Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 208gr | Berger Long Range Hybrid Target bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 53,548 psi | 88% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 51,721 psi | 85% | 2677 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,824 psi | 90% | 2838 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 51,851 psi | 85% | 2782 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 82% | 53,751 psi | 88% | 2638 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 52,591 psi | 86% | 2730 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 96% | 53,548 psi | 88% | 2782 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,846 psi | 74% | 2628 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,610 psi | 65% | 2589 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,678 psi | 86% | 2723 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,897 psi | 90% | 2661 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,620 psi | 86% | 2730 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 53,519 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,025 psi | 85% | 2717 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 53,185 psi | 87% | 2779 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,201 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,038 psi | 82% | 2759 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,244 psi | 89% | 2841 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 52,402 psi | 86% | 2766 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,948 psi | 75% | 2697 fps | 98.1% |
| Bofors RP5 | <<locked>> | 96% | 53,185 psi | 87% | 2779 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 54,955 psi | 90% | 2677 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,371 psi | 81% | 2710 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 86% | 53,534 psi | 88% | 2726 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 53,011 psi | 87% | 2687 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 53,693 psi | 88% | 2726 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,721 psi | 87% | 2710 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,055 psi | 87% | 2657 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,820 psi | 80% | 2815 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 86% | 53,519 psi | 88% | 2762 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 61% | 1663 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,736 psi | 87% | 2664 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,113 psi | 87% | 2651 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 52,156 psi | 86% | 2667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,924 psi | 85% | 2661 fps | 98% |
| IMR 7828 SSC | <<locked>> | 98% | 54,882 psi | 90% | 2815 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 53,505 psi | 88% | 2651 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,911 psi | 90% | 2694 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,126 psi | 84% | 2661 fps | 100% |
| Norma 204 | <<locked>> | 88% | 53,301 psi | 88% | 2717 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 35,273 psi | 58% | 2520 fps | 97.1% |
| Norma MRP | <<locked>> | 94% | 52,910 psi | 87% | 2802 fps | 100% |
| Norma URP | <<locked>> | 88% | 54,027 psi | 89% | 2713 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 51,706 psi | 85% | 2776 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 52,634 psi | 86% | 2717 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,417 psi | 88% | 2769 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,565 psi | 62% | 1699 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,953 psi | 87% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 51,677 psi | 85% | 2700 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 53,519 psi | 88% | 2779 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,037 psi | 81% | 2812 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 44,005 psi | 72% | 2694 fps | 96% |
| Rottweil R 903 | <<locked>> | 82% | 52,518 psi | 86% | 2628 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,027 psi | 89% | 2700 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 94% | 54,810 psi | 90% | 2756 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 86% | 54,955 psi | 90% | 2677 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,505 psi | 88% | 2651 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,911 psi | 90% | 2694 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,940 psi | 89% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,837 psi | 87% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,591 psi | 86% | 2602 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,360 psi | 89% | 2753 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 52,489 psi | 86% | 2625 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,982 psi | 85% | 2641 fps | 97.8% |
| Somchem S365 | <<locked>> | 90% | 53,708 psi | 88% | 2710 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 51,924 psi | 85% | 2680 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 53,417 psi | 88% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,330 psi | 86% | 2654 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,766 psi | 90% | 2710 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 54,882 psi | 90% | 2710 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,084 psi | 87% | 2730 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,997 psi | 87% | 2799 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,272 psi | 86% | 2772 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,085 psi | 90% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,795 psi | 88% | 2730 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,476 psi | 89% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 51,721 psi | 85% | 2677 fps | 99.2% |
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 3100 | <<locked>> | 80% | 31,299 psi | 51% | 2287 fps | 97% |
| Accurate 4350 | <<locked>> | 80% | 42,235 psi | 69% | 2523 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 38,725 psi | 64% | 2549 fps | 95.7% |
| Accurate MAGPRO | 67.1 gr | 88% | 41,959 psi | 69% | 2605 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 50,531 psi | 83% | 2592 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 35,505 psi | 58% | 2405 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 38,537 psi | 63% | 2500 fps | 95% |
| ADI AR 2217 | <<locked>> | 96% | 39,262 psi | 64% | 2513 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 92% | 30,908 psi | 51% | 2369 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,708 psi | 59% | 2408 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,619 psi | 85% | 2615 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,625 psi | 67% | 2530 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,514 psi | 76% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 35,375 psi | 58% | 2402 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 33,460 psi | 55% | 2398 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,197 psi | 50% | 2320 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,440 psi | 43% | 2228 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,416 psi | 53% | 2438 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 35,404 psi | 58% | 2444 fps | 95.6% |
| Bofors RP30 | <<locked>> | 94% | 37,492 psi | 62% | 2530 fps | 95.7% |
| Bofors RP5 | <<locked>> | 82% | 33,460 psi | 55% | 2398 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,455 psi | 75% | 2526 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 37,811 psi | 62% | 2484 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 43,961 psi | 72% | 2569 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,659 psi | 77% | 2582 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 41,147 psi | 68% | 2507 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 40,393 psi | 66% | 2493 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,232 psi | 63% | 2421 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 33,243 psi | 55% | 2461 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 42,888 psi | 70% | 2589 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 45% | 1483 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,075 psi | 67% | 2464 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,847 psi | 77% | 2549 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 40,321 psi | 66% | 2474 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 40,321 psi | 66% | 2454 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 39,392 psi | 65% | 2533 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 44,556 psi | 73% | 2507 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 42,815 psi | 70% | 2497 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 27,035 psi | 44% | 2175 fps | 95.1% |
| Norma 204 | <<locked>> | 80% | 40,785 psi | 67% | 2497 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 30,937 psi | 51% | 2405 fps | 95.1% |
| Norma MRP | 59.9 gr | 80% | 32,547 psi | 53% | 2405 fps | 96.2% |
| Norma URP | <<locked>> | 80% | 41,684 psi | 68% | 2513 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 38,943 psi | 64% | 2536 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 40,495 psi | 66% | 2510 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 86% | 32,271 psi | 53% | 2369 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,166 psi | 46% | 1519 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,342 psi | 81% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,916 psi | 69% | 2543 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,292 psi | 66% | 2556 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,198 psi | 53% | 2438 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 40,988 psi | 67% | 2631 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 49,298 psi | 81% | 2582 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 39,305 psi | 65% | 2441 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 34,664 psi | 57% | 2388 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,455 psi | 75% | 2526 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,556 psi | 73% | 2507 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 42,815 psi | 70% | 2497 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,488 psi | 83% | 2635 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,850 psi | 82% | 2467 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,410 psi | 71% | 2454 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,345 psi | 56% | 2382 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 49,371 psi | 81% | 2579 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 42,656 psi | 70% | 2480 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 38,406 psi | 63% | 2474 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,172 psi | 58% | 2372 fps | 96.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,137 psi | 77% | 2507 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,047 psi | 71% | 2507 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 32,416 psi | 53% | 2303 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 42,554 psi | 70% | 2513 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,736 psi | 55% | 2388 fps | 99.4% |
| Vihtavuori N560 | 64.4 gr | 86% | 40,350 psi | 66% | 2566 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 92% | 39,885 psi | 65% | 2549 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,032 psi | 69% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,179 psi | 73% | 2572 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,672 psi | 44% | 2326 fps | 99.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 34,287 psi | 56% | 2352 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 77 powders for .300 Blaser Mag. loaded with the .308 | 208gr | Berger Long Range Hybrid Target. Winchester StaBALL HD delivers the highest muzzle velocity at 2,881 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,881 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 208.0 gr projectile in 0.308" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 Blaser Mag. with the .308 | 208gr | Berger Long Range Hybrid Target 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.