Load Specifications
Load data in caliber .270 WSM with .277 | 130gr | NorthFork Bonded Core bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Vihtavuori N560.
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>> | 96% | 57,551 psi | 90% | 3071 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,347 psi | 87% | 3061 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 57,609 psi | 90% | 3209 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 94% | 54,694 psi | 86% | 3140 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 82% | 55,608 psi | 87% | 3005 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,592 psi | 86% | 3084 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 96% | 55,927 psi | 88% | 3136 fps | 97.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,033 psi | 67% | 2933 fps | 97.5% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,882 psi | 86% | 3081 fps | 98.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,882 psi | 86% | 3081 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 57,479 psi | 90% | 3041 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,563 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,796 psi | 87% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,317 psi | 85% | 3074 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 55,912 psi | 88% | 3146 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 56,782 psi | 89% | 3127 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 52,634 psi | 82% | 3120 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 57,392 psi | 90% | 3225 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 54,926 psi | 86% | 3127 fps | 98.2% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,139 psi | 77% | 3051 fps | 96.5% |
| Bofors RP5 | <<locked>> | 96% | 55,912 psi | 88% | 3146 fps | 98.5% |
| Bofors RP7 | <<locked>> | 86% | 57,479 psi | 90% | 3048 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,054 psi | 82% | 3058 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 86% | 55,999 psi | 88% | 3094 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 84% | 55,114 psi | 86% | 3048 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 94% | 56,115 psi | 88% | 3077 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,042 psi | 86% | 3061 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 55,361 psi | 87% | 3025 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 51,837 psi | 81% | 3176 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 86% | 56,043 psi | 88% | 3130 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 58% | 1932 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,781 psi | 86% | 3018 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,911 psi | 86% | 3009 fps | 99.1% |
| IMR 4831 | <<locked>> | 88% | 55,274 psi | 87% | 3045 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 57,145 psi | 90% | 3061 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 57,159 psi | 90% | 3173 fps | 97.5% |
| Lovex S065 | <<locked>> | 86% | 56,260 psi | 88% | 3022 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 57,682 psi | 90% | 3064 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,187 psi | 86% | 3035 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 55,593 psi | 87% | 3074 fps | 98.1% |
| Norma MRP | <<locked>> | 94% | 55,622 psi | 87% | 3173 fps | 99.4% |
| Norma URP | <<locked>> | 88% | 56,434 psi | 88% | 3084 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 54,447 psi | 85% | 3136 fps | 97.4% |
| Ramshot Hunter | <<locked>> | 88% | 55,172 psi | 86% | 3084 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3133 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,218 psi | 60% | 1982 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 55,085 psi | 86% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,694 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 55,695 psi | 87% | 3150 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,286 psi | 82% | 3173 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 82% | 55,941 psi | 88% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 56,246 psi | 88% | 3054 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 94% | 57,479 psi | 90% | 3123 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 57,479 psi | 90% | 3048 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,260 psi | 88% | 3022 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 57,682 psi | 90% | 3064 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,086 psi | 88% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,129 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,666 psi | 87% | 2969 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 57,000 psi | 89% | 3120 fps | 98.6% |
| Somchem S355 | <<locked>> | 82% | 55,390 psi | 87% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,462 psi | 85% | 2986 fps | 96.2% |
| Somchem S365 | <<locked>> | 90% | 56,710 psi | 89% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,027 psi | 86% | 3045 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 84% | 56,159 psi | 88% | 2969 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,795 psi | 86% | 3022 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 57,566 psi | 90% | 3071 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 57,566 psi | 90% | 3081 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 56,811 psi | 89% | 3117 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 55,477 psi | 87% | 3156 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3136 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 57,276 psi | 90% | 3028 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 56,217 psi | 88% | 3100 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3271 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,288 psi | 85% | 3028 fps | 98% |
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% | 35,636 psi | 56% | 2644 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 46,122 psi | 72% | 2894 fps | 99.6% |
| Accurate High Country | <<locked>> | 88% | 47,529 psi | 74% | 3022 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 92% | 51,256 psi | 80% | 3077 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 52,475 psi | 82% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 42,960 psi | 67% | 2851 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 92% | 49,385 psi | 77% | 3015 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 96% | 38,363 psi | 60% | 2815 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 43,352 psi | 68% | 2858 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 43,352 psi | 68% | 2858 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 54,085 psi | 85% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,004 psi | 67% | 2884 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,936 psi | 77% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 42,917 psi | 67% | 2851 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,307 psi | 65% | 2854 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,518 psi | 53% | 2661 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,257 psi | 52% | 2671 fps | 95.5% |
| Alliant Reloder-26 | 57.5 gr | 80% | 36,027 psi | 56% | 2792 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 43,410 psi | 68% | 2904 fps | 95.5% |
| Bofors RP30 | <<locked>> | 98% | 46,325 psi | 73% | 2995 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 41,307 psi | 65% | 2854 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 48,225 psi | 76% | 2881 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 96% | 45,788 psi | 72% | 2930 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 46,659 psi | 73% | 2923 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 48,936 psi | 77% | 2933 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 90% | 49,559 psi | 78% | 2959 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,663 psi | 81% | 3002 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,234 psi | 65% | 2776 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 40,901 psi | 64% | 2920 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 45,600 psi | 71% | 2940 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,050 psi | 44% | 1729 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,482 psi | 68% | 2802 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,023 psi | 77% | 2900 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 43,685 psi | 68% | 2835 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 90% | 50,981 psi | 80% | 2953 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 92% | 47,616 psi | 75% | 2992 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 47,558 psi | 75% | 2864 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 45,861 psi | 72% | 2851 fps | 98% |
| Lovex S071 | <<locked>> | 82% | 33,243 psi | 52% | 2579 fps | 95% |
| Norma 204 | <<locked>> | 80% | 43,395 psi | 68% | 2841 fps | 95.3% |
| Norma MRP | 57.2 gr | 82% | 38,101 psi | 60% | 2808 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 44,483 psi | 70% | 2867 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 47,718 psi | 75% | 3005 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,265 psi | 68% | 2858 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 40,524 psi | 64% | 2822 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,805 psi | 45% | 1772 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 51,634 psi | 81% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,324 psi | 71% | 2907 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,062 psi | 67% | 2907 fps | 98.9% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,101 psi | 60% | 2841 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 52,620 psi | 82% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 47,007 psi | 74% | 2884 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 84% | 42,525 psi | 67% | 2838 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 48,225 psi | 76% | 2881 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,558 psi | 75% | 2864 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 45,861 psi | 72% | 2851 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 52,924 psi | 83% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,953 psi | 81% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,456 psi | 73% | 2802 fps | 97.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,192 psi | 66% | 2835 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 52,373 psi | 82% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 51,329 psi | 80% | 2930 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 41,466 psi | 65% | 2835 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,653 psi | 61% | 2717 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 49,835 psi | 78% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,759 psi | 72% | 2861 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 40,045 psi | 63% | 2743 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 45,498 psi | 71% | 2871 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 37,594 psi | 59% | 2749 fps | 98.7% |
| Vihtavuori N560 | 62.8 gr | 90% | 48,892 psi | 77% | 3031 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 96% | 49,342 psi | 77% | 3022 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,541 psi | 70% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,833 psi | 73% | 2927 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,385 psi | 48% | 2677 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,163 psi | 66% | 2799 fps | 95.1% |
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 75 powders for .270 WSM loaded with the .277 | 130gr | NorthFork Bonded Core. Winchester StaBALL HD delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,271 fps. ADI AR 2225 gives the best case fill at 100 %, and 75 of the 75 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 130.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP30 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, Alliant Reloder-26, Vihtavuori N560 rank at the top here: for .270 WSM with the .277 | 130gr | NorthFork Bonded Core 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.