Load Specifications
Bullet:.277 | 120gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:120 gr
Bullet Diameter:0.277"
Bullet Length:<<locked>>
Case Length (l3):2.54"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:70 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:72,519 psi
Recommended Twist Rate:1:11.0
Load data in caliber .270 Win. Ackley Improved with .277 | 120gr | Barnes X S bullet and 114 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon Superformance and Alliant Reloder-17.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 61,931 psi | 85% | 3038 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 64,687 psi | 89% | 3123 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 62,917 psi | 87% | 3081 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 63,527 psi | 88% | 3143 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 63,367 psi | 87% | 3127 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,356 psi | 68% | 2989 fps | 97.5% |
| Accurate 4064 | <<locked>> | 90% | 62,758 psi | 87% | 3133 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 62,627 psi | 86% | 3228 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 82% | 65,427 psi | 90% | 3054 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,121 psi | 88% | 2451 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 64,832 psi | 89% | 3209 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 65,528 psi | 90% | 3205 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,637 psi | 77% | 3130 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 86% | 63,179 psi | 87% | 3150 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 65,137 psi | 90% | 3117 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 65,412 psi | 90% | 3353 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,463 psi | 76% | 3130 fps | 96.1% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,463 psi | 76% | 3130 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 62,526 psi | 86% | 3179 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 64,658 psi | 89% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 63,019 psi | 87% | 3205 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 62,294 psi | 86% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 64,339 psi | 89% | 3317 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,708 psi | 75% | 3120 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,963 psi | 63% | 3009 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,011 psi | 72% | 3192 fps | 99.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 64,963 psi | 90% | 3228 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 64,324 psi | 89% | 3202 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 63,121 psi | 87% | 3169 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 64,440 psi | 89% | 3123 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 63,831 psi | 88% | 3189 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 61,859 psi | 85% | 3245 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 64,020 psi | 88% | 3136 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 65,340 psi | 90% | 3166 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 64,788 psi | 89% | 3219 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 98% | 64,484 psi | 89% | 3274 fps | 99% |
| Hodgdon H4350 | <<locked>> | 96% | 64,426 psi | 89% | 3232 fps | 98% |
| Hodgdon H4895 | <<locked>> | 88% | 65,572 psi | 90% | 3222 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 58,885 psi | 81% | 3143 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 61,743 psi | 85% | 3202 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 61,366 psi | 85% | 3258 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 50% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 62,482 psi | 86% | 3163 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 62,207 psi | 86% | 3146 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 64,934 psi | 90% | 3186 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 64,426 psi | 89% | 3166 fps | 98.9% |
| IMR 4198 | <<locked>> | 82% | 63,048 psi | 87% | 3028 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 63,440 psi | 87% | 3192 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 64,542 psi | 89% | 3196 fps | 98.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 62,395 psi | 86% | 3209 fps | 99.9% |
| IMR 4895 | <<locked>> | 90% | 64,643 psi | 89% | 3235 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 63,179 psi | 87% | 3150 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 64,643 psi | 89% | 3140 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 61,815 psi | 85% | 3130 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 62,975 psi | 87% | 3120 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 65,354 psi | 90% | 3182 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 64,774 psi | 89% | 3192 fps | 99.6% |
| Lovex S070 | <<locked>> | 98% | 62,323 psi | 86% | 3179 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 63,599 psi | 88% | 3150 fps | 100% |
| Norma 202 | <<locked>> | 88% | 64,005 psi | 88% | 3143 fps | 100% |
| Norma 203B | <<locked>> | 90% | 62,192 psi | 86% | 3189 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 64,817 psi | 89% | 3255 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 51,430 psi | 71% | 3143 fps | 96.9% |
| Norma URPᴾ | <<locked>> | 100% | 64,469 psi | 89% | 3261 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 63,338 psi | 87% | 3219 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 62,961 psi | 87% | 3258 fps | 99.4% |
| Ramshot TAC | <<locked>> | 86% | 63,614 psi | 88% | 3176 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 63,614 psi | 88% | 3192 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 64,063 psi | 88% | 3153 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,869 psi | 51% | 1969 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 62,613 psi | 86% | 3127 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 64,527 psi | 89% | 3196 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 64,223 psi | 89% | 3281 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 63,976 psi | 88% | 3314 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 62,047 psi | 86% | 3248 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 65,035 psi | 90% | 3340 fps | 100% |
| Rottweil R 901 | <<locked>> | 86% | 64,672 psi | 89% | 3127 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 64,136 psi | 88% | 3146 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 64,179 psi | 89% | 3192 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,969 psi | 74% | 3107 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 63,121 psi | 87% | 3169 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 98% | 64,774 psi | 89% | 3192 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 61,815 psi | 85% | 3130 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 65,354 psi | 90% | 3182 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 62,323 psi | 86% | 3179 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 65,427 psi | 90% | 3255 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 65,267 psi | 90% | 3114 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 63,048 psi | 87% | 3163 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 62,830 psi | 87% | 3173 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 64,194 psi | 89% | 3071 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 64,934 psi | 90% | 3064 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 65,441 psi | 90% | 3146 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,461 psi | 74% | 3100 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 65,499 psi | 90% | 3189 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 63,860 psi | 88% | 3068 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 62,018 psi | 86% | 3140 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 63,773 psi | 88% | 3186 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 59,219 psi | 82% | 3209 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 55,085 psi | 76% | 3087 fps | 97.1% |
| Vihtavuori N130 | <<locked>> | 84% | 63,657 psi | 88% | 3025 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 64,339 psi | 89% | 3048 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 64,005 psi | 88% | 3100 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 64,687 psi | 89% | 3117 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 65,137 psi | 90% | 3153 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 62,888 psi | 87% | 3196 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 86% | 64,034 psi | 88% | 3153 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 62,830 psi | 87% | 3117 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 62,250 psi | 86% | 3205 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 51,474 psi | 71% | 3100 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 63,063 psi | 87% | 3163 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 64,527 psi | 89% | 3202 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 64,745 psi | 89% | 3278 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,756 psi | 58% | 3038 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 63,512 psi | 88% | 3189 fps | 100% |
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 2015 | <<locked>> | 80% | 55,245 psi | 76% | 2946 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 60,858 psi | 84% | 3074 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 49,356 psi | 68% | 2887 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 55,753 psi | 77% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 49,385 psi | 68% | 2897 fps | 95.6% |
| Accurate 3100 | <<locked>> | 94% | 40,785 psi | 56% | 2818 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,644 psi | 64% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,998 psi | 48% | 2703 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 61,844 psi | 85% | 3009 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 58,175 psi | 80% | 2365 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 50,778 psi | 70% | 2989 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 43,439 psi | 60% | 2828 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 98% | 52,199 psi | 72% | 3068 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,678 psi | 73% | 2989 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,128 psi | 75% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | 50.2 gr | 80% | 46,804 psi | 65% | 3035 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,069 psi | 72% | 3071 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,069 psi | 72% | 3071 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,859 psi | 60% | 2861 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 61,003 psi | 84% | 3041 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 46,528 psi | 64% | 2923 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 36,419 psi | 50% | 2762 fps | 95.8% |
| Alliant Reloder-17 | 49.4 gr | 80% | 38,087 psi | 53% | 2835 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 51,401 psi | 71% | 3061 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 86% | 30,618 psi | 42% | 2621 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 37,260 psi | 51% | 2864 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 50,140 psi | 69% | 2992 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 44,092 psi | 61% | 2874 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 46,833 psi | 65% | 2887 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 54,056 psi | 75% | 2972 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 52,547 psi | 72% | 3022 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 57,812 psi | 80% | 3182 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 80% | 60,075 psi | 83% | 3084 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 61,438 psi | 85% | 3114 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,599 psi | 62% | 2874 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 44,208 psi | 61% | 2920 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 50,328 psi | 69% | 2995 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 51,343 psi | 71% | 3002 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,937 psi | 44% | 2605 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,558 psi | 66% | 2976 fps | 99.8% |
| Hodgdon Superformance | 57.5 gr | 88% | 46,630 psi | 64% | 2995 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 38% | 1722 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,037 psi | 68% | 2946 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 51,459 psi | 71% | 2992 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,672 psi | 63% | 2867 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,819 psi | 66% | 2884 fps | 96.1% |
| IMR 4198 | <<locked>> | 80% | 59,814 psi | 82% | 2986 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 46,963 psi | 65% | 2913 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,339 psi | 63% | 2861 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 35,897 psi | 50% | 2713 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 47,703 psi | 66% | 2956 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 52,678 psi | 73% | 2989 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 60,829 psi | 84% | 3087 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,271 psi | 71% | 2976 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,198 psi | 69% | 2917 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 46,166 psi | 64% | 2877 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 40,756 psi | 56% | 2766 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 43,729 psi | 60% | 2848 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,241 psi | 69% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,502 psi | 70% | 2946 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,006 psi | 63% | 2917 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 53,403 psi | 74% | 3071 fps | 95.4% |
| Norma MRP | <<locked>> | 96% | 45,121 psi | 62% | 3012 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 36,898 psi | 51% | 2756 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 45,672 psi | 63% | 2927 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 40,567 psi | 56% | 2844 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 52,692 psi | 73% | 3002 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,721 psi | 73% | 3025 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 56,594 psi | 78% | 3041 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 38% | 1765 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 58,856 psi | 81% | 3074 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,382 psi | 61% | 2848 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,574 psi | 68% | 3045 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,306 psi | 56% | 2900 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 36,622 psi | 51% | 2769 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 38,406 psi | 53% | 2828 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 54,737 psi | 75% | 2982 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,892 psi | 66% | 2890 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 41,698 psi | 57% | 2815 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 50,575 psi | 70% | 3048 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 46,833 psi | 65% | 2887 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,756 psi | 56% | 2766 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,271 psi | 71% | 2976 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,166 psi | 64% | 2877 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 43,729 psi | 60% | 2848 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,134 psi | 58% | 2861 fps | 98.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 61,598 psi | 85% | 3064 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,837 psi | 71% | 2986 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,342 psi | 68% | 2956 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,894 psi | 70% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,989 psi | 59% | 2740 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,179 psi | 62% | 2812 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 50,082 psi | 69% | 3041 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 57,450 psi | 79% | 3077 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 50,720 psi | 70% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,111 psi | 70% | 2972 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 42,061 psi | 58% | 2815 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 31,560 psi | 44% | 2654 fps | 97.4% |
| Somchem S385 | <<locked>> | 96% | 48,573 psi | 67% | 2972 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 56,855 psi | 78% | 2933 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 51,184 psi | 71% | 2864 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 47,732 psi | 66% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,747 psi | 66% | 2871 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,016 psi | 55% | 2743 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 35,882 psi | 49% | 2694 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 52,997 psi | 73% | 2986 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,412 psi | 64% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,766 psi | 49% | 2700 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 33,373 psi | 46% | 2707 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,389 psi | 49% | 2664 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 53,214 psi | 73% | 3038 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,208 psi | 61% | 2920 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,908 psi | 43% | 2710 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,139 psi | 68% | 2963 fps | 99.8% |
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 114 powders for .270 Win. Ackley Improved loaded with the .277 | 120gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,353 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,353 fps. Accurate 3100 gives the best case fill at 100 %, and 114 of the 114 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (500 MPa), the top charges use 50–90 %, 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. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .270 Win. Ackley Improved 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.