Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 186gr | Peregrine Glider (Glider GRM) 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.
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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 2495 | <<locked>> | 82% | 54,201 psi | 89% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,315 psi | 86% | 2746 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,505 psi | 88% | 2841 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 54,737 psi | 90% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 51,996 psi | 85% | 2835 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 54,911 psi | 90% | 2992 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 98% | 52,054 psi | 85% | 2930 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 84% | 52,112 psi | 86% | 2766 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,272 psi | 87% | 2884 fps | 98.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,737 psi | 90% | 2940 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,607 psi | 90% | 2940 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,417 psi | 88% | 2881 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,533 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,808 psi | 87% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,142 psi | 87% | 2894 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,447 psi | 89% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,707 psi | 87% | 2874 fps | 98.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,519 psi | 88% | 2933 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,386 psi | 83% | 2858 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,787 psi | 72% | 2792 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,056 psi | 89% | 3002 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,863 psi | 80% | 2854 fps | 98% |
| Bofors RP3 | <<locked>> | 84% | 53,214 psi | 87% | 2802 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,519 psi | 88% | 2933 fps | 98.9% |
| Bofors RP7 | <<locked>> | 88% | 52,750 psi | 87% | 2789 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 84% | 53,563 psi | 88% | 2818 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,520 psi | 90% | 2894 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 88% | 54,447 psi | 89% | 2854 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 98% | 54,853 psi | 90% | 2884 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,577 psi | 88% | 2864 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,505 psi | 88% | 2818 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,013 psi | 90% | 2851 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,888 psi | 70% | 2825 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 90% | 54,636 psi | 90% | 2930 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 60% | 1752 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,897 psi | 90% | 2799 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,998 psi | 89% | 2782 fps | 99.5% |
| IMR 4350 | <<locked>> | 92% | 53,867 psi | 88% | 2825 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,476 psi | 89% | 2818 fps | 99.5% |
| IMR 4831 | <<locked>> | 92% | 52,678 psi | 86% | 2831 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,215 psi | 89% | 2835 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,852 psi | 87% | 2812 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,982 psi | 85% | 2907 fps | 97.4% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 90% | 2789 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,433 psi | 89% | 2812 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 52,301 psi | 86% | 2802 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,295 psi | 73% | 2694 fps | 99% |
| Norma 203B | <<locked>> | 82% | 52,112 psi | 86% | 2795 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,534 psi | 90% | 2881 fps | 98.6% |
| Norma MRP | <<locked>> | 98% | 52,953 psi | 87% | 2956 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 54,534 psi | 90% | 2877 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,707 psi | 87% | 2818 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,373 psi | 86% | 2927 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 53,417 psi | 88% | 2881 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,586 psi | 76% | 2799 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 61% | 1791 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,548 psi | 88% | 2802 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,940 psi | 89% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,025 psi | 85% | 2861 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,491 psi | 89% | 2949 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,598 psi | 70% | 2815 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 53,403 psi | 88% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,301 psi | 88% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,984 psi | 90% | 2854 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 96% | 51,851 psi | 85% | 2858 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 88% | 52,750 psi | 87% | 2789 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,433 psi | 89% | 2812 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 90% | 2789 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,301 psi | 86% | 2802 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 51,547 psi | 85% | 2808 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,563 psi | 90% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,215 psi | 89% | 2769 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,911 psi | 90% | 2910 fps | 99% |
| Somchem S355 | <<locked>> | 86% | 53,345 psi | 88% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,171 psi | 87% | 2795 fps | 96.8% |
| Somchem S365 | <<locked>> | 94% | 53,838 psi | 88% | 2874 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,504 psi | 86% | 2835 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 53,795 psi | 88% | 2707 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,954 psi | 89% | 2723 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,665 psi | 90% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,185 psi | 87% | 2818 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,808 psi | 85% | 2808 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 52,301 psi | 86% | 2723 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,228 psi | 86% | 2825 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,852 psi | 87% | 2884 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,374 psi | 88% | 2949 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,707 psi | 87% | 2785 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,752 psi | 90% | 2897 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,397 psi | 75% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,634 psi | 86% | 2831 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% | 50,763 psi | 83% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,936 psi | 80% | 2690 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 30,589 psi | 50% | 2402 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 48,124 psi | 79% | 2680 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,738 psi | 60% | 2559 fps | 98.8% |
| Accurate High Country | 67.3 gr | 90% | 41,234 psi | 68% | 2743 fps | 95% |
| Accurate MAGPRO | <<locked>> | 96% | 48,472 psi | 80% | 2867 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 45,948 psi | 75% | 2664 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 40,872 psi | 67% | 2654 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 44,541 psi | 73% | 2756 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,879 psi | 84% | 2881 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 38,522 psi | 63% | 2602 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,267 psi | 76% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,574 psi | 81% | 2756 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,071 psi | 59% | 2575 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,930 psi | 67% | 2697 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,130 psi | 63% | 2595 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,029 psi | 62% | 2638 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,092 psi | 43% | 2326 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 29,631 psi | 49% | 2444 fps | 95.1% |
| Alliant Reloder-26 | 61.7 gr | 80% | 27,789 psi | 46% | 2431 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 40,219 psi | 66% | 2687 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 46,485 psi | 76% | 2697 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,029 psi | 62% | 2638 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,930 psi | 67% | 2575 fps | 97% |
| Hodgdon H380 | <<locked>> | 80% | 46,891 psi | 77% | 2710 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 38,769 psi | 64% | 2605 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 41,916 psi | 69% | 2628 fps | 96.5% |
| Hodgdon H4831 | <<locked>> | 94% | 47,877 psi | 79% | 2766 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,746 psi | 77% | 2746 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,504 psi | 55% | 2464 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,372 psi | 84% | 2799 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 37,579 psi | 62% | 2697 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 37,826 psi | 62% | 2618 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 44% | 1562 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,341 psi | 79% | 2697 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,517 psi | 83% | 2726 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 36,593 psi | 60% | 2503 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,540 psi | 70% | 2608 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 35,389 psi | 58% | 2513 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 50,850 psi | 83% | 2782 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,659 psi | 77% | 2707 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 45,382 psi | 75% | 2789 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 48,370 psi | 79% | 2690 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,813 psi | 65% | 2556 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 37,971 psi | 62% | 2536 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 31,807 psi | 52% | 2431 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 48,921 psi | 80% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,437 psi | 68% | 2644 fps | 95.9% |
| Norma MRP | 64.3 gr | 86% | 34,650 psi | 57% | 2589 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 36,622 psi | 60% | 2556 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 49,269 psi | 81% | 2766 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,032 psi | 69% | 2730 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 35,520 psi | 58% | 2543 fps | 96.9% |
| Ramshot Magnum | <<locked>> | 94% | 37,202 psi | 61% | 2608 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 45% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,079 psi | 77% | 2697 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,540 psi | 71% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,521 psi | 60% | 2575 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,592 psi | 58% | 2585 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,447 psi | 57% | 2612 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,125 psi | 82% | 2700 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,613 psi | 72% | 2644 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,554 psi | 70% | 2638 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 39,552 psi | 65% | 2631 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,930 psi | 67% | 2575 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,813 psi | 65% | 2556 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 48,370 psi | 79% | 2690 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,971 psi | 62% | 2536 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,991 psi | 74% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,165 psi | 74% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,972 psi | 64% | 2500 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 39,175 psi | 64% | 2625 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 44,077 psi | 72% | 2644 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,398 psi | 76% | 2680 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 32,996 psi | 54% | 2510 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 35,157 psi | 58% | 2503 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 50,401 psi | 83% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,647 psi | 83% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,061 psi | 69% | 2572 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,189 psi | 63% | 2556 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 36,970 psi | 61% | 2536 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 48,950 psi | 80% | 2674 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,507 psi | 62% | 2556 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,645 psi | 47% | 2398 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 46,456 psi | 76% | 2825 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,231 psi | 61% | 2523 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 38,957 psi | 64% | 2608 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 22,858 psi | 38% | 2290 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,610 psi | 65% | 2598 fps | 95.5% |
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 | 186gr | Peregrine Glider (Glider GRM). Alliant Reloder-26 delivers the highest muzzle velocity at 3,002 fps; across all powders the maximum-charge window runs from 1,752 fps to 3,002 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 186.0 gr projectile in 0.308" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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 | 186gr | Peregrine Glider (Glider GRM) 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.