Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 140gr | Peregrine VLR-4 Compact bullet and 88 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Accurate High Country.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 56,434 psi | 88% | 2972 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 55,622 psi | 87% | 3028 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 55,680 psi | 87% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 57,609 psi | 90% | 3074 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,406 psi | 90% | 3192 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 96% | 54,288 psi | 85% | 3123 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 55,869 psi | 88% | 2989 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,853 psi | 86% | 3074 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 98% | 56,159 psi | 88% | 3130 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2835 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,911 psi | 86% | 3068 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,911 psi | 86% | 3068 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,782 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,927 psi | 89% | 3031 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,795 psi | 86% | 3081 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,028 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,172 psi | 85% | 3058 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,593 psi | 87% | 3123 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,478 psi | 89% | 3094 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,805 psi | 76% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,174 psi | 90% | 3196 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 3107 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 54,056 psi | 85% | 2969 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,657 psi | 70% | 2959 fps | 96.8% |
| Bofors RP5 | <<locked>> | 98% | 55,593 psi | 87% | 3123 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 56,884 psi | 89% | 3018 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,182 psi | 76% | 2979 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 54,346 psi | 85% | 2992 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,941 psi | 88% | 3077 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 86% | 55,230 psi | 87% | 3031 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 56,391 psi | 88% | 3071 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,259 psi | 87% | 3051 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,056 psi | 86% | 2995 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,703 psi | 75% | 3091 fps | 99% |
| Hodgdon Superformance | <<locked>> | 88% | 56,347 psi | 88% | 3117 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 57% | 1886 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,230 psi | 87% | 2966 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,781 psi | 86% | 3005 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,143 psi | 86% | 2992 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 54,259 psi | 85% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,508 psi | 90% | 3051 fps | 98.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,493 psi | 90% | 3166 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 55,390 psi | 87% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,506 psi | 87% | 2992 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 56,840 psi | 89% | 3035 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2930 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 56,231 psi | 88% | 3015 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,724 psi | 87% | 3061 fps | 99% |
| Norma MRP | <<locked>> | 96% | 55,521 psi | 87% | 3153 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,043 psi | 88% | 3058 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,450 psi | 90% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,331 psi | 85% | 3123 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 54,882 psi | 86% | 3061 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,489 psi | 82% | 3054 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,391 psi | 59% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,186 psi | 85% | 2979 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,448 psi | 87% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,606 psi | 84% | 3038 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 56,072 psi | 88% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,892 psi | 75% | 3084 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 82% | 57,421 psi | 90% | 2969 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 54,447 psi | 85% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,463 psi | 88% | 3045 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 96% | 57,319 psi | 90% | 3107 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 88% | 56,884 psi | 89% | 3018 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,506 psi | 87% | 2992 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 55,390 psi | 87% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,840 psi | 89% | 3035 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,130 psi | 88% | 3035 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,984 psi | 86% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,969 psi | 86% | 2943 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,840 psi | 89% | 3100 fps | 99.4% |
| Somchem S355 | <<locked>> | 86% | 57,653 psi | 90% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,302 psi | 85% | 2972 fps | 97.5% |
| Somchem S365 | <<locked>> | 92% | 56,086 psi | 88% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,027 psi | 85% | 3015 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 55,622 psi | 87% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,360 psi | 85% | 2995 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,450 psi | 90% | 3051 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 82% | 56,231 psi | 88% | 2933 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,276 psi | 90% | 3054 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,998 psi | 86% | 3071 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,579 psi | 87% | 3146 fps | 98.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 3048 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,056 psi | 85% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,941 psi | 88% | 3077 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,070 psi | 85% | 3012 fps | 98.9% |
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 2700 | <<locked>> | 80% | 52,750 psi | 83% | 2917 fps | 99.2% |
| Accurate 3100 | <<locked>> | 82% | 31,763 psi | 50% | 2556 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 52,243 psi | 82% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,538 psi | 64% | 2779 fps | 99.5% |
| Accurate High Country | 61.4 gr | 88% | 43,076 psi | 68% | 2927 fps | 95.9% |
| Accurate MAGPRO | 65.4 gr | 92% | 47,079 psi | 74% | 2992 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,284 psi | 77% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,262 psi | 62% | 2769 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 42,699 psi | 67% | 2874 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 96% | 33,750 psi | 53% | 2703 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,508 psi | 62% | 2769 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,508 psi | 62% | 2769 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,053 psi | 78% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,476 psi | 84% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,305 psi | 62% | 2792 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,107 psi | 71% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,102 psi | 61% | 2762 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,796 psi | 58% | 2753 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,703 psi | 45% | 2536 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,661 psi | 48% | 2612 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,966 psi | 49% | 2661 fps | 97% |
| Bofors RP15 | <<locked>> | 90% | 38,986 psi | 61% | 2802 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,662 psi | 79% | 2920 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,553 psi | 65% | 2894 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 36,796 psi | 58% | 2753 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 44,150 psi | 69% | 2792 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 41,916 psi | 66% | 2851 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 50,749 psi | 80% | 2933 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,612 psi | 67% | 2835 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,484 psi | 71% | 2858 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 45,745 psi | 72% | 2884 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 44,860 psi | 70% | 2864 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,753 psi | 58% | 2674 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,434 psi | 57% | 2815 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,684 psi | 65% | 2851 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,282 psi | 43% | 1690 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,822 psi | 81% | 2913 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,798 psi | 62% | 2720 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,585 psi | 71% | 2825 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 38,769 psi | 61% | 2726 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,599 psi | 70% | 2822 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 43,816 psi | 69% | 2910 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 52,025 psi | 82% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,989 psi | 67% | 2769 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,263 psi | 65% | 2753 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,111 psi | 49% | 2539 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,837 psi | 83% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,363 psi | 62% | 2749 fps | 95.5% |
| Norma MRP | <<locked>> | 82% | 33,460 psi | 52% | 2694 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 40,190 psi | 63% | 2776 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 53,693 psi | 84% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 40,582 psi | 64% | 2851 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,015 psi | 61% | 2762 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 35,911 psi | 56% | 2720 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,905 psi | 44% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,691 psi | 79% | 2917 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,921 psi | 75% | 2972 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,379 psi | 63% | 2799 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,117 psi | 61% | 2815 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,431 psi | 52% | 2726 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 53,896 psi | 84% | 2920 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,558 psi | 75% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,453 psi | 68% | 2808 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 38,043 psi | 60% | 2740 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,150 psi | 69% | 2792 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,989 psi | 67% | 2769 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 52,025 psi | 82% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,263 psi | 65% | 2753 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,979 psi | 77% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,559 psi | 76% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,119 psi | 66% | 2713 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,724 psi | 59% | 2736 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 47,659 psi | 75% | 2858 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,266 psi | 69% | 2792 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,811 psi | 58% | 2730 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,114 psi | 57% | 2664 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 45,643 psi | 72% | 2782 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,684 psi | 65% | 2772 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 35,737 psi | 56% | 2644 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 52,620 psi | 82% | 2881 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,901 psi | 64% | 2769 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 31,952 psi | 50% | 2615 fps | 98.2% |
| Vihtavuori N560 | 62.8 gr | 90% | 44,962 psi | 70% | 2949 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 96% | 44,237 psi | 69% | 2920 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,828 psi | 64% | 2736 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,612 psi | 67% | 2835 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,266 psi | 40% | 2516 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,014 psi | 60% | 2707 fps | 95.3% |
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 88 powders for .270 Weath. Mag. loaded with the .277 | 140gr | Peregrine VLR-4 Compact. Alliant Reloder-26 delivers the highest muzzle velocity at 3,196 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,196 fps. ADI AR 2225 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-23, 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. Vihtavuori N560, Accurate MAGPRO, Accurate High Country rank at the top here: for .270 Weath. Mag. with the .277 | 140gr | Peregrine VLR-4 Compact 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.