Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Frontier PH HPBT bullet and 88 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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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>> | 82% | 54,636 psi | 90% | 2897 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,359 psi | 86% | 2910 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,476 psi | 88% | 3009 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 55,071 psi | 90% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,127 psi | 86% | 3012 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,114 psi | 90% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,982 psi | 87% | 3048 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,288 psi | 89% | 3097 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,114 psi | 89% | 3114 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,055 psi | 87% | 3045 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,402 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,547 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,750 psi | 87% | 3068 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,940 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,344 psi | 86% | 3035 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,127 psi | 87% | 3097 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,125 psi | 82% | 3028 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,758 psi | 72% | 2946 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,838 psi | 88% | 3173 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,791 psi | 80% | 3018 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 53,229 psi | 87% | 2976 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,127 psi | 87% | 3097 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 52,721 psi | 87% | 2959 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 53,606 psi | 88% | 2992 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,114 psi | 89% | 3061 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 54,157 psi | 89% | 3022 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 54,563 psi | 90% | 3045 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,374 psi | 88% | 3025 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,243 psi | 87% | 2989 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,621 psi | 90% | 3028 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,772 psi | 70% | 2972 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 90% | 54,317 psi | 89% | 3097 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 60% | 1883 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,563 psi | 90% | 2969 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,563 psi | 88% | 2949 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 53,563 psi | 88% | 2989 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,244 psi | 89% | 2986 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 52,518 psi | 86% | 2999 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,911 psi | 89% | 3009 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,605 psi | 86% | 2972 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,677 psi | 85% | 3068 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 54,679 psi | 90% | 2963 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,476 psi | 89% | 2986 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 52,286 psi | 86% | 2972 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,338 psi | 73% | 2851 fps | 98.4% |
| Norma 203B | <<locked>> | 82% | 51,851 psi | 85% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,244 psi | 89% | 3045 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 52,663 psi | 86% | 3123 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 54,331 psi | 89% | 3048 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,417 psi | 86% | 2989 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,170 psi | 86% | 3084 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 53,229 psi | 87% | 3048 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,354 psi | 76% | 2949 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,359 psi | 88% | 2972 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,417 psi | 88% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 51,750 psi | 85% | 3028 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,099 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,728 psi | 70% | 2966 fps | 97.3% |
| Rottweil R 902 | <<locked>> | 82% | 53,374 psi | 88% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,301 psi | 88% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,766 psi | 90% | 3018 fps | 97% |
| Rottweil R 905 | <<locked>> | 96% | 51,663 psi | 85% | 3022 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 88% | 52,721 psi | 87% | 2959 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,476 psi | 89% | 2986 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,679 psi | 90% | 2963 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,286 psi | 86% | 2972 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,694 psi | 90% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,317 psi | 89% | 2854 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,027 psi | 89% | 2933 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,665 psi | 90% | 3074 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 53,388 psi | 88% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,026 psi | 87% | 2953 fps | 95.8% |
| Somchem S365 | <<locked>> | 94% | 53,519 psi | 88% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,228 psi | 86% | 2995 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 53,563 psi | 88% | 2884 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,940 psi | 89% | 2900 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,563 psi | 90% | 2940 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,055 psi | 87% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,576 psi | 85% | 2969 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 52,083 psi | 86% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,054 psi | 85% | 2992 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 52,649 psi | 86% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,026 psi | 87% | 3107 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,533 psi | 86% | 2953 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,346 psi | 89% | 3064 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,382 psi | 75% | 3091 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,359 psi | 86% | 2989 fps | 97.7% |
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% | 51,227 psi | 84% | 2848 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,994 psi | 80% | 2851 fps | 97.7% |
| Accurate 3100 | <<locked>> | 86% | 33,170 psi | 54% | 2602 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 48,501 psi | 80% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,825 psi | 60% | 2710 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 45,730 psi | 75% | 2828 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 43,656 psi | 72% | 2867 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 47,456 psi | 78% | 2969 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,488 psi | 83% | 3051 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,816 psi | 72% | 2871 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,166 psi | 76% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,342 psi | 81% | 2923 fps | 100% |
| Alliant Reloder-16 | 59.6 gr | 80% | 35,969 psi | 59% | 2723 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,756 psi | 67% | 2854 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,308 psi | 71% | 2861 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,482 psi | 71% | 2913 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,382 psi | 43% | 2464 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,924 psi | 56% | 2703 fps | 95.9% |
| Alliant Reloder-26 | 69.1 gr | 84% | 32,300 psi | 53% | 2703 fps | 96.2% |
| Bofors RP15 | <<locked>> | 96% | 42,743 psi | 70% | 2894 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,572 psi | 76% | 2867 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,482 psi | 71% | 2913 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,031 psi | 67% | 2730 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 46,818 psi | 77% | 2874 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,798 psi | 64% | 2759 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 41,800 psi | 69% | 2782 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 50,850 psi | 83% | 2979 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,792 psi | 82% | 2959 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,489 psi | 55% | 2612 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,082 psi | 84% | 2972 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,176 psi | 66% | 2907 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 37,855 psi | 62% | 2766 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 45% | 1683 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,095 psi | 79% | 2864 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,357 psi | 83% | 2890 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 39,073 psi | 64% | 2707 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,409 psi | 70% | 2762 fps | 96.9% |
| IMR 4831 | <<locked>> | 80% | 35,433 psi | 58% | 2664 fps | 97.7% |
| IMR 4895 | <<locked>> | 80% | 50,604 psi | 83% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,458 psi | 81% | 2917 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 48,414 psi | 79% | 3005 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 48,254 psi | 79% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,958 psi | 66% | 2710 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 38,072 psi | 63% | 2687 fps | 95.9% |
| Lovex S071 | <<locked>> | 92% | 34,374 psi | 56% | 2635 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 48,689 psi | 80% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,106 psi | 72% | 2854 fps | 95.6% |
| Norma MRP | 70.3 gr | 88% | 37,362 psi | 61% | 2802 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 36,608 psi | 60% | 2707 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 49,023 psi | 80% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,486 psi | 80% | 3015 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 35,563 psi | 58% | 2690 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 96% | 40,132 psi | 66% | 2818 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 45% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,978 psi | 77% | 2858 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,279 psi | 71% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,535 psi | 60% | 2726 fps | 97.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,636 psi | 59% | 2733 fps | 97% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,885 psi | 65% | 2894 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 50,111 psi | 82% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,729 psi | 72% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,225 psi | 79% | 2904 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 42,192 psi | 69% | 2841 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,031 psi | 67% | 2730 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,958 psi | 66% | 2710 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 48,254 psi | 79% | 2861 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,072 psi | 63% | 2687 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,889 psi | 74% | 2864 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,179 psi | 74% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,044 psi | 64% | 2651 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,800 psi | 69% | 2835 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 44,164 psi | 73% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 49,661 psi | 82% | 2894 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,170 psi | 54% | 2664 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,321 psi | 66% | 2769 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 50,415 psi | 83% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,488 psi | 83% | 2848 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,047 psi | 69% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,043 psi | 62% | 2707 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 39,581 psi | 65% | 2743 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 48,805 psi | 80% | 2841 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,507 psi | 62% | 2707 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,906 psi | 47% | 2543 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 96% | 49,530 psi | 81% | 3045 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,347 psi | 61% | 2677 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,972 psi | 64% | 2762 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,889 psi | 41% | 2487 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,438 psi | 70% | 2805 fps | 95.2% |
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 88 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Frontier PH HPBT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,173 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 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 165.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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-26, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | Frontier PH HPBT 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.