Load Specifications
Load data in caliber .270 WSM with .277 | 170gr | Nosler Ballistic Tip Hunting bullet and 71 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Accurate MAGPRO.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 90% | 55,622 psi | 87% | 2677 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 56,594 psi | 89% | 2697 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 56,507 psi | 89% | 2815 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 55,405 psi | 87% | 2740 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 92% | 56,956 psi | 89% | 2802 fps | 99.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2772 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,835 psi | 78% | 2749 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,825 psi | 87% | 2736 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,825 psi | 87% | 2736 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 56,028 psi | 88% | 2736 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 55,245 psi | 87% | 2730 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 57,609 psi | 90% | 2805 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 55,680 psi | 87% | 2726 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,534 psi | 85% | 2785 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,999 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2802 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,609 psi | 90% | 2756 fps | 97.4% |
| Bofors RP15 | <<locked>> | 94% | 56,811 psi | 89% | 2795 fps | 99.8% |
| Bofors RP30 | <<locked>> | 98% | 54,781 psi | 86% | 2795 fps | 99.5% |
| Bofors RP5 | <<locked>> | 92% | 57,609 psi | 90% | 2805 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 57,261 psi | 90% | 2680 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,333 psi | 88% | 2792 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 56,666 psi | 89% | 2736 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,840 psi | 89% | 2743 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,724 psi | 87% | 2726 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 56,492 psi | 89% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,101 psi | 89% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,811 psi | 89% | 2772 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 59% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 55,143 psi | 86% | 2667 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 56,202 psi | 88% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 57,580 psi | 90% | 2720 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 92% | 55,143 psi | 86% | 2785 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 45,992 psi | 72% | 2674 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 56,463 psi | 88% | 2657 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 54,766 psi | 86% | 2654 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 56,942 psi | 89% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 84% | 56,188 psi | 88% | 2726 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2703 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 57,682 psi | 90% | 2828 fps | 100% |
| Norma URP | <<locked>> | 84% | 57,508 psi | 90% | 2720 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,999 psi | 88% | 2808 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 56,144 psi | 88% | 2730 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,462 psi | 85% | 2749 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 61% | 1722 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 55,709 psi | 87% | 2713 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,927 psi | 89% | 2785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,667 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 56,956 psi | 89% | 2874 fps | 99% |
| Rottweil R 904 | <<locked>> | 88% | 56,753 psi | 89% | 2710 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 88% | 55,245 psi | 87% | 2726 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 57,261 psi | 90% | 2680 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 56,463 psi | 88% | 2657 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 54,766 psi | 86% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 55,347 psi | 87% | 2612 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 54,810 psi | 86% | 2723 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 54,752 psi | 86% | 2654 fps | 98.6% |
| Somchem S365 | <<locked>> | 84% | 54,737 psi | 86% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 55,985 psi | 88% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 55,564 psi | 87% | 2661 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 55,347 psi | 87% | 2684 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 54,940 psi | 86% | 2671 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 55,405 psi | 87% | 2713 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 57,159 psi | 90% | 2825 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 94% | 54,447 psi | 85% | 2762 fps | 99% |
| Vihtavuori N568 | <<locked>> | 98% | 54,128 psi | 85% | 2815 fps | 98.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,766 psi | 86% | 2864 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,667 psi | 90% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 56,927 psi | 89% | 2740 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,203 psi | 90% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 55,288 psi | 87% | 2694 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,437 psi | 65% | 2448 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 53,200 psi | 83% | 2648 fps | 100% |
| Accurate MAGPRO | 53.5 gr | 80% | 41,249 psi | 65% | 2543 fps | 95.4% |
| ADI AR 2209 | <<locked>> | 80% | 43,511 psi | 68% | 2536 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 39,552 psi | 62% | 2484 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 88% | 38,377 psi | 60% | 2457 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 82% | 30,095 psi | 47% | 2297 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,121 psi | 69% | 2539 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,121 psi | 69% | 2539 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 49,603 psi | 78% | 2641 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 43,729 psi | 69% | 2533 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,205 psi | 63% | 2500 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 38,986 psi | 61% | 2457 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,171 psi | 54% | 2398 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 42,873 psi | 67% | 2608 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 48,762 psi | 76% | 2743 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 48,762 psi | 76% | 2605 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,739 psi | 59% | 2448 fps | 96.8% |
| Bofors RP30 | <<locked>> | 84% | 36,027 psi | 56% | 2441 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 40,205 psi | 63% | 2500 fps | 97.6% |
| Bofors RP7 | <<locked>> | 80% | 54,157 psi | 85% | 2635 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 82% | 34,809 psi | 55% | 2375 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 53,316 psi | 84% | 2684 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 41,843 psi | 66% | 2484 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,234 psi | 65% | 2470 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 47,543 psi | 75% | 2533 fps | 100% |
| Hodgdon Retumbo | 50.6 gr | 80% | 33,576 psi | 53% | 2425 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 53,142 psi | 83% | 2717 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,631 psi | 45% | 1506 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 49,095 psi | 77% | 2572 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 50,009 psi | 78% | 2592 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,091 psi | 68% | 2474 fps | 96.6% |
| IMR 7828 SSC | <<locked>> | 80% | 38,276 psi | 60% | 2467 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 36,622 psi | 57% | 2477 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 53,200 psi | 83% | 2608 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 51,880 psi | 81% | 2612 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,579 psi | 57% | 2346 fps | 98.7% |
| Norma 204 | <<locked>> | 80% | 49,632 psi | 78% | 2621 fps | 99.1% |
| Norma 217 | <<locked>> | 86% | 31,212 psi | 49% | 2359 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 41,989 psi | 66% | 2566 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 51,097 psi | 80% | 2628 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,145 psi | 60% | 2477 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 49,748 psi | 78% | 2631 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,679 psi | 54% | 2379 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,341 psi | 46% | 1542 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 52,417 psi | 82% | 2667 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 49,908 psi | 78% | 2680 fps | 100% |
| ReloadSwiss RS 76 | 54.1 gr | 80% | 32,692 psi | 51% | 2405 fps | 96.9% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 41,017 psi | 64% | 2589 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 44,889 psi | 70% | 2510 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 43,511 psi | 68% | 2526 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 54,157 psi | 85% | 2635 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,200 psi | 83% | 2608 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 51,880 psi | 81% | 2612 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,127 psi | 82% | 2562 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,149 psi | 68% | 2523 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 45,745 psi | 72% | 2503 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 48,515 psi | 76% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,469 psi | 70% | 2513 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 52,228 psi | 82% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,783 psi | 61% | 2398 fps | 97.7% |
| Vihtavuori N550 | <<locked>> | 80% | 51,779 psi | 81% | 2625 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,845 psi | 69% | 2530 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 41,771 psi | 65% | 2549 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 82% | 38,130 psi | 60% | 2461 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 90% | 42,293 psi | 66% | 2598 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 98% | 51,488 psi | 81% | 2808 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 50,865 psi | 80% | 2569 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 53,592 psi | 84% | 2690 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 35,621 psi | 56% | 2516 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,640 psi | 64% | 2444 fps | 97.6% |
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 71 powders for .270 WSM loaded with the .277 | 170gr | Nosler Ballistic Tip Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 2,910 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,910 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.277" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Accurate MAGPRO rank at the top here: for .270 WSM with the .277 | 170gr | Nosler Ballistic Tip Hunting 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.