | 2726 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 94% | 38,856 psi | 64% | 2795 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 46% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,312 psi | 79% | 2890 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,962 psi | 74% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,043 psi | 62% | 2766 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,869 psi | 61% | 2772 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,740 psi | 64% | 2874 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 51,532 psi | 85% | 2904 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,281 psi | 74% | 2844 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,833 psi | 77% | 2884 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 41,118 psi | 68% | 2822 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,192 psi | 69% | 2766 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,118 psi | 68% | 2743 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,632 psi | 81% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,421 psi | 65% | 2723 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,311 psi | 76% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,311 psi | 76% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,263 psi | 66% | 2687 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,741 psi | 67% | 2818 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,498 psi | 75% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,329 psi | 84% | 2933 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,432 psi | 57% | 2697 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,015 psi | 64% | 2746 fps | 95.6% |
| 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% | 38,508 psi | 63% | 2723 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,212 psi | 82% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,798 psi | 64% | 2740 fps | 98.3% |
| Vihtavuori N555 | <<locked>> | 80% | 30,139 psi | 49% | 2582 fps | 96.5% |
| Vihtavuori N560 | <<locked>> | 94% | 48,080 psi | 79% | 3022 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,580 psi | 63% | 2710 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,335 psi | 66% | 2802 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,831 psi | 42% | 2533 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,118 psi | 68% | 2785 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 83 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Speer Deep Curl Soft Point. Norma MRP delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,166 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 83 of the 83 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 1:14.5 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, Accurate High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | Speer Deep Curl Soft Point 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.