Load Specifications
Load data in caliber 7 x 44 Penna with .277 | 156gr | Sako Hammerhead bullet and 62 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 10, Shooters World AR Plus and Lovex D073.4.
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 1680 | <<locked>> | 92% | 57,624 psi | 90% | 2100 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 45,803 psi | 72% | 2051 fps | 99.9% |
| Accurate 2230 | <<locked>> | 96% | 56,173 psi | 88% | 2195 fps | 96.1% |
| Accurate 2460ᴾ | <<locked>> | 100% | 50,807 psi | 80% | 2133 fps | 99% |
| Accurate 2495ᴾ | <<locked>> | 100% | 34,011 psi | 53% | 1962 fps | 99.1% |
| Accurate 2520ᴾ | <<locked>> | 100% | 43,903 psi | 69% | 2087 fps | 97.8% |
| Accurate 4064ᴾ | <<locked>> | 100% | 31,792 psi | 50% | 1936 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 98% | 57,188 psi | 90% | 2096 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 96% | 54,578 psi | 86% | 2073 fps | 99% |
| ADI APS 450 | <<locked>> | 82% | 56,956 psi | 89% | 1532 fps | 100% |
| ADI AR 2205 | <<locked>> | 84% | 56,057 psi | 88% | 1972 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 55,985 psi | 88% | 2123 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 54,795 psi | 86% | 2188 fps | 99.9% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2057 fps | 96% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 42,148 psi | 66% | 2070 fps | 100% |
| Alliant Power Pro 1200-Rᴾ | <<locked>> | 100% | 51,169 psi | 80% | 2208 fps | 96.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 52,779 psi | 83% | 2136 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 94% | 55,230 psi | 87% | 2106 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 55,376 psi | 87% | 2103 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 49,081 psi | 77% | 2064 fps | 97.4% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 41,959 psi | 66% | 2070 fps | 96% |
| Hodgdon CFE BLK | <<locked>> | 82% | 54,795 psi | 86% | 2116 fps | 97.7% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2162 fps | 99.8% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 2185 fps | 99.4% |
| Hodgdon H4198 | <<locked>> | 94% | 56,376 psi | 88% | 2100 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,546 psi | 49% | 1207 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 40,190 psi | 63% | 2057 fps | 99.1% |
| IMR 4198ᴾ | <<locked>> | 100% | 54,824 psi | 86% | 2113 fps | 100% |
| IMR 4227 | <<locked>> | 90% | 56,260 psi | 88% | 2060 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2057 fps | 96% |
| Lovex D060 | <<locked>> | 84% | 56,275 psi | 88% | 2093 fps | 100% |
| Lovex D073.4 | <<locked>> | 96% | 55,854 psi | 88% | 2185 fps | 99.1% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 2136 fps | 98.1% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 38,667 psi | 61% | 2024 fps | 96.6% |
| Lovex S053 | <<locked>> | 90% | 54,810 psi | 86% | 2021 fps | 100% |
| Norma 200 | <<locked>> | 98% | 56,246 psi | 88% | 2156 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 40,930 psi | 64% | 2028 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,705 psi | 50% | 1243 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 56,492 psi | 89% | 2100 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 2139 fps | 98.5% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 44,773 psi | 70% | 2047 fps | 98.2% |
| Shooters World AR Plus | <<locked>> | 96% | 55,854 psi | 88% | 2185 fps | 99.1% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 56,275 psi | 88% | 2093 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 38,667 psi | 61% | 2024 fps | 96.6% |
| Shooters World SOCOM | <<locked>> | 82% | 53,983 psi | 85% | 2041 fps | 100% |
| Shooters World Tactical Rifleᴾ | <<locked>> | 100% | 57,493 psi | 90% | 2156 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 55,158 psi | 86% | 1896 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 54,621 psi | 86% | 2188 fps | 99.5% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 2149 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 45,353 psi | 71% | 1998 fps | 98.3% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 36,260 psi | 57% | 1886 fps | 97.4% |
| Somchem S321ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2129 fps | 97.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 43,352 psi | 68% | 2001 fps | 98.8% |
| Vihtavuori N110 | <<locked>> | 86% | 57,566 psi | 90% | 1969 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 56,014 psi | 88% | 2080 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2070 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 44,266 psi | 69% | 2001 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 36,405 psi | 57% | 1972 fps | 99.2% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 38,986 psi | 61% | 1975 fps | 97.6% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 2064 fps | 96.2% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 37,434 psi | 59% | 1969 fps | 96.6% |
| Winchester 748ᴾ | <<locked>> | 100% | 43,671 psi | 68% | 2083 fps | 96.6% |
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 1680 | <<locked>> | 80% | 38,986 psi | 61% | 1886 fps | 99.7% |
| Accurate 2015 | <<locked>> | 80% | 24,801 psi | 39% | 1703 fps | 95.6% |
| Accurate 2230 | <<locked>> | 94% | 51,996 psi | 81% | 2149 fps | 95.3% |
| Accurate 2460 | <<locked>> | 88% | 34,011 psi | 53% | 1903 fps | 95.7% |
| Accurate 2495 | <<locked>> | 88% | 22,597 psi | 35% | 1736 fps | 95.4% |
| Accurate 2520 | <<locked>> | 92% | 33,460 psi | 52% | 1929 fps | 95% |
| Accurate 4064 | <<locked>> | 98% | 29,472 psi | 46% | 1890 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 33,562 psi | 53% | 1788 fps | 97% |
| Accurate LT-32 | <<locked>> | 82% | 35,969 psi | 56% | 1824 fps | 95.5% |
| ADI APS 450 | <<locked>> | 80% | 54,346 psi | 85% | 1506 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 49,893 psi | 78% | 1913 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 34,548 psi | 54% | 1864 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 30,487 psi | 48% | 1834 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 98% | 42,786 psi | 67% | 2024 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 23,163 psi | 36% | 1709 fps | 97.2% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 45,411 psi | 71% | 2133 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 28,950 psi | 45% | 1798 fps | 98.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,260 psi | 57% | 1870 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 31,212 psi | 49% | 1778 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 92% | 38,725 psi | 61% | 1923 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 98% | 39,624 psi | 62% | 2034 fps | 95.4% |
| Hodgdon CFE BLK | <<locked>> | 80% | 51,706 psi | 81% | 2077 fps | 97.2% |
| Hodgdon H322 | <<locked>> | 82% | 29,646 psi | 46% | 1818 fps | 95.4% |
| Hodgdon H335 | <<locked>> | 86% | 33,997 psi | 53% | 1909 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 80% | 37,028 psi | 58% | 1854 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,453 psi | 37% | 1079 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 27,978 psi | 44% | 1831 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 31,386 psi | 49% | 1795 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 42,264 psi | 66% | 1906 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 42,786 psi | 67% | 2024 fps | 95.4% |
| Lovex D060 | <<locked>> | 80% | 50,111 psi | 79% | 2028 fps | 100% |
| Lovex D073.4 | 18.8 gr | 82% | 34,345 psi | 54% | 1903 fps | 95% |
| Lovex D073.5 | <<locked>> | 92% | 38,435 psi | 60% | 1972 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 96% | 33,794 psi | 53% | 1946 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 41,510 psi | 65% | 1873 fps | 100% |
| Norma 200 | <<locked>> | 80% | 32,721 psi | 51% | 1854 fps | 99.5% |
| Norma 202 | <<locked>> | 92% | 31,995 psi | 50% | 1880 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,206 psi | 36% | 1106 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 41,669 psi | 65% | 1932 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 35,505 psi | 56% | 1913 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 90% | 33,692 psi | 53% | 1877 fps | 95.6% |
| Shooters World AR Plus | 18.8 gr | 82% | 34,345 psi | 54% | 1903 fps | 95% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 50,111 psi | 79% | 2028 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 33,794 psi | 53% | 1946 fps | 95.1% |
| Shooters World SOCOM | <<locked>> | 80% | 50,952 psi | 80% | 2011 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 43,918 psi | 69% | 2001 fps | 95.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,841 psi | 61% | 1726 fps | 100% |
| SNPE Vectan SP 10 | 18.8 gr | 82% | 32,677 psi | 51% | 1880 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 29,631 psi | 46% | 1791 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 33,112 psi | 52% | 1821 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 30,081 psi | 47% | 1778 fps | 95.4% |
| Somchem S321 | <<locked>> | 94% | 40,306 psi | 63% | 2014 fps | 95.2% |
| Somchem S335 | <<locked>> | 88% | 29,965 psi | 47% | 1788 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 48,588 psi | 76% | 1883 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 34,766 psi | 54% | 1837 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,021 psi | 44% | 1732 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 82% | 25,918 psi | 41% | 1696 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 86% | 23,888 psi | 37% | 1719 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 92% | 30,690 psi | 48% | 1831 fps | 95% |
| Vihtavuori N530 | <<locked>> | 98% | 42,830 psi | 67% | 2021 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 96% | 33,054 psi | 52% | 1893 fps | 95.2% |
| Winchester 748 | <<locked>> | 96% | 38,464 psi | 60% | 2005 fps | 95.1% |
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 85 powders for 7 x 44 Penna loaded with the .277 | 156gr | Sako Hammerhead. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,208 fps; across all powders the maximum-charge window runs from 1,207 fps to 2,208 fps. Accurate 2015 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.277" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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. SNPE Vectan SP 10, Shooters World AR Plus, Lovex D073.4 rank at the top here: for 7 x 44 Penna with the .277 | 156gr | Sako Hammerhead they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, Alliant Reloder- TS 15.5, Baschieri & Pellagri 107 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss, ReloadSwiss RS 14 stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.