Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 156gr | Peregrine VRG-2 bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 and Norma MRP.
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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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,404 psi | 85% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 55,956 psi | 88% | 2904 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 57,334 psi | 90% | 3038 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 82% | 57,014 psi | 89% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 56,956 psi | 89% | 2969 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 94% | 54,665 psi | 86% | 2976 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 2874 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2835 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 57,188 psi | 90% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 54,433 psi | 85% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 56,521 psi | 89% | 2959 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,578 psi | 86% | 2969 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 55,912 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 55,071 psi | 86% | 2999 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 56,420 psi | 88% | 3031 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 56,434 psi | 88% | 2936 fps | 97.2% |
| Bofors RP15 | <<locked>> | 98% | 57,290 psi | 90% | 3009 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2943 fps | 99.1% |
| Bofors RP5 | <<locked>> | 94% | 54,578 psi | 86% | 2969 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 54,897 psi | 86% | 2854 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 54,128 psi | 85% | 2963 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 54,085 psi | 85% | 2907 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 56,985 psi | 89% | 2923 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 92% | 54,752 psi | 86% | 2913 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 57,232 psi | 90% | 2953 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 57,246 psi | 90% | 2881 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 54,128 psi | 85% | 3077 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 54,346 psi | 85% | 2943 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 58% | 1804 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 56,478 psi | 89% | 2894 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 84% | 56,536 psi | 89% | 2881 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 56,434 psi | 88% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 55,637 psi | 87% | 2894 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 96% | 56,434 psi | 88% | 3015 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 38,870 psi | 61% | 2730 fps | 96.3% |
| Lovex S065 | <<locked>> | 86% | 56,840 psi | 89% | 2874 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 55,158 psi | 86% | 2874 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,492 psi | 87% | 2887 fps | 100% |
| Norma 204 | <<locked>> | 88% | 57,667 psi | 90% | 2956 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 39,030 psi | 61% | 2756 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 54,476 psi | 85% | 2992 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,650 psi | 86% | 2890 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 57,348 psi | 90% | 3038 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 88% | 57,072 psi | 89% | 2953 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 55,593 psi | 87% | 2966 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 56,101 psi | 88% | 2930 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 54,491 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2959 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 56,159 psi | 88% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 54,433 psi | 85% | 2881 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 92% | 55,956 psi | 88% | 2946 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 84% | 54,897 psi | 86% | 2854 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,840 psi | 89% | 2874 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 55,158 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,912 psi | 88% | 2717 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 56,101 psi | 88% | 2828 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,521 psi | 87% | 2940 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 55,854 psi | 88% | 2844 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,999 psi | 88% | 2877 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 54,868 psi | 86% | 2890 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 56,449 psi | 88% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 84% | 57,029 psi | 89% | 2812 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 56,376 psi | 88% | 2881 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 55,985 psi | 88% | 2897 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 55,535 psi | 87% | 2887 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,462 psi | 85% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 54,375 psi | 85% | 2989 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 54,085 psi | 85% | 2969 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,633 psi | 79% | 2963 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 55,782 psi | 87% | 2835 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 54,331 psi | 85% | 2910 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 57,711 psi | 90% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 56,449 psi | 88% | 2913 fps | 99.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 33,591 psi | 53% | 2484 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 45,397 psi | 71% | 2740 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 42,975 psi | 67% | 2779 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 53,635 psi | 84% | 2812 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 37,985 psi | 60% | 2618 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 38,899 psi | 61% | 2667 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 37,318 psi | 58% | 2628 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 90% | 31,154 psi | 49% | 2523 fps | 96.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,801 psi | 69% | 2749 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,720 psi | 79% | 2864 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 38,000 psi | 60% | 2615 fps | 96.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 33,736 psi | 53% | 2552 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,401 psi | 51% | 2516 fps | 99.9% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,152 psi | 44% | 2425 fps | 96.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 35,505 psi | 56% | 2657 fps | 99.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 49,937 psi | 78% | 2822 fps | 95.7% |
| Bofors RP15 | <<locked>> | 82% | 33,649 psi | 53% | 2546 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 36,013 psi | 56% | 2641 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 33,736 psi | 53% | 2552 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 48,254 psi | 76% | 2743 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 35,563 psi | 56% | 2589 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 47,224 psi | 74% | 2792 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 49,922 psi | 78% | 2808 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 84% | 41,437 psi | 65% | 2674 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 40,814 psi | 64% | 2657 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,089 psi | 64% | 2628 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,620 psi | 53% | 2628 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 46,862 psi | 73% | 2818 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 43% | 1614 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,787 psi | 69% | 2680 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,850 psi | 78% | 2772 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 43,381 psi | 68% | 2687 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,553 psi | 64% | 2618 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 37,275 psi | 58% | 2644 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 36,390 psi | 57% | 2671 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 47,094 psi | 74% | 2717 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 45,426 psi | 71% | 2710 fps | 99.6% |
| Lovex S071 | <<locked>> | 80% | 28,892 psi | 45% | 2362 fps | 96.1% |
| Norma 204 | <<locked>> | 80% | 43,816 psi | 69% | 2717 fps | 98.1% |
| Norma 217 | <<locked>> | 94% | 31,821 psi | 50% | 2572 fps | 95.9% |
| Norma MRP | 56.8 gr | 80% | 35,331 psi | 55% | 2621 fps | 97.5% |
| Norma URP | <<locked>> | 80% | 44,686 psi | 70% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 36,753 psi | 58% | 2648 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 43,613 psi | 68% | 2726 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 32,663 psi | 51% | 2523 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,297 psi | 44% | 1654 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,455 psi | 71% | 2762 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,888 psi | 69% | 2782 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 30,458 psi | 48% | 2533 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,351 psi | 66% | 2815 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 52,431 psi | 82% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 39,291 psi | 62% | 2598 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 37,275 psi | 58% | 2598 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 48,254 psi | 76% | 2743 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,094 psi | 74% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 45,426 psi | 71% | 2710 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,794 psi | 83% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,064 psi | 72% | 2667 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,956 psi | 58% | 2592 fps | 96.6% |
| Somchem S355 | <<locked>> | 80% | 52,243 psi | 82% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 40,059 psi | 63% | 2589 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,669 psi | 65% | 2684 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,753 psi | 59% | 2579 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 50,067 psi | 78% | 2717 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,137 psi | 72% | 2723 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 32,634 psi | 51% | 2454 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 45,498 psi | 71% | 2726 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,274 psi | 57% | 2589 fps | 99.8% |
| Vihtavuori N560 | 59.6 gr | 84% | 40,973 psi | 64% | 2736 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 38,203 psi | 60% | 2664 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 43,932 psi | 69% | 2835 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,397 psi | 71% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,442 psi | 74% | 2795 fps | 99.7% |
| Winchester StaBALL HD | 56.2 gr | 80% | 28,703 psi | 45% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 34,548 psi | 54% | 2507 fps | 95.6% |
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 79 powders for .270 Weath. Mag. loaded with the .277 | 156gr | Peregrine VRG-2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,804 fps to 3,077 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for .270 Weath. Mag. with the .277 | 156gr | Peregrine VRG-2 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.