Load Specifications
Load data in caliber .270 Weath. Mag. with .277 | 120gr | Barnes X S bullet and 84 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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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% | 56,739 psi | 89% | 3166 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 56,913 psi | 89% | 3235 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 54,679 psi | 86% | 3228 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 57,406 psi | 90% | 3386 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 84% | 56,115 psi | 88% | 3192 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,607 psi | 86% | 3258 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 56,130 psi | 88% | 3314 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,998 psi | 86% | 3258 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,998 psi | 86% | 3258 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,363 psi | 90% | 3219 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,522 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,534 psi | 85% | 3281 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,898 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,302 psi | 85% | 3251 fps | 98% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,622 psi | 87% | 3320 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3301 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3232 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 57,014 psi | 89% | 3402 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3301 fps | 98.1% |
| Bofors RP3 | <<locked>> | 82% | 55,288 psi | 87% | 3189 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,622 psi | 87% | 3320 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 57,537 psi | 90% | 3222 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 3153 fps | 96.1% |
| Hodgdon H380 | <<locked>> | 82% | 55,172 psi | 86% | 3202 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 55,941 psi | 88% | 3274 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 55,361 psi | 87% | 3225 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 56,072 psi | 88% | 3251 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,042 psi | 86% | 3232 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,085 psi | 86% | 3199 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,109 psi | 75% | 3271 fps | 97.6% |
| Hodgdon Superformance | <<locked>> | 88% | 56,333 psi | 88% | 3314 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 58% | 2044 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,492 psi | 87% | 3173 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,696 psi | 90% | 3205 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 55,071 psi | 86% | 3199 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,172 psi | 86% | 3189 fps | 99.1% |
| IMR 4831 | <<locked>> | 90% | 54,839 psi | 86% | 3215 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,464 psi | 90% | 3238 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3350 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 56,202 psi | 88% | 3169 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,086 psi | 88% | 3192 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 57,479 psi | 90% | 3238 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 3136 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 56,927 psi | 89% | 3232 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,651 psi | 87% | 3251 fps | 98% |
| Norma MRP | <<locked>> | 96% | 55,448 psi | 87% | 3350 fps | 99.3% |
| Norma URP | <<locked>> | 90% | 56,231 psi | 88% | 3261 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 57,595 psi | 90% | 3255 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,128 psi | 85% | 3301 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,969 psi | 86% | 3258 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3238 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,739 psi | 59% | 2093 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,882 psi | 86% | 3179 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 55,114 psi | 86% | 3294 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,114 psi | 85% | 3245 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,898 psi | 88% | 3333 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,573 psi | 76% | 3271 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 55,390 psi | 87% | 3186 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,420 psi | 88% | 3228 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 57,406 psi | 90% | 3301 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 57,537 psi | 90% | 3222 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,086 psi | 88% | 3192 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 56,202 psi | 88% | 3169 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,479 psi | 90% | 3238 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,362 psi | 88% | 3241 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,274 psi | 87% | 3051 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,753 psi | 87% | 3140 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,927 psi | 89% | 3294 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 55,071 psi | 86% | 3176 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,795 psi | 86% | 3159 fps | 96.1% |
| Somchem S365 | <<locked>> | 92% | 56,202 psi | 88% | 3268 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,708 psi | 86% | 3212 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 86% | 56,159 psi | 88% | 3146 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,636 psi | 86% | 3196 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 3238 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 56,811 psi | 89% | 3143 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,725 psi | 90% | 3261 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,869 psi | 88% | 3284 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 55,434 psi | 87% | 3333 fps | 96.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,561 psi | 81% | 3238 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,128 psi | 85% | 3153 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 56,231 psi | 88% | 3278 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,228 psi | 82% | 3383 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,389 psi | 85% | 3199 fps | 97.9% |
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% | 53,374 psi | 84% | 3107 fps | 98.3% |
| Accurate 3100 | <<locked>> | 82% | 34,200 psi | 54% | 2769 fps | 95.1% |
| Accurate 4350 | <<locked>> | 80% | 42,293 psi | 66% | 2992 fps | 99% |
| Accurate High Country | <<locked>> | 90% | 46,818 psi | 73% | 3182 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,777 psi | 78% | 3081 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 45,281 psi | 71% | 3074 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 49,342 psi | 77% | 3186 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,728 psi | 67% | 3012 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,728 psi | 67% | 3012 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,894 psi | 80% | 3114 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,114 psi | 85% | 3189 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,943 psi | 63% | 2986 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,571 psi | 71% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,337 psi | 66% | 3005 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 90% | 43,091 psi | 68% | 3068 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,501 psi | 48% | 2740 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 34,200 psi | 54% | 2861 fps | 95.7% |
| Alliant Reloder-26 | 59.5 gr | 80% | 32,648 psi | 51% | 2861 fps | 96% |
| Bofors RP15 | <<locked>> | 92% | 42,554 psi | 67% | 3051 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,924 psi | 81% | 3133 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 43,091 psi | 68% | 3068 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 45,339 psi | 71% | 2992 fps | 96.9% |
| Hodgdon H1000 | <<locked>> | 98% | 45,513 psi | 71% | 3087 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 51,822 psi | 81% | 3143 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,323 psi | 68% | 3025 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 80% | 45,992 psi | 72% | 3045 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 52,576 psi | 82% | 3186 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,663 psi | 81% | 3169 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,927 psi | 59% | 2871 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,511 psi | 67% | 3133 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 42,395 psi | 66% | 3038 fps | 96.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 44% | 1834 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,388 psi | 82% | 3120 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,288 psi | 85% | 3146 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 40,683 psi | 64% | 2907 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,180 psi | 72% | 3015 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 40,176 psi | 63% | 2930 fps | 98.7% |
| IMR 4955 Enduron | <<locked>> | 92% | 51,082 psi | 80% | 3123 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 50,488 psi | 79% | 3222 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 53,084 psi | 83% | 3120 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,382 psi | 70% | 2972 fps | 98.4% |
| Lovex S070 | <<locked>> | 80% | 42,699 psi | 67% | 2953 fps | 97% |
| Lovex S071 | <<locked>> | 88% | 35,462 psi | 56% | 2805 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 53,505 psi | 84% | 3176 fps | 100% |
| Norma 204 | <<locked>> | 84% | 45,963 psi | 72% | 3064 fps | 95.8% |
| Norma MRP | 62.1 gr | 86% | 39,668 psi | 62% | 3018 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 41,263 psi | 65% | 2976 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,867 psi | 84% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 47,166 psi | 74% | 3163 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,045 psi | 63% | 2956 fps | 97% |
| Ramshot Magnum | <<locked>> | 92% | 39,813 psi | 62% | 2966 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 44% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,372 psi | 81% | 3117 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,182 psi | 76% | 3179 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,597 psi | 65% | 3002 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,958 psi | 63% | 3005 fps | 98.1% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 39,682 psi | 62% | 3051 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 49,023 psi | 77% | 3077 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,934 psi | 74% | 3048 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 41,800 psi | 66% | 2992 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 45,339 psi | 71% | 2992 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,382 psi | 70% | 2972 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 53,084 psi | 83% | 3120 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,699 psi | 67% | 2953 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,530 psi | 78% | 3123 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,168 psi | 77% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,482 psi | 68% | 2907 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 44,150 psi | 69% | 3051 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,907 psi | 77% | 3071 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 51,387 psi | 81% | 3097 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,985 psi | 60% | 2933 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 40,147 psi | 63% | 2920 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,702 psi | 73% | 2989 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,583 psi | 67% | 2969 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 41,800 psi | 66% | 2946 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 53,447 psi | 84% | 3094 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,250 psi | 66% | 2972 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,924 psi | 53% | 2825 fps | 97.5% |
| Vihtavuori N560 | 67.9 gr | 94% | 51,779 psi | 81% | 3264 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 48,399 psi | 76% | 3176 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,510 psi | 65% | 2927 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 43,540 psi | 68% | 3031 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,427 psi | 43% | 2726 fps | 96.9% |
| Winchester Supreme 780 | <<locked>> | 90% | 44,440 psi | 70% | 3012 fps | 95.6% |
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 84 powders for .270 Weath. Mag. loaded with the .277 | 120gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 3,402 fps; across all powders the maximum-charge window runs from 2,044 fps to 3,402 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 84 of the 84 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 120.0 gr projectile in 0.277" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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 Weath. Mag. with the .277 | 120gr | Barnes X S 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.