Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 210gr | Berger LRBTHP bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Winchester StaBALL HD and IMR 7828 SSC.
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>> | 94% | 52,156 psi | 86% | 2667 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,766 psi | 88% | 2700 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 53,403 psi | 88% | 2815 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 94% | 54,230 psi | 89% | 2815 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 92% | 54,534 psi | 90% | 2756 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 51,967 psi | 85% | 2756 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,543 psi | 76% | 2657 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,321 psi | 68% | 2625 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,592 psi | 90% | 2749 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,679 psi | 90% | 2749 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 51,938 psi | 85% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,911 psi | 89% | 2743 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 51,822 psi | 85% | 2756 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 96% | 52,881 psi | 87% | 2726 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,054 psi | 85% | 2785 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,852 psi | 87% | 2812 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 54,215 psi | 89% | 2723 fps | 96.5% |
| Bofors RP15 | <<locked>> | 98% | 54,563 psi | 90% | 2795 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 48,037 psi | 79% | 2726 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 51,822 psi | 85% | 2756 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 53,171 psi | 87% | 2651 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 51,169 psi | 84% | 2740 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 51,909 psi | 85% | 2697 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 54,766 psi | 90% | 2710 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 52,156 psi | 86% | 2697 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,563 psi | 90% | 2736 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,984 psi | 90% | 2674 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,010 psi | 84% | 2848 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 84% | 51,938 psi | 85% | 2736 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,927 psi | 61% | 1667 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,404 psi | 89% | 2687 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,621 psi | 90% | 2671 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 54,056 psi | 89% | 2690 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,621 psi | 88% | 2687 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 96% | 53,534 psi | 88% | 2792 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 55,042 psi | 90% | 2667 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 53,171 psi | 87% | 2664 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,127 psi | 87% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 86% | 51,735 psi | 85% | 2687 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 36,912 psi | 61% | 2556 fps | 97.9% |
| Norma MRP | <<locked>> | 92% | 51,590 psi | 85% | 2776 fps | 100% |
| Norma URP | <<locked>> | 86% | 52,373 psi | 86% | 2684 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,896 psi | 88% | 2808 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 88% | 54,636 psi | 90% | 2740 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 51,866 psi | 85% | 2746 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 62% | 1706 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,563 psi | 88% | 2720 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 51,706 psi | 85% | 2746 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 51,314 psi | 84% | 2844 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 46,354 psi | 76% | 2736 fps | 97% |
| Rottweil R 903 | <<locked>> | 82% | 54,288 psi | 89% | 2648 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 52,388 psi | 86% | 2674 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 92% | 53,388 psi | 88% | 2733 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 53,171 psi | 87% | 2651 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 55,042 psi | 90% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 53,171 psi | 87% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,476 psi | 89% | 2526 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,273 psi | 89% | 2625 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 52,953 psi | 87% | 2726 fps | 99.6% |
| Somchem S355 | <<locked>> | 82% | 53,940 psi | 89% | 2641 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,766 psi | 88% | 2667 fps | 98.4% |
| Somchem S365 | <<locked>> | 88% | 52,402 psi | 86% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,041 psi | 89% | 2707 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 84% | 55,013 psi | 90% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,186 psi | 89% | 2674 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 53,447 psi | 88% | 2687 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 86% | 53,345 psi | 88% | 2684 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 51,967 psi | 85% | 2707 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 51,619 psi | 85% | 2769 fps | 98.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,592 psi | 90% | 2805 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,601 psi | 78% | 2743 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,374 psi | 88% | 2635 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 52,127 psi | 86% | 2700 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 53,490 psi | 88% | 2854 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,795 psi | 88% | 2703 fps | 99.6% |
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% | 32,677 psi | 54% | 2313 fps | 97.7% |
| Accurate 4350 | <<locked>> | 80% | 43,961 psi | 72% | 2546 fps | 100% |
| Accurate High Country | 63.1 gr | 82% | 37,782 psi | 62% | 2523 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 86% | 40,886 psi | 67% | 2579 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 36,811 psi | 60% | 2431 fps | 96.3% |
| ADI AR 2213 | <<locked>> | 84% | 37,391 psi | 61% | 2474 fps | 95% |
| ADI AR 2217 | <<locked>> | 94% | 38,174 psi | 63% | 2490 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 90% | 30,153 psi | 50% | 2346 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 37,072 psi | 61% | 2434 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,047 psi | 69% | 2552 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,515 psi | 80% | 2664 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,724 psi | 60% | 2428 fps | 96.4% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,780 psi | 57% | 2428 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,372 psi | 52% | 2343 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,470 psi | 45% | 2257 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 33,939 psi | 56% | 2470 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 51,140 psi | 84% | 2671 fps | 95.8% |
| Bofors RP15 | <<locked>> | 84% | 34,534 psi | 57% | 2418 fps | 95.6% |
| Bofors RP30 | <<locked>> | 92% | 36,738 psi | 60% | 2507 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 34,780 psi | 57% | 2428 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 46,934 psi | 77% | 2549 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 90% | 36,666 psi | 60% | 2457 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 45,513 psi | 75% | 2592 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 80% | 48,182 psi | 79% | 2605 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 84% | 39,885 psi | 65% | 2480 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 84% | 39,160 psi | 64% | 2464 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,856 psi | 65% | 2444 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 32,358 psi | 53% | 2434 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 44,817 psi | 74% | 2618 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 46% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,482 psi | 70% | 2490 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,312 psi | 79% | 2572 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 41,887 psi | 69% | 2497 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 39,175 psi | 64% | 2428 fps | 95.2% |
| IMR 7828 SSC | 63.7 gr | 86% | 38,377 psi | 63% | 2510 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,847 psi | 75% | 2526 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 44,063 psi | 72% | 2516 fps | 99.4% |
| Lovex S071 | <<locked>> | 80% | 28,224 psi | 46% | 2201 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 42,206 psi | 69% | 2523 fps | 97.7% |
| Norma 217 | <<locked>> | 94% | 30,385 psi | 50% | 2388 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 33,837 psi | 56% | 2434 fps | 97% |
| Norma URP | <<locked>> | 80% | 43,120 psi | 71% | 2533 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 37,884 psi | 62% | 2513 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 41,959 psi | 69% | 2533 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 84% | 31,459 psi | 52% | 2346 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 47% | 1526 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,729 psi | 72% | 2566 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,901 psi | 69% | 2582 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,401 psi | 52% | 2415 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 40,030 psi | 66% | 2608 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,836 psi | 83% | 2598 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 38,058 psi | 62% | 2411 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 80% | 35,926 psi | 59% | 2411 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 80% | 46,934 psi | 77% | 2549 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,847 psi | 75% | 2526 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 44,063 psi | 72% | 2516 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,271 psi | 84% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,846 psi | 74% | 2477 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,607 psi | 58% | 2408 fps | 96.2% |
| Somchem S355 | <<locked>> | 80% | 50,807 psi | 83% | 2595 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,336 psi | 68% | 2454 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,118 psi | 66% | 2497 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,550 psi | 60% | 2398 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 80% | 48,515 psi | 80% | 2523 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,657 psi | 73% | 2530 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 31,633 psi | 52% | 2283 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 44,034 psi | 72% | 2536 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 35,099 psi | 58% | 2411 fps | 99.7% |
| Vihtavuori N560 | <<locked>> | 84% | 39,189 psi | 64% | 2539 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 90% | 38,957 psi | 64% | 2526 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 44,512 psi | 73% | 2684 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,584 psi | 72% | 2493 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,745 psi | 75% | 2595 fps | 99.5% |
| Winchester StaBALL HD | 60.9 gr | 80% | 27,775 psi | 46% | 2359 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 33,243 psi | 55% | 2326 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 75 powders for .300 Blaser Mag. loaded with the .308 | 210gr | Berger LRBTHP. Winchester StaBALL HD delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,667 fps to 2,854 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 210.0 gr projectile in 0.308" calls for a 1:11.5 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. Accurate High Country, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .300 Blaser Mag. with the .308 | 210gr | Berger LRBTHP 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.