Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 127gr | Lehigh Defense Controlled Chaos bullet and 89 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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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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 2495 | <<locked>> | 82% | 57,029 psi | 89% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,360 psi | 85% | 3061 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,029 psi | 89% | 3173 fps | 99.9% |
| Accurate 4064 | <<locked>> | 84% | 57,435 psi | 90% | 3104 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,955 psi | 86% | 3169 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 55,419 psi | 87% | 3268 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 86% | 57,276 psi | 90% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,912 psi | 88% | 3215 fps | 98.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,421 psi | 90% | 3271 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,985 psi | 89% | 3274 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,650 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,853 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,811 psi | 87% | 3232 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 57,232 psi | 90% | 3255 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,448 psi | 87% | 3202 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3268 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,490 psi | 84% | 3189 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,427 psi | 73% | 3114 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,606 psi | 84% | 3278 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,750 psi | 81% | 3182 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,724 psi | 87% | 3127 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 3268 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 55,056 psi | 86% | 3114 fps | 99% |
| Hodgdon H380 | <<locked>> | 84% | 55,956 psi | 88% | 3146 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 57,101 psi | 89% | 3225 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 56,565 psi | 89% | 3179 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 98% | 57,653 psi | 90% | 3212 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 56,260 psi | 88% | 3189 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 56,188 psi | 88% | 3146 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 57,363 psi | 90% | 3186 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,353 psi | 71% | 3150 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 90% | 57,653 psi | 90% | 3264 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1978 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,580 psi | 90% | 3143 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,710 psi | 89% | 3120 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,825 psi | 87% | 3104 fps | 99.4% |
| IMR 4350 | <<locked>> | 92% | 56,028 psi | 88% | 3150 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,695 psi | 89% | 3143 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 55,492 psi | 87% | 3159 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,318 psi | 88% | 3166 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 55,245 psi | 87% | 3136 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3245 fps | 97.4% |
| Lovex S062 | <<locked>> | 84% | 56,985 psi | 89% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,826 psi | 89% | 3140 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 54,853 psi | 86% | 3130 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,224 psi | 74% | 3012 fps | 99% |
| Norma 203B | <<locked>> | 82% | 54,186 psi | 85% | 3120 fps | 100% |
| Norma 204 | <<locked>> | 92% | 57,145 psi | 90% | 3209 fps | 98.5% |
| Norma MRP | <<locked>> | 98% | 56,333 psi | 88% | 3294 fps | 99.6% |
| Norma URP | <<locked>> | 92% | 57,276 psi | 90% | 3209 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 55,013 psi | 86% | 3143 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,361 psi | 87% | 3261 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 56,115 psi | 88% | 3209 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,603 psi | 78% | 3123 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 58% | 2028 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,970 psi | 88% | 3130 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,652 psi | 89% | 3245 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,868 psi | 86% | 3189 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,188 psi | 90% | 3281 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,614 psi | 71% | 3146 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 55,405 psi | 87% | 3074 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,854 psi | 88% | 3123 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,682 psi | 90% | 3186 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 54,665 psi | 86% | 3189 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 55,056 psi | 86% | 3114 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,826 psi | 89% | 3140 fps | 99.9% |
| Shooters World Precision | <<locked>> | 84% | 56,985 psi | 89% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,853 psi | 86% | 3130 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,406 psi | 90% | 3186 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,594 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,637 psi | 89% | 3091 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,230 psi | 85% | 3182 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 55,767 psi | 87% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,927 psi | 88% | 3114 fps | 96.8% |
| Somchem S365 | <<locked>> | 94% | 57,000 psi | 89% | 3209 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,376 psi | 87% | 3163 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 55,869 psi | 88% | 3028 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,028 psi | 88% | 3041 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 57,000 psi | 89% | 3087 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,637 psi | 87% | 3143 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3133 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 54,273 psi | 85% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,781 psi | 86% | 3150 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,941 psi | 88% | 3215 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 56,463 psi | 88% | 3284 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,259 psi | 87% | 3100 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,392 psi | 90% | 3228 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,226 psi | 77% | 3261 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,361 psi | 87% | 3153 fps | 98.4% |
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 2495 | <<locked>> | 80% | 53,505 psi | 84% | 2992 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,952 psi | 80% | 3002 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,953 psi | 52% | 2694 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,720 psi | 79% | 3002 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,986 psi | 61% | 2864 fps | 98.7% |
| Accurate MAGPRO | <<locked>> | 96% | 51,634 psi | 81% | 3196 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 47,645 psi | 75% | 2976 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,859 psi | 67% | 2963 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,847 psi | 73% | 3071 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,142 psi | 83% | 3212 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,283 psi | 76% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,561 psi | 81% | 3077 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,753 psi | 59% | 2874 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,946 psi | 67% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,743 psi | 67% | 2956 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 40,379 psi | 63% | 2949 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,760 psi | 44% | 2605 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,649 psi | 53% | 2799 fps | 96.1% |
| Alliant Reloder-26 | 58 gr | 80% | 29,704 psi | 47% | 2720 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 42,467 psi | 67% | 2995 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,878 psi | 77% | 3018 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 40,379 psi | 63% | 2949 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,772 psi | 67% | 2877 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 48,936 psi | 77% | 3025 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,872 psi | 64% | 2913 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,758 psi | 69% | 2936 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 50,154 psi | 79% | 3081 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 49,168 psi | 77% | 3061 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,273 psi | 55% | 2756 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,664 psi | 84% | 3127 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,813 psi | 62% | 3009 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 39,755 psi | 62% | 2920 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 43% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,128 psi | 85% | 3087 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,067 psi | 78% | 3012 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,301 psi | 82% | 3045 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 38,406 psi | 60% | 2799 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,063 psi | 69% | 2910 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 37,318 psi | 58% | 2808 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 52,910 psi | 83% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,660 psi | 76% | 3015 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 47,964 psi | 75% | 3110 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 50,372 psi | 79% | 3009 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,684 psi | 65% | 2858 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,958 psi | 63% | 2838 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 34,142 psi | 54% | 2726 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,923 psi | 80% | 3064 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,410 psi | 68% | 2953 fps | 95.6% |
| Norma MRP | 60.5 gr | 86% | 36,854 psi | 58% | 2894 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 38,653 psi | 61% | 2854 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,445 psi | 81% | 3087 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 44,541 psi | 70% | 3048 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,420 psi | 59% | 2838 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,668 psi | 62% | 2913 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,717 psi | 43% | 1811 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,863 psi | 77% | 3005 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,585 psi | 71% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,798 psi | 61% | 2881 fps | 98.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,507 psi | 59% | 2890 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,767 psi | 58% | 2920 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 52,069 psi | 82% | 3018 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,919 psi | 72% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,572 psi | 75% | 3005 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 88% | 41,742 psi | 65% | 2936 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 42,772 psi | 67% | 2877 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,684 psi | 65% | 2858 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 50,372 psi | 79% | 3009 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,958 psi | 63% | 2838 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,021 psi | 74% | 3012 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,818 psi | 73% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,814 psi | 64% | 2795 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,365 psi | 65% | 2930 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 46,093 psi | 72% | 2956 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,878 psi | 77% | 2992 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,143 psi | 55% | 2812 fps | 99.8% |
| Somchem S385 | <<locked>> | 84% | 37,246 psi | 58% | 2799 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 52,417 psi | 82% | 2979 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,692 psi | 83% | 2992 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,077 psi | 69% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,059 psi | 63% | 2854 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 39,131 psi | 61% | 2831 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,836 psi | 80% | 2986 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,421 psi | 62% | 2854 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,676 psi | 48% | 2687 fps | 96.7% |
| Vihtavuori N560 | 66.2 gr | 94% | 49,226 psi | 77% | 3153 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,175 psi | 61% | 2818 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,872 psi | 64% | 2913 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,540 psi | 38% | 2566 fps | 95.2% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,858 psi | 66% | 2900 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 89 powders for .270 Weath. Mag. loaded with the .277 | 127gr | Lehigh Defense Controlled Chaos. Norma MRP delivers the highest muzzle velocity at 3,294 fps; across all powders the maximum-charge window runs from 1,978 fps to 3,294 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 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 127.0 gr projectile in 0.277" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .270 Weath. Mag. with the .277 | 127gr | Lehigh Defense Controlled Chaos 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.