Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 130gr | Atomic 29 HP bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and ReloadSwiss RS 70.
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.
A valid access license is required to use the Personalized Load Calculator.
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% | 55,869 psi | 88% | 3061 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 54,810 psi | 86% | 3110 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,405 psi | 87% | 3041 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,797 psi | 89% | 3163 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,202 psi | 88% | 3268 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 57,188 psi | 90% | 3268 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 84% | 55,100 psi | 86% | 3077 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 57,551 psi | 90% | 3212 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 98% | 55,390 psi | 87% | 3212 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,203 psi | 60% | 2904 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,085 psi | 85% | 3150 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,085 psi | 85% | 3150 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,260 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,202 psi | 88% | 3123 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,290 psi | 90% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,868 psi | 86% | 3186 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,014 psi | 89% | 3202 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,737 psi | 86% | 3205 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,877 psi | 75% | 3114 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 55,883 psi | 88% | 3281 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3182 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 57,174 psi | 90% | 3117 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,737 psi | 86% | 3205 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 56,318 psi | 88% | 3107 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,543 psi | 75% | 3051 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 84% | 57,319 psi | 90% | 3140 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,998 psi | 86% | 3159 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,447 psi | 85% | 3117 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 55,332 psi | 87% | 3146 fps | 97% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,244 psi | 85% | 3127 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,696 psi | 90% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,007 psi | 74% | 3163 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 88% | 55,245 psi | 87% | 3196 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,535 psi | 57% | 1962 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,563 psi | 86% | 3058 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,000 psi | 89% | 3097 fps | 99.6% |
| IMR 4350 | <<locked>> | 92% | 57,551 psi | 90% | 3143 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,563 psi | 86% | 3081 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 56,927 psi | 89% | 3150 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,682 psi | 90% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,710 psi | 89% | 3133 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,521 psi | 89% | 3245 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,882 psi | 86% | 3048 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,708 psi | 86% | 3074 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,173 psi | 88% | 3123 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,849 psi | 77% | 3012 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 55,506 psi | 87% | 3107 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,926 psi | 86% | 3143 fps | 98.5% |
| Norma MRP | <<locked>> | 96% | 54,273 psi | 85% | 3232 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 55,158 psi | 86% | 3146 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,623 psi | 89% | 3136 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3268 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,114 psi | 85% | 3146 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,430 psi | 81% | 3130 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,362 psi | 59% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,246 psi | 90% | 3123 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,331 psi | 85% | 3176 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,637 psi | 89% | 3186 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,042 psi | 86% | 3219 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,253 psi | 74% | 3156 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 82% | 56,652 psi | 89% | 3061 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,290 psi | 90% | 3114 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,463 psi | 87% | 3120 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 96% | 56,376 psi | 88% | 3186 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 56,318 psi | 88% | 3107 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,708 psi | 86% | 3074 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,882 psi | 86% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,173 psi | 88% | 3123 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,376 psi | 87% | 3127 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,360 psi | 85% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,143 psi | 85% | 3022 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,898 psi | 88% | 3182 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 57,145 psi | 90% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,348 psi | 90% | 3114 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 54,955 psi | 86% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,014 psi | 89% | 3159 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 57,246 psi | 90% | 3015 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,334 psi | 90% | 3028 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,839 psi | 86% | 3025 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,261 psi | 90% | 3136 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,391 psi | 88% | 3133 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 55,521 psi | 87% | 3025 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,347 psi | 88% | 3143 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,259 psi | 85% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,375 psi | 85% | 3222 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 3120 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,855 psi | 89% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,998 psi | 86% | 3159 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3261 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,043 psi | 89% | 3153 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% | 52,083 psi | 82% | 2995 fps | 98.7% |
| Accurate 3100 | <<locked>> | 82% | 31,705 psi | 50% | 2635 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 52,083 psi | 82% | 2992 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,248 psi | 63% | 2864 fps | 99.1% |
| Accurate High Country | <<locked>> | 90% | 45,382 psi | 71% | 3064 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 49,545 psi | 78% | 3130 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,762 psi | 76% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,292 psi | 65% | 2900 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 92% | 45,049 psi | 71% | 3009 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 35,781 psi | 56% | 2831 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,684 psi | 65% | 2904 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,684 psi | 65% | 2904 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,545 psi | 78% | 2992 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,852 psi | 83% | 3071 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,696 psi | 61% | 2867 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,251 psi | 69% | 3002 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,249 psi | 65% | 2897 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,568 psi | 65% | 2949 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,660 psi | 45% | 2612 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,503 psi | 51% | 2743 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,835 psi | 48% | 2733 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 41,191 psi | 65% | 2940 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 50,198 psi | 79% | 3009 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,568 psi | 65% | 2949 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 43,874 psi | 69% | 2874 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 44,338 psi | 69% | 2986 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 50,430 psi | 79% | 3025 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,047 psi | 66% | 2913 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,889 psi | 70% | 2933 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 48,225 psi | 76% | 3018 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,282 psi | 74% | 3002 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,390 psi | 57% | 2753 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,450 psi | 60% | 2949 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,089 psi | 64% | 2923 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1759 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,314 psi | 80% | 3005 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,447 psi | 84% | 3035 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 39,436 psi | 62% | 2795 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,107 psi | 71% | 2904 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 38,464 psi | 60% | 2808 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 54,244 psi | 85% | 3097 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,876 psi | 73% | 2956 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 46,137 psi | 72% | 3045 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,590 psi | 81% | 2995 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,728 psi | 67% | 2854 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 41,002 psi | 64% | 2835 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 33,214 psi | 52% | 2674 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 52,228 psi | 82% | 3054 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,829 psi | 66% | 2890 fps | 95.5% |
| Norma MRP | 59.7 gr | 84% | 35,578 psi | 56% | 2831 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 39,769 psi | 62% | 2854 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 52,765 psi | 83% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 45,992 psi | 72% | 3054 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 38,522 psi | 60% | 2838 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 38,174 psi | 60% | 2854 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,891 psi | 44% | 1798 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,285 psi | 79% | 3005 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,992 psi | 74% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,045 psi | 63% | 2881 fps | 98.9% |
| ReloadSwiss RS 70 | 58 gr | 80% | 38,566 psi | 60% | 2887 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,476 psi | 56% | 2861 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 53,330 psi | 84% | 3009 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,224 psi | 74% | 2949 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,788 psi | 72% | 2940 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 40,277 psi | 63% | 2877 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 43,874 psi | 69% | 2874 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,728 psi | 67% | 2854 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 51,590 psi | 81% | 2995 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,002 psi | 64% | 2835 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,269 psi | 76% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,993 psi | 75% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,858 psi | 66% | 2792 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,914 psi | 63% | 2871 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 47,326 psi | 74% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,862 psi | 73% | 2927 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,347 psi | 57% | 2808 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,319 psi | 60% | 2799 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 53,780 psi | 84% | 2966 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,954 psi | 85% | 2982 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,252 psi | 71% | 2871 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,205 psi | 65% | 2851 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 37,739 psi | 59% | 2776 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 52,301 psi | 82% | 2976 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,712 psi | 64% | 2854 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 31,821 psi | 50% | 2690 fps | 97.5% |
| Vihtavuori N560 | 65.4 gr | 92% | 47,442 psi | 74% | 3087 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 46,644 psi | 73% | 3054 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,205 psi | 63% | 2815 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,047 psi | 66% | 2913 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,280 psi | 40% | 2579 fps | 96.5% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,335 psi | 63% | 2838 fps | 95.2% |
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 91 powders for .270 Weath. Mag. loaded with the .277 | 130gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,962 fps to 3,281 fps. ADI AR 2225 gives the best case fill at 100 %, and 91 of the 91 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 130.0 gr projectile in 0.277" calls for a 1:10.5 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. Norma MRP, Vihtavuori N560, ReloadSwiss RS 70 rank at the top here: for .270 Weath. Mag. with the .277 | 130gr | Atomic 29 HP 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.