Load Specifications
Bullet:.277 | 130gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:130 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:1:10.5
Load data in caliber .270 Win. Ackley Improved with .277 | 130gr | Atomic 29 HP bullet and 117 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 ReloadSwiss RS 52.
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>> | 86% | 64,208 psi | 89% | 2963 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 62,946 psi | 87% | 3002 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 64,426 psi | 89% | 2999 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 62,062 psi | 86% | 3022 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 62,627 psi | 86% | 3022 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,456 psi | 65% | 2871 fps | 97.8% |
| Accurate 4064 | <<locked>> | 92% | 64,179 psi | 89% | 3051 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 61,148 psi | 84% | 3110 fps | 100% |
| Accurate LT-30 | <<locked>> | 82% | 64,992 psi | 90% | 2943 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 65,514 psi | 90% | 2979 fps | 100% |
| ADI APS 450 | <<locked>> | 86% | 64,150 psi | 88% | 2356 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 63,483 psi | 88% | 3087 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 64,643 psi | 89% | 3087 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,926 psi | 76% | 3028 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 62,294 psi | 86% | 3035 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 64,368 psi | 89% | 2999 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 64,890 psi | 89% | 3235 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 65,340 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 63,367 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 62,018 psi | 86% | 3087 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 61,685 psi | 85% | 3166 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 63,947 psi | 88% | 3202 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,853 psi | 74% | 3015 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,570 psi | 61% | 2894 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,262 psi | 54% | 2789 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,734 psi | 70% | 3081 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 65,180 psi | 90% | 2940 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 64,121 psi | 88% | 3110 fps | 100% |
| Bofors RP3 | <<locked>> | 92% | 62,642 psi | 86% | 3081 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 61,888 psi | 85% | 3054 fps | 98.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 63,483 psi | 88% | 3009 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 62,482 psi | 86% | 3068 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 65,354 psi | 90% | 3186 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 62,975 psi | 87% | 3018 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 64,469 psi | 89% | 3045 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 63,440 psi | 87% | 3100 fps | 100% |
| Hodgdon H414 | <<locked>> | 98% | 63,802 psi | 88% | 3163 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 96% | 63,773 psi | 88% | 3120 fps | 98.5% |
| Hodgdon H4895 | <<locked>> | 88% | 64,237 psi | 89% | 3097 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 58,059 psi | 80% | 3028 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 64,861 psi | 89% | 3140 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 65,456 psi | 90% | 3215 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 50% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 65,557 psi | 90% | 3097 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 64,905 psi | 90% | 3071 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 64,208 psi | 89% | 3071 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 63,831 psi | 88% | 3061 fps | 99.3% |
| IMR 4198 | <<locked>> | 82% | 62,685 psi | 86% | 2917 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 62,859 psi | 87% | 3087 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 63,831 psi | 88% | 3087 fps | 99.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 61,308 psi | 85% | 3094 fps | 100% |
| IMR 4895 | <<locked>> | 90% | 63,643 psi | 88% | 3117 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 62,294 psi | 86% | 3035 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 63,034 psi | 87% | 3015 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 64,484 psi | 89% | 3061 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 62,482 psi | 86% | 3009 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 64,150 psi | 88% | 3061 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 63,599 psi | 88% | 3077 fps | 99.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 64,905 psi | 90% | 3117 fps | 99.5% |
| Norma 201 | <<locked>> | 88% | 62,018 psi | 86% | 3025 fps | 100% |
| Norma 202 | <<locked>> | 88% | 62,859 psi | 87% | 3025 fps | 100% |
| Norma 203B | <<locked>> | 92% | 65,311 psi | 90% | 3127 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 64,513 psi | 89% | 3150 fps | 98.2% |
| Norma MRPᴾ | <<locked>> | 100% | 50,169 psi | 69% | 3031 fps | 97.5% |
| Norma URPᴾ | <<locked>> | 100% | 63,367 psi | 87% | 3143 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 62,526 psi | 86% | 3104 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 62,526 psi | 86% | 3150 fps | 99.7% |
| Ramshot TAC | <<locked>> | 86% | 62,903 psi | 87% | 3064 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 86% | 62,859 psi | 87% | 3077 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 63,237 psi | 87% | 3038 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,419 psi | 50% | 1883 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 61,511 psi | 85% | 3009 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 63,512 psi | 88% | 3081 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 63,454 psi | 88% | 3163 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 63,483 psi | 88% | 3196 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 65,209 psi | 90% | 3189 fps | 100% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 64,121 psi | 88% | 3225 fps | 100% |
| Rottweil R 901 | <<locked>> | 86% | 62,830 psi | 87% | 3002 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 62,613 psi | 86% | 3022 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 62,497 psi | 86% | 3071 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 56,710 psi | 78% | 3002 fps | 95.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,663 psi | 73% | 2992 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 96% | 61,888 psi | 85% | 3054 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 63,599 psi | 88% | 3077 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 64,484 psi | 89% | 3061 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 64,150 psi | 88% | 3061 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 64,905 psi | 90% | 3117 fps | 99.5% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 65,398 psi | 90% | 3038 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 64,658 psi | 89% | 3136 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 64,513 psi | 89% | 2992 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 61,714 psi | 85% | 3045 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 62,105 psi | 86% | 3061 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 63,396 psi | 87% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 64,150 psi | 88% | 2953 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 64,005 psi | 88% | 3031 fps | 99.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,214 psi | 72% | 2989 fps | 96.4% |
| Somchem S321 | <<locked>> | 84% | 64,165 psi | 88% | 3068 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 62,540 psi | 86% | 2949 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 65,398 psi | 90% | 3084 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 62,279 psi | 86% | 3064 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 58,392 psi | 81% | 3091 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,592 psi | 74% | 2972 fps | 97.5% |
| Vihtavuori N130 | <<locked>> | 84% | 62,671 psi | 86% | 2907 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 63,657 psi | 88% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 62,946 psi | 87% | 2979 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 63,454 psi | 88% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 64,368 psi | 89% | 3041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 62,120 psi | 86% | 3084 fps | 100% |
| Vihtavuori N530 | <<locked>> | 86% | 63,019 psi | 87% | 3035 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 61,569 psi | 85% | 2995 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 65,079 psi | 90% | 3143 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,632 psi | 68% | 2972 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 62,439 psi | 86% | 3054 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 63,773 psi | 88% | 3084 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 64,150 psi | 88% | 3166 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,263 psi | 56% | 2923 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 62,395 psi | 86% | 3071 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% | 53,505 psi | 74% | 2825 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 58,958 psi | 81% | 2949 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,499 psi | 64% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,998 psi | 74% | 2913 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,933 psi | 62% | 2730 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 38,522 psi | 53% | 2694 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 43,947 psi | 61% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,793 psi | 45% | 2575 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 61,221 psi | 84% | 2894 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 61,685 psi | 85% | 2930 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 58,073 psi | 80% | 2270 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 49,472 psi | 68% | 2874 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 42,177 psi | 58% | 2720 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 48,196 psi | 66% | 2907 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,561 psi | 71% | 2874 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,837 psi | 73% | 2851 fps | 100% |
| Alliant Power Pro 2000-MR | 49.2 gr | 80% | 45,600 psi | 63% | 2917 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,250 psi | 58% | 2743 fps | 99.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 59,611 psi | 82% | 2917 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,092 psi | 62% | 2808 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,692 psi | 45% | 2585 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,709 psi | 51% | 2720 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 96% | 47,398 psi | 65% | 2897 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,689 psi | 40% | 2493 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,796 psi | 51% | 2726 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,418 psi | 49% | 2743 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 61,017 psi | 84% | 2890 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,994 psi | 68% | 2881 fps | 99.3% |
| Bofors RP3 | <<locked>> | 80% | 42,119 psi | 58% | 2749 fps | 99.6% |
| Bofors RP7 | <<locked>> | 86% | 45,498 psi | 63% | 2779 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,982 psi | 73% | 2858 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,053 psi | 70% | 2900 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 56,869 psi | 78% | 3064 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 59,234 psi | 82% | 2969 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 60,437 psi | 83% | 2995 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,685 psi | 59% | 2753 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 42,844 psi | 59% | 2808 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 46,166 psi | 64% | 2828 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,995 psi | 69% | 2884 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,168 psi | 42% | 2484 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,441 psi | 64% | 2861 fps | 99.9% |
| Hodgdon Superformance | 56.4 gr | 88% | 45,411 psi | 63% | 2884 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,876 psi | 37% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,979 psi | 66% | 2835 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 50,357 psi | 69% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,324 psi | 61% | 2753 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,659 psi | 64% | 2779 fps | 96.6% |
| IMR 4198 | <<locked>> | 80% | 58,943 psi | 81% | 2867 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 43,149 psi | 60% | 2753 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,481 psi | 57% | 2697 fps | 95% |
| IMR 4831 | <<locked>> | 82% | 34,084 psi | 47% | 2592 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 46,253 psi | 64% | 2841 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 51,561 psi | 71% | 2874 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 59,030 psi | 81% | 2966 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,269 psi | 68% | 2848 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,037 psi | 68% | 2805 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 44,425 psi | 61% | 2756 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,492 psi | 50% | 2589 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 41,916 psi | 58% | 2730 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 48,472 psi | 67% | 2818 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,066 psi | 68% | 2825 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,483 psi | 61% | 2795 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 48,979 psi | 68% | 2904 fps | 95.2% |
| Norma MRP | <<locked>> | 96% | 43,758 psi | 60% | 2900 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,967 psi | 45% | 2575 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 44,338 psi | 61% | 2812 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 39,160 psi | 54% | 2733 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 51,517 psi | 71% | 2890 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,532 psi | 71% | 2910 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 55,477 psi | 77% | 2927 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 38% | 1690 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 57,667 psi | 80% | 2953 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,004 psi | 59% | 2736 fps | 96.3% |
| ReloadSwiss RS 52 | 47.7 gr | 80% | 48,153 psi | 66% | 2923 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,044 psi | 54% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,795 psi | 48% | 2648 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,927 psi | 51% | 2717 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 52,533 psi | 72% | 2858 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,267 psi | 64% | 2772 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 39,610 psi | 55% | 2690 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 98% | 53,026 psi | 73% | 2940 fps | 95% |
| Rottweil R 905 | <<locked>> | 98% | 49,414 psi | 68% | 2936 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 86% | 45,498 psi | 63% | 2779 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,492 psi | 50% | 2589 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,269 psi | 68% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,425 psi | 61% | 2756 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,916 psi | 58% | 2730 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 60,887 psi | 84% | 2979 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,625 psi | 56% | 2743 fps | 98.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 60,655 psi | 84% | 2946 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,285 psi | 69% | 2867 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,950 psi | 66% | 2841 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,501 psi | 68% | 2762 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,553 psi | 57% | 2625 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,654 psi | 56% | 2641 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,936 psi | 67% | 2930 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 56,115 psi | 77% | 2959 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 49,197 psi | 68% | 2762 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,835 psi | 69% | 2858 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 40,248 psi | 56% | 2694 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 29,675 psi | 41% | 2530 fps | 97.4% |
| Somchem S385 | <<locked>> | 94% | 43,976 psi | 61% | 2802 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 55,608 psi | 77% | 2815 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 49,937 psi | 69% | 2749 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,021 psi | 63% | 2746 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,354 psi | 64% | 2756 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,334 psi | 53% | 2625 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 34,316 psi | 47% | 2579 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 51,822 psi | 71% | 2874 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,759 psi | 62% | 2743 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,837 psi | 47% | 2579 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 86% | 31,212 psi | 43% | 2572 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,837 psi | 47% | 2552 fps | 97.8% |
| Winchester 748 | <<locked>> | 80% | 52,272 psi | 72% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,844 psi | 59% | 2808 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,877 psi | 40% | 2579 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,718 psi | 66% | 2844 fps | 99.9% |
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 117 powders for .270 Win. Ackley Improved loaded with the .277 | 130gr | Atomic 29 HP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 1,844 fps to 3,235 fps. Accurate 3100 gives the best case fill at 100 %, and 117 of the 117 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 130.0 gr projectile in 0.277" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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, ReloadSwiss RS 52 rank at the top here: for .270 Win. Ackley Improved 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.