Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 159gr | IBEX TRD bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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 2700 | <<locked>> | 82% | 53,592 psi | 88% | 2956 fps | 98.1% |
| Accurate 3100 | <<locked>> | 98% | 51,953 psi | 85% | 3012 fps | 99.2% |
| Accurate 4064 | <<locked>> | 82% | 54,099 psi | 89% | 2969 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,809 psi | 88% | 3064 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 52,750 psi | 87% | 2979 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,027 psi | 89% | 3091 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,998 psi | 90% | 3159 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,911 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,012 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,664 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,984 psi | 90% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,505 psi | 88% | 3084 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,157 psi | 89% | 3143 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,271 psi | 84% | 3077 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,165 psi | 74% | 3002 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,882 psi | 90% | 3222 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,038 psi | 82% | 3064 fps | 96.8% |
| Bofors RP3 | <<locked>> | 84% | 55,027 psi | 90% | 3031 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,157 psi | 89% | 3143 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 54,056 psi | 89% | 3005 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 55,071 psi | 90% | 3045 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 51,822 psi | 85% | 3048 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 54,940 psi | 90% | 3061 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,143 psi | 89% | 3038 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 51,459 psi | 84% | 3077 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 60% | 1909 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,475 psi | 86% | 2966 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,708 psi | 90% | 2992 fps | 98.8% |
| IMR 4350 | <<locked>> | 92% | 54,636 psi | 90% | 3035 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 51,996 psi | 85% | 2972 fps | 98.4% |
| IMR 4831 | <<locked>> | 92% | 54,056 psi | 89% | 3054 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,707 psi | 87% | 3110 fps | 96% |
| Lovex S062 | <<locked>> | 82% | 53,055 psi | 87% | 2966 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,736 psi | 87% | 2982 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 53,853 psi | 88% | 3022 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,586 psi | 76% | 2917 fps | 98.4% |
| Norma 203B | <<locked>> | 82% | 53,417 psi | 88% | 3018 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,100 psi | 90% | 3084 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 53,867 psi | 88% | 3173 fps | 98.9% |
| Norma URP | <<locked>> | 90% | 52,228 psi | 86% | 3045 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 53,577 psi | 88% | 3038 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,026 psi | 87% | 3123 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 92% | 54,215 psi | 89% | 3094 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,848 psi | 79% | 2999 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 62% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,636 psi | 90% | 3018 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,404 psi | 89% | 3136 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,272 psi | 87% | 3084 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,013 psi | 90% | 3163 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,208 psi | 73% | 3015 fps | 97% |
| Rottweil R 903 | <<locked>> | 86% | 55,013 psi | 90% | 3025 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,373 psi | 86% | 3002 fps | 96% |
| Rottweil R 905 | <<locked>> | 96% | 52,721 psi | 87% | 3068 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,056 psi | 89% | 3005 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,736 psi | 87% | 2982 fps | 99.4% |
| Shooters World Precision | <<locked>> | 82% | 53,055 psi | 87% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,853 psi | 88% | 3022 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,518 psi | 86% | 3028 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,141 psi | 86% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,214 psi | 86% | 2927 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,243 psi | 86% | 3061 fps | 97.4% |
| Somchem S355 | <<locked>> | 86% | 54,839 psi | 90% | 3022 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 54,868 psi | 90% | 3104 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,679 psi | 88% | 3048 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 55,085 psi | 90% | 2936 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,085 psi | 90% | 2946 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,605 psi | 86% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,041 psi | 89% | 3035 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,765 psi | 87% | 3015 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 53,388 psi | 88% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,519 psi | 88% | 3045 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 54,186 psi | 89% | 3110 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,085 psi | 89% | 3156 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,417 psi | 88% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,069 psi | 85% | 3054 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,775 psi | 77% | 3143 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,490 psi | 88% | 3035 fps | 97.4% |
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 2700 | <<locked>> | 80% | 50,299 psi | 83% | 2897 fps | 97.5% |
| Accurate 3100 | <<locked>> | 86% | 35,520 psi | 58% | 2677 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,213 psi | 84% | 2923 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,146 psi | 64% | 2782 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,949 psi | 77% | 2877 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 44,889 psi | 74% | 2917 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,387 psi | 84% | 3100 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,790 psi | 78% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,850 psi | 83% | 2979 fps | 100% |
| Alliant Reloder-16 | 58.9 gr | 80% | 37,420 psi | 61% | 2779 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,090 psi | 69% | 2907 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 44,483 psi | 73% | 2910 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 44,831 psi | 74% | 2963 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,384 psi | 47% | 2543 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,678 psi | 55% | 2710 fps | 95% |
| Alliant Reloder-26 | 66.6 gr | 82% | 32,097 psi | 53% | 2713 fps | 95.3% |
| Bofors RP15 | <<locked>> | 96% | 44,295 psi | 73% | 2949 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,428 psi | 80% | 2927 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 44,831 psi | 74% | 2963 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,554 psi | 70% | 2782 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 48,588 psi | 80% | 2933 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 40,248 psi | 66% | 2815 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,033 psi | 71% | 2831 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,215 psi | 58% | 2674 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 80% | 39,204 psi | 64% | 2818 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 45% | 1709 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,385 psi | 81% | 2910 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,561 psi | 85% | 2940 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 40,364 psi | 66% | 2756 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,526 psi | 71% | 2808 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 37,391 psi | 61% | 2730 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 98% | 49,545 psi | 81% | 3048 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 49,951 psi | 82% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,785 psi | 69% | 2769 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 40,030 psi | 66% | 2749 fps | 96% |
| Lovex S071 | <<locked>> | 90% | 34,548 psi | 57% | 2654 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 50,241 psi | 82% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 86% | 45,382 psi | 75% | 2907 fps | 95.3% |
| Norma MRP | 69.4 gr | 88% | 38,972 psi | 64% | 2861 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 38,348 psi | 63% | 2766 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 50,198 psi | 82% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 49,516 psi | 81% | 3054 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 37,115 psi | 61% | 2749 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 41,771 psi | 69% | 2871 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,152 psi | 46% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,327 psi | 79% | 2907 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,527 psi | 73% | 2966 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,493 psi | 63% | 2795 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,173 psi | 61% | 2792 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 41,452 psi | 68% | 2949 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 45,774 psi | 75% | 2871 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 49,429 psi | 81% | 2949 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 43,714 psi | 72% | 2894 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,554 psi | 70% | 2782 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,785 psi | 69% | 2769 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 49,951 psi | 82% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,030 psi | 66% | 2749 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,180 psi | 76% | 2917 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,470 psi | 76% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,872 psi | 67% | 2707 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 43,294 psi | 71% | 2887 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 46,006 psi | 76% | 2867 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 34,940 psi | 57% | 2726 fps | 99.6% |
| Somchem S385 | <<locked>> | 88% | 41,945 psi | 69% | 2822 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,011 psi | 85% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,851 psi | 85% | 2900 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,772 psi | 72% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,726 psi | 65% | 2766 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 94% | 43,555 psi | 72% | 2844 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,343 psi | 83% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,378 psi | 65% | 2769 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 31,183 psi | 51% | 2625 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 96% | 50,691 psi | 83% | 3091 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,769 psi | 64% | 2730 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 40,422 psi | 66% | 2818 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,992 psi | 44% | 2575 fps | 96.1% |
| Winchester Supreme 780 | <<locked>> | 92% | 43,758 psi | 72% | 2854 fps | 95% |
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 | 159gr | IBEX TRD. Alliant Reloder-26 delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,222 fps. Alliant Reloder-22 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 60–90 %, leaving at least 10 % headroom. The 159.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-22, Alliant Reloder-23, 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. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Blaser Mag. with the .308 | 159gr | IBEX TRD 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.