Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 140gr | Barnes MPG bullet and 92 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Hodgdon H414.
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.
A valid access license is required to use the Personalized Load Calculator.
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 2015 | <<locked>> | 82% | 54,752 psi | 90% | 3097 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,056 psi | 89% | 3123 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,663 psi | 86% | 3110 fps | 96.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,034 psi | 74% | 3061 fps | 96.8% |
| Accurate 4064 | <<locked>> | 88% | 54,244 psi | 89% | 3176 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,230 psi | 89% | 3261 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 54,041 psi | 89% | 3205 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 55,114 psi | 90% | 3205 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,924 psi | 87% | 3153 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,012 psi | 89% | 3130 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,809 psi | 88% | 3330 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,011 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,431 psi | 86% | 3199 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,764 psi | 85% | 3268 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,881 psi | 87% | 3304 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,453 psi | 70% | 3091 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,167 psi | 79% | 3281 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,853 psi | 88% | 3219 fps | 99.6% |
| Bofors RP3 | <<locked>> | 88% | 52,533 psi | 86% | 3189 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,518 psi | 86% | 3153 fps | 96.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,346 psi | 89% | 3133 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,388 psi | 86% | 3179 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,258 psi | 87% | 3199 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 94% | 53,403 psi | 88% | 3258 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 92% | 53,809 psi | 88% | 3215 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 84% | 54,621 psi | 90% | 3219 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 51,663 psi | 85% | 3186 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,375 psi | 89% | 3251 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,795 psi | 88% | 3291 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 58% | 2018 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,330 psi | 86% | 3163 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 54,578 psi | 90% | 3199 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,708 psi | 90% | 3192 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,244 psi | 89% | 3159 fps | 97.6% |
| IMR 4350 | <<locked>> | 96% | 53,040 psi | 87% | 3179 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,418 psi | 89% | 3192 fps | 97.6% |
| IMR 4831 | <<locked>> | 98% | 54,911 psi | 90% | 3255 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 53,795 psi | 88% | 3232 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 52,924 psi | 87% | 3153 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,954 psi | 89% | 3179 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,417 psi | 88% | 3130 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 54,549 psi | 90% | 3186 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,056 psi | 89% | 3186 fps | 98.7% |
| Lovex S070 | <<locked>> | 96% | 54,969 psi | 90% | 3222 fps | 98% |
| Norma 201 | <<locked>> | 84% | 52,765 psi | 87% | 3146 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,229 psi | 87% | 3146 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,114 psi | 90% | 3241 fps | 100% |
| Norma MRPᴾ | <<locked>> | 100% | 47,674 psi | 78% | 3228 fps | 96.3% |
| Norma URP | <<locked>> | 96% | 53,156 psi | 87% | 3248 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 86% | 52,112 psi | 86% | 3202 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 96% | 52,112 psi | 86% | 3238 fps | 98.2% |
| Ramshot TAC | <<locked>> | 82% | 53,055 psi | 87% | 3163 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,823 psi | 87% | 3186 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 59% | 2064 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,664 psi | 88% | 3182 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,663 psi | 86% | 3264 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,518 psi | 86% | 3304 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,114 psi | 89% | 3284 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,432 psi | 88% | 3314 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 82% | 53,708 psi | 88% | 3130 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,476 psi | 88% | 3150 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,591 psi | 86% | 3182 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 52,518 psi | 86% | 3153 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,056 psi | 89% | 3186 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,954 psi | 89% | 3179 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,549 psi | 90% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,969 psi | 90% | 3222 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,186 psi | 89% | 3245 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,663 psi | 85% | 3140 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,388 psi | 86% | 3169 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,896 psi | 88% | 3081 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,505 psi | 89% | 3077 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,230 psi | 89% | 3130 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 53,548 psi | 88% | 3077 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,897 psi | 90% | 3192 fps | 99.9% |
| Somchem S355 | <<locked>> | 90% | 52,750 psi | 87% | 3179 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 51,430 psi | 84% | 3248 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,155 psi | 84% | 3176 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 84% | 54,259 psi | 89% | 3064 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,330 psi | 88% | 3114 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,954 psi | 89% | 3127 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,273 psi | 89% | 3159 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,069 psi | 85% | 3186 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 82% | 53,156 psi | 87% | 3146 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,156 psi | 86% | 3117 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,795 psi | 90% | 3251 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,152 psi | 77% | 3179 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,199 psi | 86% | 3159 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,534 psi | 88% | 3202 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,635 psi | 88% | 3261 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,218 psi | 63% | 3104 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,359 psi | 86% | 3176 fps | 100% |
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 2015 | <<locked>> | 80% | 51,343 psi | 84% | 3045 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,411 psi | 73% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,253 psi | 76% | 2989 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 38,986 psi | 64% | 2930 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 41,989 psi | 69% | 2959 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 35,723 psi | 59% | 2881 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 47,630 psi | 78% | 3087 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 40,408 psi | 66% | 2917 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,676 psi | 82% | 3094 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,430 psi | 83% | 3077 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,598 psi | 72% | 3123 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,306 psi | 66% | 2943 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,236 psi | 71% | 3018 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 84% | 35,433 psi | 58% | 2890 fps | 95.8% |
| Alliant Reloder-17 | 63.3 gr | 80% | 34,911 psi | 57% | 2907 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 90% | 30,908 psi | 51% | 2782 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,056 psi | 59% | 2986 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,108 psi | 77% | 3091 fps | 98.8% |
| Bofors RP3 | <<locked>> | 80% | 40,132 psi | 66% | 2946 fps | 99% |
| Bofors RP7 | <<locked>> | 88% | 46,441 psi | 76% | 3035 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,082 psi | 84% | 3077 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,950 psi | 80% | 3120 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,901 psi | 67% | 2953 fps | 96.8% |
| Hodgdon H414 | 68.1 gr | 88% | 43,540 psi | 71% | 3061 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 90% | 50,285 psi | 83% | 3150 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 48,080 psi | 79% | 3100 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,676 psi | 50% | 2720 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,338 psi | 73% | 3068 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 46,586 psi | 76% | 3150 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 44% | 1804 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,064 psi | 76% | 3045 fps | 99.5% |
| IMR 3031 | <<locked>> | 80% | 47,863 psi | 79% | 3091 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,395 psi | 70% | 2956 fps | 98.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,933 psi | 74% | 2979 fps | 95.5% |
| IMR 4350 | <<locked>> | 92% | 46,702 psi | 77% | 3061 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,136 psi | 74% | 3012 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 34,534 psi | 57% | 2831 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 44,324 psi | 73% | 3051 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 49,676 psi | 82% | 3094 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,152 psi | 77% | 3064 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,123 psi | 77% | 3015 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 42,409 psi | 70% | 2959 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 39,624 psi | 65% | 2894 fps | 95.5% |
| Lovex S070 | <<locked>> | 88% | 42,830 psi | 70% | 2982 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 46,644 psi | 77% | 3035 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 46,978 psi | 77% | 3041 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,627 psi | 70% | 3002 fps | 98.8% |
| Norma MRP | <<locked>> | 98% | 44,628 psi | 73% | 3159 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 35,810 psi | 59% | 2881 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 42,366 psi | 70% | 3015 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 39,972 psi | 66% | 2986 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 49,719 psi | 82% | 3100 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,371 psi | 81% | 3123 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,890 psi | 44% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,191 psi | 68% | 2933 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,818 psi | 75% | 3133 fps | 98.9% |
| ReloadSwiss RS 60 | 63.3 gr | 80% | 37,130 psi | 61% | 2982 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,433 psi | 58% | 2897 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 37,724 psi | 62% | 2966 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 50,415 psi | 83% | 3077 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,295 psi | 73% | 2979 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,724 psi | 62% | 2884 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 46,441 psi | 76% | 3035 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,624 psi | 65% | 2894 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,152 psi | 77% | 3064 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,409 psi | 70% | 2959 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 42,830 psi | 70% | 2982 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,725 psi | 64% | 2936 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,254 psi | 79% | 3077 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,992 psi | 76% | 3048 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,718 psi | 78% | 2979 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,900 psi | 66% | 2825 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 44,382 psi | 73% | 2949 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 47,485 psi | 78% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,979 psi | 79% | 3071 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 38,537 psi | 63% | 2894 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 28,021 psi | 46% | 2697 fps | 96% |
| Somchem S385 | <<locked>> | 98% | 47,718 psi | 78% | 3114 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 48,095 psi | 79% | 2969 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,990 psi | 72% | 2959 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,454 psi | 73% | 2966 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,622 psi | 60% | 2818 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 34,983 psi | 57% | 2822 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 49,792 psi | 82% | 3091 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,989 psi | 71% | 2953 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 36,912 psi | 61% | 2884 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 90% | 33,692 psi | 55% | 2871 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,532 psi | 53% | 2733 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 49,951 psi | 82% | 3140 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,743 psi | 72% | 3068 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,341 psi | 48% | 2805 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,658 psi | 75% | 3054 fps | 99.5% |
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 92 powders for .300 Blaser Mag. loaded with the .308 | 140gr | Barnes MPG. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,018 fps to 3,330 fps. Accurate 3100 gives the best case fill at 100 %, and 92 of the 92 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 140.0 gr projectile in 0.308" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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. ReloadSwiss RS 60, Alliant Reloder-17, Hodgdon H414 rank at the top here: for .300 Blaser Mag. with the .308 | 140gr | Barnes MPG 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.