Load Specifications
Load data in caliber 7 mm Blaser Mag. with .277 | 140gr | Federal Trophy Bonded bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 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.
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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 2700 | <<locked>> | 82% | 54,041 psi | 89% | 2966 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 52,649 psi | 86% | 3018 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 53,635 psi | 88% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,360 psi | 89% | 3068 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 54,534 psi | 90% | 3163 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 53,548 psi | 88% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 51,866 psi | 85% | 3054 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 53,156 psi | 87% | 3110 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 51,924 psi | 85% | 3051 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,288 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,491 psi | 89% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 51,605 psi | 85% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,750 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,795 psi | 90% | 3104 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,344 psi | 86% | 3107 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,736 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,818 psi | 75% | 3018 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,939 psi | 87% | 3179 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,285 psi | 84% | 3087 fps | 98% |
| Bofors RP3 | <<locked>> | 82% | 51,692 psi | 85% | 2976 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,344 psi | 86% | 3107 fps | 98.3% |
| Bofors RP7 | <<locked>> | 88% | 54,636 psi | 90% | 3018 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 51,967 psi | 85% | 2992 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,852 psi | 87% | 3064 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 52,794 psi | 87% | 3025 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 53,142 psi | 87% | 3048 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 52,069 psi | 85% | 3028 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,185 psi | 86% | 2995 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,947 psi | 74% | 3054 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 88% | 53,084 psi | 87% | 3100 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 60% | 1909 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,997 psi | 87% | 2972 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,257 psi | 86% | 2995 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,736 psi | 87% | 2989 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 54,969 psi | 90% | 3061 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,694 psi | 90% | 3038 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,215 psi | 89% | 3143 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 53,272 psi | 87% | 2966 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,069 psi | 87% | 2989 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 54,404 psi | 89% | 3035 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,659 psi | 77% | 2917 fps | 99% |
| Norma 203B | <<locked>> | 82% | 53,824 psi | 88% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,779 psi | 87% | 3045 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 51,692 psi | 85% | 3130 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 53,229 psi | 87% | 3054 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,534 psi | 90% | 3045 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,795 psi | 90% | 3163 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 90% | 51,924 psi | 85% | 3051 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,023 psi | 80% | 3028 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 61% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,069 psi | 85% | 2976 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,243 psi | 86% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,215 psi | 89% | 3091 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,750 psi | 87% | 3120 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,092 psi | 74% | 3051 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,056 psi | 90% | 2976 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 52,054 psi | 85% | 2976 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,403 psi | 88% | 3025 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 54,027 psi | 89% | 3091 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,636 psi | 90% | 3018 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,069 psi | 87% | 2989 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 53,272 psi | 87% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,404 psi | 89% | 3035 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,272 psi | 87% | 3031 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,866 psi | 87% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,533 psi | 86% | 2936 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,563 psi | 88% | 3084 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 51,866 psi | 85% | 2969 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 51,793 psi | 85% | 2959 fps | 96% |
| Somchem S365 | <<locked>> | 92% | 52,736 psi | 87% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,752 psi | 90% | 3064 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 53,113 psi | 87% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,100 psi | 90% | 3045 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,027 psi | 89% | 3035 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 53,896 psi | 88% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,491 psi | 89% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 51,808 psi | 85% | 3061 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,996 psi | 85% | 3120 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,868 psi | 90% | 3009 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,127 psi | 87% | 3068 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,225 psi | 79% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,940 psi | 90% | 3058 fps | 98.4% |
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 2700 | <<locked>> | 80% | 50,618 psi | 83% | 2910 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,634 psi | 54% | 2612 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 50,372 psi | 83% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,696 psi | 64% | 2776 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 50,879 psi | 84% | 3097 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 47,355 psi | 78% | 2884 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,685 psi | 70% | 2874 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 46,340 psi | 76% | 2976 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 42,801 psi | 70% | 2874 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,993 psi | 79% | 2907 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,256 psi | 84% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,536 psi | 62% | 2785 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,569 psi | 70% | 2913 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,337 psi | 70% | 2867 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,929 psi | 66% | 2858 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,572 psi | 45% | 2526 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,328 psi | 51% | 2654 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 29,399 psi | 48% | 2638 fps | 95.1% |
| Bofors RP15 | <<locked>> | 94% | 42,163 psi | 69% | 2907 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 48,544 psi | 80% | 2923 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,929 psi | 66% | 2858 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,540 psi | 70% | 2789 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,602 psi | 80% | 2933 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,538 psi | 67% | 2822 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 43,482 psi | 71% | 2844 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 49,574 psi | 81% | 2986 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,588 psi | 80% | 2966 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,998 psi | 57% | 2671 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,523 psi | 65% | 2920 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 39,581 psi | 65% | 2835 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,369 psi | 45% | 1709 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,821 psi | 82% | 2920 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 38,159 psi | 63% | 2710 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,801 psi | 72% | 2818 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 37,043 psi | 61% | 2723 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,443 psi | 80% | 2927 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 47,427 psi | 78% | 3012 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 50,053 psi | 82% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,408 psi | 68% | 2766 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,668 psi | 65% | 2749 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,794 psi | 55% | 2641 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,618 psi | 83% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,018 psi | 71% | 2858 fps | 95.7% |
| Norma MRP | 60.8 gr | 86% | 36,608 psi | 60% | 2808 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,334 psi | 63% | 2769 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 51,024 psi | 84% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,208 psi | 73% | 2959 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,072 psi | 61% | 2749 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,320 psi | 65% | 2825 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 46% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,530 psi | 80% | 2913 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,194 psi | 74% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,435 psi | 63% | 2792 fps | 98.5% |
| ReloadSwiss RS 70 | 57.7 gr | 80% | 37,188 psi | 61% | 2799 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,419 psi | 60% | 2831 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,793 psi | 85% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,629 psi | 75% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,137 psi | 77% | 2910 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,336 psi | 68% | 2844 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,540 psi | 70% | 2789 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,408 psi | 68% | 2766 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,053 psi | 82% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,668 psi | 65% | 2749 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,673 psi | 77% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,615 psi | 77% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,582 psi | 67% | 2710 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,944 psi | 67% | 2841 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 45,832 psi | 75% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,327 psi | 79% | 2897 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,824 psi | 57% | 2723 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,898 psi | 61% | 2713 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 43,816 psi | 72% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,769 psi | 65% | 2766 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,711 psi | 64% | 2743 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,502 psi | 83% | 2890 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,073 psi | 64% | 2766 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,443 psi | 50% | 2608 fps | 96.9% |
| Vihtavuori N560 | 66.4 gr | 94% | 48,544 psi | 80% | 3051 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,841 psi | 64% | 2733 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,538 psi | 67% | 2822 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,337 psi | 40% | 2490 fps | 95.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,423 psi | 68% | 2812 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 82 powders for 7 mm Blaser Mag. loaded with the .277 | 140gr | Federal Trophy Bonded. Alliant Reloder-26 delivers the highest muzzle velocity at 3,179 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,179 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 82 of the 82 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 140.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for 7 mm Blaser Mag. with the .277 | 140gr | Federal Trophy Bonded 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.