Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Woodleigh PP SN bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 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 2700 | <<locked>> | 82% | 54,273 psi | 89% | 2959 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 52,692 psi | 87% | 3005 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 53,766 psi | 88% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,592 psi | 90% | 3058 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 54,012 psi | 89% | 3156 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 98% | 54,984 psi | 90% | 3153 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 53,766 psi | 88% | 2979 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 51,982 psi | 85% | 3041 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 53,359 psi | 88% | 3097 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,156 psi | 86% | 3041 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,679 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,839 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,011 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,924 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,940 psi | 90% | 3091 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,562 psi | 86% | 3097 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,098 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,093 psi | 76% | 3009 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,200 psi | 87% | 3166 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,547 psi | 85% | 3074 fps | 97.9% |
| Bofors RP3 | <<locked>> | 82% | 51,996 psi | 85% | 2966 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,562 psi | 86% | 3097 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 54,694 psi | 90% | 3005 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 52,257 psi | 86% | 2982 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 53,214 psi | 87% | 3054 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 52,866 psi | 87% | 3012 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 53,505 psi | 88% | 3041 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,388 psi | 86% | 3022 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,199 psi | 86% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,179 psi | 74% | 3045 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 53,301 psi | 88% | 3091 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 60% | 1903 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,084 psi | 87% | 2959 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,576 psi | 86% | 2989 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,939 psi | 87% | 2976 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 51,750 psi | 85% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,984 psi | 90% | 3028 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,491 psi | 89% | 3133 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 53,505 psi | 88% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,171 psi | 87% | 2976 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,621 psi | 90% | 3022 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,963 psi | 77% | 2907 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,143 psi | 89% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,098 psi | 87% | 3038 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 52,127 psi | 86% | 3120 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 53,476 psi | 88% | 3045 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,752 psi | 90% | 3035 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,955 psi | 90% | 3150 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 52,243 psi | 86% | 3041 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,052 psi | 81% | 3012 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 61% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,141 psi | 86% | 2963 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,286 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,636 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,924 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,237 psi | 74% | 3038 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 84% | 52,098 psi | 86% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,751 psi | 88% | 3015 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 54,186 psi | 89% | 3077 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,694 psi | 90% | 3005 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,171 psi | 87% | 2976 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,505 psi | 88% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,621 psi | 90% | 3022 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,461 psi | 88% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,939 psi | 87% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,750 psi | 87% | 2927 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,708 psi | 88% | 3071 fps | 98.3% |
| Somchem S355 | <<locked>> | 84% | 52,112 psi | 86% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,808 psi | 85% | 2946 fps | 95.9% |
| Somchem S365 | <<locked>> | 92% | 52,779 psi | 87% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,042 psi | 90% | 3054 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 53,272 psi | 87% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 51,808 psi | 85% | 2979 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,215 psi | 89% | 3022 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 54,186 psi | 89% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,578 psi | 90% | 3041 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,040 psi | 85% | 3051 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,344 psi | 86% | 3107 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,027 psi | 90% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,432 psi | 88% | 3061 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,515 psi | 80% | 3146 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,042 psi | 90% | 3045 fps | 98.4% |
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 2700 | <<locked>> | 80% | 50,749 psi | 83% | 2897 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,793 psi | 54% | 2598 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,618 psi | 83% | 2897 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,856 psi | 64% | 2766 fps | 98.7% |
| Accurate High Country | <<locked>> | 92% | 46,775 psi | 77% | 3022 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 96% | 51,169 psi | 84% | 3087 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,500 psi | 78% | 2871 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,844 psi | 70% | 2861 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,499 psi | 76% | 2966 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,859 psi | 70% | 2861 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,109 psi | 79% | 2897 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,430 psi | 84% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,594 psi | 62% | 2772 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,844 psi | 70% | 2904 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,380 psi | 70% | 2851 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,045 psi | 66% | 2844 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,688 psi | 45% | 2516 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,430 psi | 52% | 2638 fps | 95% |
| Alliant Reloder-26 | 70.4 gr | 82% | 31,807 psi | 52% | 2697 fps | 96.2% |
| Bofors RP15 | <<locked>> | 94% | 42,235 psi | 69% | 2894 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,704 psi | 80% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,045 psi | 66% | 2844 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,641 psi | 70% | 2779 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 48,791 psi | 80% | 2920 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,640 psi | 67% | 2808 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,613 psi | 72% | 2835 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 49,821 psi | 82% | 2972 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,820 psi | 80% | 2956 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,201 psi | 58% | 2661 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,552 psi | 65% | 2904 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,653 psi | 65% | 2822 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 45% | 1699 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,951 psi | 82% | 2907 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,218 psi | 63% | 2697 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,005 psi | 72% | 2808 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 37,130 psi | 61% | 2710 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,428 psi | 80% | 2910 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 47,616 psi | 78% | 3002 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,183 psi | 82% | 2900 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,597 psi | 68% | 2759 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,842 psi | 65% | 2736 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,939 psi | 56% | 2628 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,792 psi | 83% | 2956 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,178 psi | 71% | 2848 fps | 95.6% |
| Norma MRP | 71.6 gr | 86% | 36,637 psi | 60% | 2792 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,508 psi | 63% | 2759 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,169 psi | 84% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,222 psi | 73% | 2943 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 37,260 psi | 61% | 2740 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,465 psi | 65% | 2812 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 46% | 1739 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,776 psi | 80% | 2904 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,484 psi | 75% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,508 psi | 63% | 2779 fps | 98.4% |
| ReloadSwiss RS 70 | 68 gr | 80% | 37,275 psi | 61% | 2785 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,521 psi | 60% | 2818 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 45,832 psi | 75% | 2858 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,239 psi | 78% | 2897 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,582 psi | 68% | 2835 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,641 psi | 70% | 2779 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,597 psi | 68% | 2759 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,183 psi | 82% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,842 psi | 65% | 2736 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,847 psi | 77% | 2910 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 77% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,654 psi | 67% | 2697 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,191 psi | 68% | 2828 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,006 psi | 76% | 2854 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,501 psi | 80% | 2887 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,940 psi | 57% | 2710 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 37,086 psi | 61% | 2700 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 43,961 psi | 72% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,929 psi | 66% | 2756 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,885 psi | 64% | 2733 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,691 psi | 83% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,233 psi | 64% | 2753 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,589 psi | 50% | 2595 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 48,820 psi | 80% | 3041 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,928 psi | 64% | 2720 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,785 psi | 67% | 2812 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,424 psi | 40% | 2477 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,669 psi | 68% | 2802 fps | 95.3% |
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 82 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,903 fps to 3,166 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 82 of the 82 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 1:15.5 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. Norma MRP, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | Woodleigh PP SN 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.