Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 183gr | Peregrine Plainsmaster (VLR-4) bullet and 90 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.
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% | 54,897 psi | 90% | 2756 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,939 psi | 87% | 2785 fps | 99% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,317 psi | 89% | 2884 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 52,025 psi | 85% | 2766 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,634 psi | 86% | 2874 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 51,953 psi | 85% | 2972 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 98% | 52,750 psi | 87% | 2969 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 52,446 psi | 86% | 2802 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,911 psi | 89% | 2923 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 98% | 51,706 psi | 85% | 2920 fps | 97.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,041 psi | 89% | 2920 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,055 psi | 87% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,403 psi | 88% | 2844 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,766 psi | 88% | 2933 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,042 psi | 90% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,316 psi | 88% | 2913 fps | 98.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,302 psi | 89% | 2972 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,227 psi | 84% | 2900 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,425 psi | 73% | 2831 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,042 psi | 90% | 3045 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,661 psi | 82% | 2897 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 53,751 psi | 88% | 2838 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,302 psi | 89% | 2972 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 53,374 psi | 88% | 2828 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,121 psi | 72% | 2766 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 84% | 54,244 psi | 89% | 2858 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 51,474 psi | 85% | 2874 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 55,042 psi | 90% | 2894 fps | 99% |
| Hodgdon H4831 | <<locked>> | 96% | 51,909 psi | 85% | 2864 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,331 psi | 89% | 2904 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,070 psi | 89% | 2854 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,482 psi | 71% | 2867 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 51,517 psi | 85% | 2910 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 60% | 1772 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 51,909 psi | 85% | 2782 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,259 psi | 89% | 2818 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 54,331 psi | 89% | 2864 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,085 psi | 90% | 2858 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 53,461 psi | 88% | 2871 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,781 psi | 90% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,432 psi | 88% | 2851 fps | 97.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,707 psi | 87% | 2949 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 51,938 psi | 85% | 2776 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,998 psi | 90% | 2851 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 52,852 psi | 87% | 2841 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,933 psi | 74% | 2733 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 52,707 psi | 87% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 90% | 51,547 psi | 85% | 2861 fps | 98.2% |
| Norma MRP | <<locked>> | 98% | 53,737 psi | 88% | 2999 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 51,750 psi | 85% | 2861 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,345 psi | 88% | 2858 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,011 psi | 87% | 2966 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 54,099 psi | 89% | 2920 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,137 psi | 77% | 2835 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,014 psi | 61% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,143 psi | 89% | 2841 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,578 psi | 90% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,750 psi | 87% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,085 psi | 90% | 2986 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,221 psi | 71% | 2858 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 53,809 psi | 88% | 2785 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,838 psi | 88% | 2835 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,257 psi | 86% | 2841 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 96% | 52,533 psi | 86% | 2897 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 53,374 psi | 88% | 2828 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,998 psi | 90% | 2851 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 51,938 psi | 85% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,852 psi | 87% | 2841 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,011 psi | 85% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,114 psi | 90% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,723 psi | 90% | 2805 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,069 psi | 85% | 2894 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 53,838 psi | 88% | 2828 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,853 psi | 88% | 2835 fps | 96.9% |
| Somchem S365 | <<locked>> | 94% | 54,665 psi | 90% | 2917 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,084 psi | 87% | 2874 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 54,302 psi | 89% | 2743 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,534 psi | 90% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 51,750 psi | 85% | 2756 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,766 psi | 88% | 2854 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,518 psi | 86% | 2848 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 82% | 52,779 psi | 87% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,939 psi | 87% | 2861 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,548 psi | 88% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,070 psi | 89% | 2989 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,963 psi | 75% | 2835 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,505 psi | 88% | 2825 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 51,706 psi | 85% | 2877 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,354 psi | 76% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,142 psi | 87% | 2864 fps | 98.5% |
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% | 51,242 psi | 84% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,400 psi | 81% | 2726 fps | 98.5% |
| Accurate 3100 | <<locked>> | 84% | 30,995 psi | 51% | 2434 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 48,631 psi | 80% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,115 psi | 61% | 2592 fps | 98.8% |
| Accurate High Country | 68.9 gr | 90% | 41,916 psi | 69% | 2782 fps | 95.2% |
| Accurate MAGPRO | <<locked>> | 96% | 49,168 psi | 81% | 2907 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 46,354 psi | 76% | 2700 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 38,856 psi | 64% | 2635 fps | 95% |
| ADI AR 2213 | <<locked>> | 94% | 45,049 psi | 74% | 2792 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 38,885 psi | 64% | 2638 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,673 psi | 77% | 2720 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,951 psi | 82% | 2792 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,434 psi | 60% | 2608 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,423 psi | 68% | 2733 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,479 psi | 63% | 2628 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,479 psi | 63% | 2674 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,382 psi | 43% | 2359 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,023 psi | 49% | 2477 fps | 95.2% |
| Alliant Reloder-26 | 63.1 gr | 80% | 28,123 psi | 46% | 2464 fps | 95.2% |
| Bofors RP15 | <<locked>> | 92% | 38,145 psi | 63% | 2664 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 46,876 psi | 77% | 2733 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,479 psi | 63% | 2674 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 41,278 psi | 68% | 2608 fps | 97% |
| Hodgdon H1000 | <<locked>> | 98% | 41,162 psi | 68% | 2703 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 47,471 psi | 78% | 2749 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 39,262 psi | 64% | 2641 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 42,235 psi | 69% | 2664 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 94% | 48,443 psi | 80% | 2805 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 47,340 psi | 78% | 2785 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,910 psi | 56% | 2497 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 38,029 psi | 62% | 2736 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 38,276 psi | 63% | 2654 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,151 psi | 45% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,762 psi | 80% | 2733 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,039 psi | 84% | 2766 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 37,072 psi | 61% | 2539 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,873 psi | 70% | 2641 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 35,752 psi | 59% | 2546 fps | 98.6% |
| IMR 4895 | <<locked>> | 80% | 51,256 psi | 84% | 2818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,094 psi | 77% | 2743 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 43,033 psi | 71% | 2766 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 48,820 psi | 80% | 2726 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,161 psi | 66% | 2589 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 38,493 psi | 63% | 2572 fps | 97.1% |
| Lovex S071 | <<locked>> | 88% | 30,269 psi | 50% | 2415 fps | 95% |
| Norma 203B | <<locked>> | 80% | 49,313 psi | 81% | 2779 fps | 100% |
| Norma 204 | <<locked>> | 82% | 39,015 psi | 64% | 2621 fps | 95% |
| Norma MRP | 65.8 gr | 86% | 35,099 psi | 58% | 2625 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 37,173 psi | 61% | 2592 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 80% | 49,719 psi | 82% | 2802 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,757 psi | 70% | 2772 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 35,940 psi | 59% | 2575 fps | 97% |
| Ramshot Magnum | <<locked>> | 94% | 37,768 psi | 62% | 2648 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 45% | 1624 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,543 psi | 78% | 2733 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,048 psi | 72% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,985 psi | 61% | 2612 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,955 psi | 59% | 2621 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,925 psi | 57% | 2651 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 50,589 psi | 83% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,251 psi | 73% | 2680 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,902 psi | 70% | 2671 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 86% | 37,405 psi | 61% | 2608 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,278 psi | 68% | 2608 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,161 psi | 66% | 2589 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 48,820 psi | 80% | 2726 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,493 psi | 63% | 2572 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,498 psi | 75% | 2736 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,629 psi | 75% | 2585 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,262 psi | 64% | 2533 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,755 psi | 65% | 2661 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 44,483 psi | 73% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,905 psi | 77% | 2717 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 33,547 psi | 55% | 2546 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,534 psi | 58% | 2536 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 50,937 psi | 84% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,285 psi | 84% | 2713 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,627 psi | 70% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,537 psi | 63% | 2589 fps | 99% |
| Vihtavuori N165 | <<locked>> | 90% | 37,405 psi | 61% | 2572 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,458 psi | 81% | 2710 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,971 psi | 62% | 2589 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 29,022 psi | 48% | 2431 fps | 97% |
| Vihtavuori N560 | <<locked>> | 94% | 47,166 psi | 77% | 2864 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 98% | 42,873 psi | 70% | 2772 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,739 psi | 62% | 2559 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 39,421 psi | 65% | 2644 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,163 psi | 38% | 2320 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,030 psi | 66% | 2631 fps | 95.6% |
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 90 powders for .300 Blaser Mag. loaded with the .308 | 183gr | Peregrine Plainsmaster (VLR-4). Alliant Reloder-26 delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,045 fps. Accurate 3100 gives the best case fill at 100 %, and 90 of the 90 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 183.0 gr projectile in 0.308" calls for a 1:10.5 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 183gr | Peregrine Plainsmaster (VLR-4) 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.