Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 150gr | Barnes TSX FN FB bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Hodgdon Superformance.
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>> | 84% | 54,781 psi | 90% | 3054 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,229 psi | 87% | 3064 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,212 psi | 82% | 3091 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 55,085 psi | 90% | 3110 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,402 psi | 86% | 3159 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 54,679 psi | 90% | 3143 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,649 psi | 86% | 3094 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 54,099 psi | 89% | 3202 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,445 psi | 84% | 3215 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,012 psi | 89% | 3199 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,127 psi | 87% | 3120 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,330 psi | 88% | 3140 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,476 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,795 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,243 psi | 87% | 3189 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,343 psi | 83% | 3182 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,384 psi | 78% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,321 psi | 68% | 3018 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,592 psi | 90% | 3327 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,853 psi | 90% | 3159 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 53,809 psi | 88% | 3133 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,343 psi | 83% | 3182 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 53,519 psi | 88% | 3110 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 54,317 psi | 89% | 3150 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 55,027 psi | 90% | 3215 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 55,027 psi | 90% | 3176 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,737 psi | 88% | 3143 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 51,880 psi | 85% | 3133 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 51,445 psi | 84% | 3186 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,013 psi | 59% | 1985 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,011 psi | 87% | 3100 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,156 psi | 86% | 3077 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,882 psi | 90% | 3110 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,476 psi | 89% | 3143 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 52,040 psi | 85% | 3087 fps | 98.2% |
| IMR 4831 | <<locked>> | 94% | 53,069 psi | 87% | 3150 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,752 psi | 90% | 3173 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,897 psi | 90% | 3114 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,679 psi | 88% | 3064 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,040 psi | 85% | 3068 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,071 psi | 90% | 3136 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 52,866 psi | 87% | 3120 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,495 psi | 68% | 2923 fps | 97% |
| Norma 201 | <<locked>> | 82% | 53,330 psi | 88% | 3081 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,186 psi | 89% | 3084 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,591 psi | 86% | 3123 fps | 100% |
| Norma 204 | <<locked>> | 92% | 51,532 psi | 85% | 3133 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 53,577 psi | 88% | 3274 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 55,114 psi | 90% | 3205 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,461 psi | 88% | 3150 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,853 psi | 88% | 3199 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 60% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,520 psi | 90% | 3133 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,259 psi | 89% | 3212 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,244 psi | 89% | 3248 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,417 psi | 86% | 3182 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 51,300 psi | 84% | 3209 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 53,940 psi | 89% | 3084 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,896 psi | 88% | 3130 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 52,243 psi | 86% | 3169 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 53,519 psi | 88% | 3110 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,071 psi | 90% | 3136 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,897 psi | 90% | 3114 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 52,040 psi | 85% | 3068 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,866 psi | 87% | 3120 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 52,185 psi | 86% | 3136 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,388 psi | 88% | 3114 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,447 psi | 89% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,011 psi | 85% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,100 psi | 90% | 3087 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 51,779 psi | 85% | 3163 fps | 97.1% |
| Somchem S335 | <<locked>> | 82% | 53,998 psi | 89% | 3009 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,925 psi | 89% | 3123 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,143 psi | 89% | 3205 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,823 psi | 87% | 3143 fps | 98% |
| Vihtavuori N133 | <<locked>> | 82% | 54,998 psi | 90% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,273 psi | 89% | 3045 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,766 psi | 90% | 3061 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 51,938 psi | 85% | 3048 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,708 psi | 88% | 3140 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 3051 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 53,026 psi | 87% | 3054 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,808 psi | 87% | 3146 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,794 psi | 87% | 3199 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,621 psi | 88% | 3110 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,692 psi | 85% | 3156 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,598 psi | 70% | 3163 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,403 psi | 88% | 3120 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,243 psi | 87% | 3136 fps | 97.1% |
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% | 47,747 psi | 78% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,572 psi | 76% | 2940 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 37,768 psi | 62% | 2841 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 45,237 psi | 74% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,040 psi | 56% | 2769 fps | 96.3% |
| ADI AR 2206H | <<locked>> | 80% | 51,256 psi | 84% | 3084 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,627 psi | 72% | 2923 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 47,282 psi | 78% | 3071 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,863 psi | 79% | 3146 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,253 psi | 78% | 3071 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,729 psi | 72% | 2946 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,760 psi | 77% | 3018 fps | 99.6% |
| Alliant Reloder-16 | 62.2 gr | 80% | 33,910 psi | 56% | 2792 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,377 psi | 63% | 2933 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,615 psi | 77% | 3061 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,833 psi | 77% | 3110 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,876 psi | 46% | 2628 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,216 psi | 59% | 2884 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,708 psi | 57% | 2894 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,227 psi | 84% | 3097 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 43,700 psi | 72% | 2953 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,833 psi | 77% | 3110 fps | 95.9% |
| Bofors RP7 | <<locked>> | 82% | 41,336 psi | 68% | 2867 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,309 psi | 73% | 2963 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 39,001 psi | 64% | 2890 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 45,266 psi | 74% | 2989 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,198 psi | 51% | 2674 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,544 psi | 80% | 3074 fps | 100% |
| Hodgdon Superformance | 74.3 gr | 84% | 41,176 psi | 68% | 2969 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 44% | 1775 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,676 psi | 82% | 3045 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,861 psi | 75% | 2963 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,269 psi | 79% | 2989 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 42,003 psi | 69% | 2904 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,379 psi | 66% | 2844 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 32,996 psi | 54% | 2726 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 47,950 psi | 79% | 3051 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,314 psi | 84% | 3058 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,560 psi | 83% | 3012 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,803 psi | 75% | 2959 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,565 psi | 62% | 2785 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 38,232 psi | 63% | 2818 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 36,114 psi | 59% | 2799 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,922 psi | 82% | 3025 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,734 psi | 83% | 3028 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,108 psi | 76% | 3005 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 48,182 psi | 79% | 3071 fps | 95.8% |
| Norma MRP | <<locked>> | 92% | 40,147 psi | 66% | 2995 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,258 psi | 56% | 2772 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 46,485 psi | 76% | 3028 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 84% | 38,276 psi | 63% | 2884 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 45% | 1814 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,556 psi | 73% | 2946 fps | 97.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,473 psi | 83% | 3146 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,843 psi | 67% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,011 psi | 56% | 2792 fps | 96% |
| ReloadSwiss RS 70 | 68 gr | 80% | 33,475 psi | 55% | 2792 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 47,485 psi | 78% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,002 psi | 67% | 2890 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 45,484 psi | 75% | 3038 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 41,336 psi | 68% | 2867 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,565 psi | 62% | 2785 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,314 psi | 84% | 3058 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,803 psi | 75% | 2959 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,232 psi | 63% | 2818 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,395 psi | 70% | 2949 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,835 psi | 82% | 3051 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,155 psi | 84% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,004 psi | 71% | 2815 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,465 psi | 65% | 2785 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,063 psi | 74% | 3035 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,662 psi | 83% | 2959 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,568 psi | 68% | 2894 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,777 psi | 51% | 2723 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 43,178 psi | 71% | 2956 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 51,706 psi | 85% | 2949 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,761 psi | 78% | 2943 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,037 psi | 79% | 2953 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,668 psi | 65% | 2822 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,679 psi | 59% | 2779 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 96% | 42,569 psi | 70% | 2930 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 46,427 psi | 76% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,172 psi | 58% | 2776 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 30,472 psi | 50% | 2710 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,201 psi | 58% | 2749 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 39,175 psi | 64% | 2897 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,065 psi | 46% | 2720 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,777 psi | 82% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 46,006 psi | 76% | 3005 fps | 95.4% |
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 89 powders for .300 Blaser Mag. loaded with the .308 | 150gr | Barnes TSX FN FB. Alliant Reloder-26 delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 1,985 fps to 3,327 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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-16, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .300 Blaser Mag. with the .308 | 150gr | Barnes TSX FN FB 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.