Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Barnes X BT bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Vihtavuori N560.
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% | 53,577 psi | 88% | 2874 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 51,793 psi | 85% | 2861 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,578 psi | 90% | 3005 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 53,185 psi | 87% | 2818 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,998 psi | 90% | 2946 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 52,852 psi | 87% | 2946 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,871 psi | 65% | 2743 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,462 psi | 89% | 2844 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,764 psi | 85% | 2907 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,678 psi | 86% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,636 psi | 90% | 2940 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,518 psi | 86% | 2953 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,200 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,385 psi | 81% | 2930 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,171 psi | 87% | 3022 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,882 psi | 90% | 2989 fps | 98.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,542 psi | 75% | 2858 fps | 96.6% |
| Bofors RP5 | <<locked>> | 96% | 52,518 psi | 86% | 2953 fps | 98.6% |
| Bofors RP7 | <<locked>> | 86% | 54,534 psi | 90% | 2851 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,762 psi | 80% | 2861 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 53,011 psi | 87% | 2904 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 84% | 52,475 psi | 86% | 2858 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 94% | 52,837 psi | 87% | 2887 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,967 psi | 85% | 2871 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,301 psi | 86% | 2835 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,385 psi | 79% | 2976 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 52,605 psi | 86% | 2933 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 61% | 1801 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,286 psi | 86% | 2835 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,562 psi | 86% | 2822 fps | 99.3% |
| IMR 4831 | <<locked>> | 88% | 52,011 psi | 85% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,418 psi | 89% | 2874 fps | 97.2% |
| IMR 7828 SSC | <<locked>> | 98% | 53,983 psi | 89% | 2979 fps | 97.7% |
| Lovex S065 | <<locked>> | 86% | 53,272 psi | 87% | 2828 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 54,650 psi | 90% | 2874 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,140 psi | 84% | 2835 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 52,692 psi | 87% | 2884 fps | 98.3% |
| Norma MRP | <<locked>> | 94% | 52,112 psi | 86% | 2976 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 53,403 psi | 88% | 2890 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,375 psi | 89% | 2995 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 52,170 psi | 86% | 2894 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,591 psi | 86% | 2933 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,942 psi | 62% | 1844 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,025 psi | 85% | 2917 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,723 psi | 90% | 2933 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,504 psi | 86% | 2953 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,660 psi | 80% | 2972 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 82% | 52,750 psi | 87% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,258 psi | 87% | 2861 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 94% | 54,273 psi | 89% | 2930 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 54,534 psi | 90% | 2851 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,272 psi | 87% | 2828 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 54,650 psi | 90% | 2874 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,243 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,634 psi | 86% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,779 psi | 87% | 2779 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,809 psi | 88% | 2927 fps | 98.7% |
| Somchem S355 | <<locked>> | 82% | 52,446 psi | 86% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,955 psi | 90% | 2858 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 53,200 psi | 87% | 2897 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,114 psi | 90% | 2907 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 53,403 psi | 88% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 51,822 psi | 85% | 2831 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,085 psi | 89% | 2877 fps | 99% |
| Vihtavuori N550 | <<locked>> | 88% | 54,650 psi | 90% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,808 psi | 87% | 2913 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,185 psi | 86% | 2963 fps | 97% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,750 psi | 85% | 2940 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,317 psi | 89% | 2841 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,258 psi | 87% | 2907 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,460 psi | 86% | 3064 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,476 psi | 89% | 2894 fps | 98.6% |
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% | 32,648 psi | 54% | 2461 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 42,989 psi | 71% | 2707 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 92% | 47,703 psi | 78% | 2881 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 50,256 psi | 83% | 2769 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 40,437 psi | 66% | 2671 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 46,673 psi | 77% | 2828 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 96% | 35,520 psi | 58% | 2628 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 51,488 psi | 85% | 2799 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,596 psi | 67% | 2700 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,122 psi | 76% | 2818 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 40,263 psi | 66% | 2667 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,348 psi | 63% | 2667 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,937 psi | 51% | 2484 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,777 psi | 51% | 2493 fps | 95.5% |
| Alliant Reloder-26 | 64.2 gr | 80% | 33,083 psi | 54% | 2602 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 40,437 psi | 66% | 2713 fps | 95.7% |
| Bofors RP30 | <<locked>> | 98% | 42,801 psi | 70% | 2802 fps | 95.8% |
| Bofors RP5 | <<locked>> | 86% | 38,348 psi | 63% | 2667 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,687 psi | 75% | 2694 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 43,018 psi | 71% | 2746 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 43,903 psi | 72% | 2736 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,485 psi | 76% | 2749 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 46,601 psi | 77% | 2776 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,820 psi | 80% | 2815 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,493 psi | 63% | 2592 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,014 psi | 62% | 2730 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,743 psi | 70% | 2753 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 46% | 1608 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,075 psi | 67% | 2625 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,630 psi | 77% | 2717 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 40,843 psi | 67% | 2651 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,643 psi | 75% | 2720 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 44,715 psi | 73% | 2805 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 44,933 psi | 74% | 2680 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 43,221 psi | 71% | 2667 fps | 98.1% |
| Lovex S071 | <<locked>> | 84% | 31,952 psi | 52% | 2441 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 40,741 psi | 67% | 2657 fps | 95.5% |
| Norma MRP | 63.9 gr | 82% | 35,288 psi | 58% | 2625 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,829 psi | 69% | 2684 fps | 99.5% |
| Ramshot Grand | <<locked>> | 92% | 44,556 psi | 73% | 2812 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 40,509 psi | 67% | 2677 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 90% | 37,492 psi | 62% | 2635 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,427 psi | 47% | 1647 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,747 psi | 80% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,163 psi | 69% | 2717 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,335 psi | 66% | 2720 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,099 psi | 58% | 2651 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,588 psi | 81% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,469 psi | 73% | 2703 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 39,726 psi | 65% | 2657 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 45,687 psi | 75% | 2694 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,933 psi | 74% | 2680 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 43,221 psi | 71% | 2667 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,125 psi | 82% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,690 psi | 82% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,961 psi | 72% | 2625 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 39,363 psi | 65% | 2651 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 49,559 psi | 81% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 48,443 psi | 80% | 2749 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 38,537 psi | 63% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,911 psi | 59% | 2536 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 47,239 psi | 78% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,221 psi | 71% | 2680 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 37,304 psi | 61% | 2566 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 42,641 psi | 70% | 2684 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 34,534 psi | 57% | 2562 fps | 98.7% |
| Vihtavuori N560 | 70.1 gr | 90% | 45,774 psi | 75% | 2841 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 45,469 psi | 75% | 2825 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,916 psi | 69% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,063 psi | 72% | 2740 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,760 psi | 46% | 2490 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,450 psi | 65% | 2618 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 72 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Barnes X BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,064 fps. ADI AR 2225 gives the best case fill at 100 %, and 72 of the 72 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 180.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, 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, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Barnes X BT 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.