Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | RWS Speed Tip Professional bullet and 87 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 ReloadSwiss RS 70.
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>> | 82% | 54,070 psi | 89% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 51,721 psi | 85% | 2894 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,910 psi | 87% | 2995 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 54,563 psi | 90% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,071 psi | 90% | 3051 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3136 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 54,462 psi | 89% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,431 psi | 86% | 3031 fps | 97.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,780 psi | 88% | 3084 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,664 psi | 88% | 3100 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 52,504 psi | 86% | 3031 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 51,938 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,054 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,330 psi | 86% | 3054 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,243 psi | 87% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,793 psi | 85% | 3022 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,547 psi | 86% | 3081 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,501 psi | 81% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,337 psi | 71% | 2936 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,982 psi | 87% | 3156 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,080 psi | 79% | 2999 fps | 96.9% |
| Bofors RP3 | <<locked>> | 84% | 52,533 psi | 86% | 2963 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,547 psi | 86% | 3081 fps | 97.9% |
| Bofors RP7 | <<locked>> | 88% | 52,112 psi | 86% | 2943 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 84% | 52,953 psi | 87% | 2976 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,708 psi | 88% | 3048 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 53,534 psi | 88% | 3005 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 53,809 psi | 88% | 3025 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,547 psi | 86% | 2979 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,143 psi | 89% | 3015 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,693 psi | 88% | 3084 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 60% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,897 psi | 90% | 2979 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,099 psi | 89% | 2959 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,156 psi | 87% | 2936 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 52,997 psi | 87% | 2976 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,882 psi | 88% | 2976 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 52,098 psi | 86% | 2989 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,432 psi | 88% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,098 psi | 86% | 2959 fps | 95.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,155 psi | 84% | 3051 fps | 96.1% |
| Lovex S062 | <<locked>> | 84% | 54,201 psi | 89% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,867 psi | 88% | 2969 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,013 psi | 90% | 3012 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,772 psi | 72% | 2838 fps | 98.2% |
| Norma 203B | <<locked>> | 84% | 54,737 psi | 90% | 3005 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,679 psi | 88% | 3028 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 52,112 psi | 86% | 3110 fps | 99% |
| Norma URP | <<locked>> | 92% | 53,664 psi | 88% | 3035 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,996 psi | 85% | 2979 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,416 psi | 84% | 3064 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 92% | 52,634 psi | 86% | 3035 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,919 psi | 75% | 2936 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,912 psi | 61% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,982 psi | 87% | 2959 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,721 psi | 87% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,810 psi | 90% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,563 psi | 88% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,163 psi | 69% | 2946 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 52,895 psi | 87% | 2913 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,823 psi | 87% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,273 psi | 89% | 3005 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 98% | 54,578 psi | 90% | 3068 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 52,112 psi | 86% | 2943 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,867 psi | 88% | 2969 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 54,201 psi | 89% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,013 psi | 90% | 3012 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,259 psi | 89% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,853 psi | 88% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,461 psi | 88% | 2920 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,099 psi | 89% | 3061 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 52,678 psi | 86% | 2956 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 52,823 psi | 87% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 51,692 psi | 85% | 2982 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 53,229 psi | 87% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,476 psi | 88% | 2890 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,128 psi | 89% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,446 psi | 86% | 2976 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,039 psi | 84% | 2956 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 54,955 psi | 90% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,013 psi | 90% | 3035 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 52,011 psi | 85% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,533 psi | 86% | 3094 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,025 psi | 85% | 2943 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,708 psi | 88% | 3048 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,715 psi | 73% | 3071 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,561 psi | 85% | 2972 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 2495 | <<locked>> | 80% | 50,662 psi | 83% | 2838 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,399 psi | 79% | 2838 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,085 psi | 58% | 2648 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 48,008 psi | 79% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,405 psi | 60% | 2700 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 51,053 psi | 84% | 3071 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 45,281 psi | 74% | 2815 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,163 psi | 71% | 2851 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 50,372 psi | 83% | 3022 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,024 psi | 82% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,279 psi | 71% | 2854 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,730 psi | 75% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,863 psi | 80% | 2913 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,549 psi | 58% | 2707 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,306 psi | 66% | 2841 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,786 psi | 70% | 2848 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,975 psi | 71% | 2897 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,092 psi | 43% | 2451 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,504 psi | 55% | 2687 fps | 95.6% |
| Alliant Reloder-26 | 68.4 gr | 84% | 31,850 psi | 52% | 2687 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 42,235 psi | 69% | 2877 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,093 psi | 76% | 2854 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,975 psi | 71% | 2897 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,625 psi | 67% | 2717 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,383 psi | 76% | 2864 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,392 psi | 63% | 2746 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,394 psi | 68% | 2769 fps | 95.2% |
| Hodgdon H4831 | <<locked>> | 96% | 50,357 psi | 83% | 2966 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,069 psi | 54% | 2598 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,560 psi | 83% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,176 psi | 66% | 2818 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 44% | 1677 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,561 psi | 85% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,601 psi | 78% | 2851 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,951 psi | 82% | 2881 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 38,711 psi | 64% | 2697 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,047 psi | 69% | 2749 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,041 psi | 58% | 2651 fps | 97.5% |
| IMR 4895 | <<locked>> | 80% | 50,111 psi | 82% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,994 psi | 80% | 2904 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 47,950 psi | 79% | 2989 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 47,979 psi | 79% | 2851 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,581 psi | 65% | 2700 fps | 97.4% |
| Lovex S070 | <<locked>> | 80% | 37,855 psi | 62% | 2677 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,852 psi | 56% | 2618 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 48,240 psi | 79% | 2900 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,772 psi | 72% | 2844 fps | 95.4% |
| Norma MRP | 69.6 gr | 88% | 36,869 psi | 61% | 2785 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,361 psi | 60% | 2697 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,617 psi | 80% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,790 psi | 78% | 2995 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,201 psi | 58% | 2677 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 96% | 39,697 psi | 65% | 2802 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 45% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,586 psi | 76% | 2848 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,859 psi | 70% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,100 psi | 59% | 2713 fps | 97.5% |
| ReloadSwiss RS 70 | 64.6 gr | 80% | 35,288 psi | 58% | 2720 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,363 psi | 65% | 2874 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 49,617 psi | 81% | 2861 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,410 psi | 71% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,718 psi | 78% | 2887 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 41,843 psi | 69% | 2828 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,625 psi | 67% | 2717 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,581 psi | 65% | 2700 fps | 97.4% |
| Shooters World Precision | <<locked>> | 80% | 47,979 psi | 79% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,855 psi | 62% | 2677 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,469 psi | 73% | 2851 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,730 psi | 73% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,667 psi | 63% | 2638 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,452 psi | 68% | 2822 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 43,714 psi | 72% | 2795 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,779 psi | 54% | 2651 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,798 psi | 65% | 2753 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 49,835 psi | 82% | 2825 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,227 psi | 82% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,800 psi | 69% | 2726 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,666 psi | 62% | 2694 fps | 98% |
| Vihtavuori N165 | <<locked>> | 94% | 41,756 psi | 69% | 2785 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,370 psi | 79% | 2831 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,115 psi | 61% | 2694 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,514 psi | 47% | 2530 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 49,023 psi | 80% | 3028 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,840 psi | 60% | 2661 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,566 psi | 63% | 2749 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,194 psi | 43% | 2536 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,945 psi | 69% | 2792 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 87 powders for .300 Blaser Mag. loaded with the .308 | 165gr | RWS Speed Tip Professional. Alliant Reloder-26 delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,156 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 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, Accurate MAGPRO, ADI AR 2213 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, ReloadSwiss RS 70 rank at the top here: for .300 Blaser Mag. with the .308 | 165gr | RWS Speed Tip Professional 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.