Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 155gr | Atomic 29 HP bullet and 91 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 Ramshot Hunter.
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 2495 | <<locked>> | 84% | 54,114 psi | 89% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 52,910 psi | 87% | 3005 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,501 psi | 81% | 3031 fps | 98.8% |
| Accurate 4064 | <<locked>> | 86% | 54,505 psi | 89% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 51,735 psi | 85% | 3094 fps | 99.8% |
| Accurate High Countryᴾ | <<locked>> | 100% | 54,404 psi | 89% | 3241 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 82% | 54,317 psi | 89% | 3084 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 52,170 psi | 86% | 3031 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 53,316 psi | 88% | 3136 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 54,810 psi | 90% | 3219 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,229 psi | 87% | 3133 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 52,634 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 52,808 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,084 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,244 psi | 89% | 3192 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,489 psi | 86% | 3123 fps | 97.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,530 psi | 81% | 3117 fps | 96.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,601 psi | 77% | 3054 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,770 psi | 67% | 2959 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,737 psi | 88% | 3261 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,317 psi | 89% | 3100 fps | 100% |
| Bofors RP3 | <<locked>> | 86% | 53,127 psi | 87% | 3071 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,530 psi | 81% | 3117 fps | 96.8% |
| Bofors RP7 | <<locked>> | 90% | 53,026 psi | 87% | 3051 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 86% | 53,780 psi | 88% | 3087 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 92% | 54,534 psi | 90% | 3156 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 90% | 54,447 psi | 89% | 3110 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 82% | 54,911 psi | 90% | 3094 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,156 psi | 87% | 3081 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,042 psi | 90% | 3130 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 54,694 psi | 90% | 3192 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,940 psi | 59% | 1939 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,634 psi | 86% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 54,926 psi | 90% | 3068 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,462 psi | 89% | 3048 fps | 98.7% |
| IMR 4350 | <<locked>> | 94% | 54,012 psi | 89% | 3084 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 54,752 psi | 90% | 3081 fps | 98.7% |
| IMR 4831 | <<locked>> | 94% | 52,489 psi | 86% | 3091 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 54,201 psi | 89% | 3107 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 54,360 psi | 89% | 3051 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,447 psi | 88% | 3005 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,013 psi | 90% | 3064 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,650 psi | 90% | 3077 fps | 99.5% |
| Lovex S070 | <<locked>> | 92% | 52,286 psi | 86% | 3058 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,828 psi | 67% | 2864 fps | 97% |
| Norma 201 | <<locked>> | 82% | 52,852 psi | 87% | 3022 fps | 100% |
| Norma 202 | <<locked>> | 82% | 53,737 psi | 88% | 3022 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,098 psi | 86% | 3061 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,607 psi | 90% | 3133 fps | 97.3% |
| Norma MRPᴾ | <<locked>> | 100% | 52,547 psi | 86% | 3205 fps | 98.6% |
| Norma URP | <<locked>> | 94% | 54,491 psi | 89% | 3143 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 52,953 psi | 87% | 3091 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,272 psi | 87% | 3136 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,492 psi | 60% | 1982 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,085 psi | 89% | 3071 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 53,722 psi | 88% | 3150 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,592 psi | 88% | 3186 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 51,750 psi | 85% | 3120 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,404 psi | 89% | 3212 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 53,519 psi | 88% | 3022 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,229 psi | 87% | 3064 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 51,648 psi | 85% | 3107 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 53,026 psi | 87% | 3051 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,650 psi | 90% | 3077 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 54,360 psi | 89% | 3051 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,013 psi | 90% | 3064 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,286 psi | 86% | 3058 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,027 psi | 90% | 3130 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 52,939 psi | 87% | 3051 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,114 psi | 89% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 54,810 psi | 90% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,520 psi | 90% | 3025 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 54,737 psi | 90% | 3163 fps | 97.8% |
| Somchem S335 | <<locked>> | 82% | 53,577 psi | 88% | 2949 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,301 psi | 88% | 3061 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,359 psi | 88% | 3143 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,301 psi | 86% | 3084 fps | 98% |
| Vihtavuori N133 | <<locked>> | 82% | 54,621 psi | 90% | 2936 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 53,708 psi | 88% | 2982 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,230 psi | 89% | 2999 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 54,781 psi | 90% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,098 psi | 87% | 3081 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,196 psi | 79% | 2992 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 52,402 psi | 86% | 2992 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,315 psi | 86% | 3084 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,156 psi | 86% | 3140 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,939 psi | 87% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,534 psi | 90% | 3156 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,945 psi | 69% | 3100 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 52,765 psi | 87% | 3058 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,678 psi | 86% | 3077 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% | 47,384 psi | 78% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,093 psi | 76% | 2881 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 37,246 psi | 61% | 2782 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 44,860 psi | 74% | 2890 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,794 psi | 55% | 2720 fps | 96.5% |
| Accurate High Country | <<locked>> | 98% | 50,618 psi | 83% | 3173 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 50,995 psi | 84% | 3028 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,134 psi | 71% | 2861 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 46,804 psi | 77% | 3015 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,413 psi | 78% | 3084 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,789 psi | 77% | 3012 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,236 psi | 71% | 2887 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,499 psi | 76% | 2963 fps | 99.7% |
| Alliant Reloder-16 | 60.1 gr | 80% | 33,504 psi | 55% | 2736 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,913 psi | 62% | 2874 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,195 psi | 76% | 3005 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,236 psi | 71% | 2986 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,514 psi | 45% | 2575 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,752 psi | 59% | 2828 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 31,821 psi | 52% | 2766 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,618 psi | 83% | 3035 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 43,265 psi | 71% | 2894 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 43,236 psi | 71% | 2986 fps | 95% |
| Bofors RP7 | <<locked>> | 82% | 40,959 psi | 67% | 2808 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 43,918 psi | 72% | 2904 fps | 98.6% |
| Hodgdon H414 | <<locked>> | 82% | 38,566 psi | 63% | 2835 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 84% | 44,672 psi | 73% | 2927 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 51,576 psi | 85% | 3038 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,864 psi | 51% | 2621 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,008 psi | 79% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 40,756 psi | 67% | 2913 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 44% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,197 psi | 81% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,353 psi | 74% | 2900 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,892 psi | 79% | 2930 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 41,655 psi | 68% | 2848 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,972 psi | 66% | 2789 fps | 95.4% |
| IMR 4831 | <<locked>> | 80% | 32,605 psi | 54% | 2671 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 47,732 psi | 78% | 2995 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 50,734 psi | 83% | 2995 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,241 psi | 82% | 2953 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 45,469 psi | 75% | 2900 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,289 psi | 61% | 2730 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 37,898 psi | 62% | 2762 fps | 95.1% |
| Lovex S071 | <<locked>> | 96% | 35,723 psi | 59% | 2746 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,574 psi | 81% | 2966 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,212 psi | 82% | 2966 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,847 psi | 75% | 2949 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 47,485 psi | 78% | 3005 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 39,610 psi | 65% | 2936 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 33,968 psi | 56% | 2720 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 46,021 psi | 76% | 2966 fps | 99.8% |
| Ramshot Hunter | 65.4 gr | 82% | 35,433 psi | 58% | 2766 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,092 psi | 72% | 2884 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,067 psi | 82% | 3087 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,408 psi | 66% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,605 psi | 55% | 2736 fps | 96% |
| ReloadSwiss RS 70 | 65.8 gr | 80% | 33,127 psi | 54% | 2740 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 47,123 psi | 77% | 2913 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,727 psi | 67% | 2835 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 44,976 psi | 74% | 2979 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 82% | 40,959 psi | 67% | 2808 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,289 psi | 61% | 2730 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,734 psi | 83% | 2995 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 45,469 psi | 75% | 2900 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,898 psi | 62% | 2762 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,047 psi | 69% | 2894 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,545 psi | 81% | 2995 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,705 psi | 83% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,627 psi | 70% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,015 psi | 64% | 2730 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,570 psi | 73% | 2972 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 50,357 psi | 83% | 2900 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 41,234 psi | 68% | 2838 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 30,371 psi | 50% | 2667 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 42,699 psi | 70% | 2900 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 51,271 psi | 84% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,297 psi | 78% | 2884 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,776 psi | 78% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,392 psi | 65% | 2766 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 35,447 psi | 58% | 2726 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 96% | 42,032 psi | 69% | 2871 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 46,079 psi | 76% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,867 psi | 57% | 2723 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 30,139 psi | 49% | 2661 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,766 psi | 57% | 2694 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 38,740 psi | 64% | 2841 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,673 psi | 45% | 2667 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,298 psi | 81% | 2999 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,527 psi | 75% | 2946 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 91 powders for .300 Blaser Mag. loaded with the .308 | 155gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,261 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,261 fps. Accurate 3100 gives the best case fill at 100 %, and 91 of the 91 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 155.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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, Ramshot Hunter rank at the top here: for .300 Blaser Mag. with the .308 | 155gr | Atomic 29 HP 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.