Load Specifications
Load data in caliber 7 x 44 Penna with .277 | 150gr | Sierra RN Prohunter bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World AR Plus, Lovex D073.4 and SNPE Vectan SP 10.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 54,955 psi | 86% | 2149 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 47,152 psi | 74% | 2139 fps | 100% |
| Accurate 2200 | <<locked>> | 96% | 57,450 psi | 90% | 2280 fps | 96% |
| Accurate 2230 | <<locked>> | 96% | 57,725 psi | 90% | 2290 fps | 96.5% |
| Accurate 2460ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 2224 fps | 99.2% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,128 psi | 55% | 2047 fps | 99.2% |
| Accurate 2520ᴾ | <<locked>> | 100% | 45,223 psi | 71% | 2175 fps | 98% |
| Accurate 4064ᴾ | <<locked>> | 100% | 32,822 psi | 51% | 2018 fps | 96.5% |
| Accurate LT-30 | <<locked>> | 96% | 55,506 psi | 87% | 2156 fps | 99.9% |
| Accurate LT-32 | <<locked>> | 96% | 56,043 psi | 88% | 2165 fps | 99.2% |
| ADI APS 450 | <<locked>> | 82% | 56,405 psi | 88% | 1588 fps | 100% |
| ADI AR 2205 | <<locked>> | 84% | 57,203 psi | 90% | 2057 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 57,246 psi | 90% | 2208 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 56,521 psi | 89% | 2283 fps | 100% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2152 fps | 96.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 43,279 psi | 68% | 2159 fps | 100% |
| Alliant Power Pro 1200-Rᴾ | <<locked>> | 100% | 53,040 psi | 83% | 2306 fps | 97.3% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2231 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 94% | 56,289 psi | 88% | 2192 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 56,434 psi | 88% | 2188 fps | 100% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 50,053 psi | 78% | 2152 fps | 97.6% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 43,540 psi | 68% | 2165 fps | 96.5% |
| Hodgdon CFE BLK | <<locked>> | 82% | 56,101 psi | 88% | 2208 fps | 97.9% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 2257 fps | 99.9% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 54,839 psi | 86% | 2274 fps | 99.5% |
| Hodgdon H4198 | <<locked>> | 94% | 57,348 psi | 90% | 2188 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,966 psi | 50% | 1263 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,220 psi | 65% | 2146 fps | 99.3% |
| IMR 4198ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 2198 fps | 100% |
| IMR 4227 | <<locked>> | 88% | 54,186 psi | 85% | 2113 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 46,775 psi | 73% | 2152 fps | 96.4% |
| Lovex D060 | <<locked>> | 84% | 57,580 psi | 90% | 2185 fps | 100% |
| Lovex D073.4 | <<locked>> | 96% | 57,595 psi | 90% | 2283 fps | 99.3% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2224 fps | 98.3% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 39,958 psi | 63% | 2113 fps | 97% |
| Lovex S053 | <<locked>> | 90% | 55,970 psi | 88% | 2106 fps | 100% |
| Norma 200 | <<locked>> | 96% | 54,795 psi | 86% | 2215 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 41,930 psi | 66% | 2113 fps | 98% |
| Ramshot X-Terminatorᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2195 fps | 95.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,517 psi | 49% | 1289 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 57,043 psi | 89% | 2178 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 53,316 psi | 84% | 2234 fps | 98.8% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 46,108 psi | 72% | 2136 fps | 98.5% |
| Shooters World AR Plus | <<locked>> | 96% | 57,595 psi | 90% | 2283 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 57,580 psi | 90% | 2185 fps | 100% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 39,958 psi | 63% | 2113 fps | 97% |
| Shooters World SOCOM | <<locked>> | 82% | 55,434 psi | 87% | 2129 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 98% | 55,361 psi | 87% | 2211 fps | 97.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 56,579 psi | 89% | 1982 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 56,768 psi | 89% | 2290 fps | 99.6% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 55,390 psi | 87% | 2234 fps | 100% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 45,919 psi | 72% | 2080 fps | 98.4% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 36,738 psi | 58% | 1962 fps | 97.6% |
| Somchem S321ᴾ | <<locked>> | 100% | 50,444 psi | 79% | 2224 fps | 97.5% |
| Somchem S335ᴾ | <<locked>> | 100% | 44,382 psi | 70% | 2087 fps | 98.9% |
| Vihtavuori N110 | <<locked>> | 84% | 55,361 psi | 87% | 2021 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 57,319 psi | 90% | 2165 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 51,764 psi | 81% | 2149 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 44,889 psi | 70% | 2083 fps | 99.8% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2051 fps | 99.3% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 39,798 psi | 62% | 2057 fps | 97.8% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 46,963 psi | 74% | 2149 fps | 96.5% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 38,580 psi | 60% | 2057 fps | 97% |
| Winchester 748ᴾ | <<locked>> | 100% | 44,744 psi | 70% | 2172 fps | 96.9% |
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% | 39,668 psi | 62% | 1965 fps | 99.8% |
| Accurate 2015 | <<locked>> | 80% | 25,353 psi | 40% | 1775 fps | 95.9% |
| Accurate 2200 | <<locked>> | 94% | 53,490 psi | 84% | 2234 fps | 95.3% |
| Accurate 2230 | <<locked>> | 92% | 49,937 psi | 78% | 2201 fps | 95% |
| Accurate 2460 | <<locked>> | 86% | 32,880 psi | 52% | 1946 fps | 95.4% |
| Accurate 2495 | <<locked>> | 86% | 22,292 psi | 35% | 1781 fps | 95.1% |
| Accurate 2520 | <<locked>> | 92% | 34,403 psi | 54% | 2011 fps | 95.4% |
| Accurate 4064 | <<locked>> | 96% | 28,935 psi | 45% | 1942 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 34,011 psi | 53% | 1864 fps | 97.1% |
| Accurate LT-32 | <<locked>> | 80% | 34,432 psi | 54% | 1864 fps | 95% |
| ADI APS 450 | <<locked>> | 80% | 54,752 psi | 86% | 1572 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 50,560 psi | 79% | 1988 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 35,360 psi | 55% | 1942 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 31,154 psi | 49% | 1913 fps | 96% |
| ADI Benchmark 8208 | <<locked>> | 96% | 41,437 psi | 65% | 2077 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 23,598 psi | 37% | 1781 fps | 97.5% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 43,540 psi | 68% | 2178 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,675 psi | 47% | 1873 fps | 98.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,854 psi | 58% | 1946 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,126 psi | 50% | 1857 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 92% | 39,523 psi | 62% | 2001 fps | 95.3% |
| Hodgdon BL-C2 | <<locked>> | 96% | 38,014 psi | 60% | 2080 fps | 95% |
| Hodgdon CFE BLK | <<locked>> | 80% | 52,388 psi | 82% | 2165 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 80% | 28,703 psi | 45% | 1860 fps | 95% |
| Hodgdon H335 | <<locked>> | 84% | 32,460 psi | 51% | 1949 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 37,536 psi | 59% | 1929 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,221 psi | 36% | 1119 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 26,992 psi | 42% | 1870 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 31,734 psi | 50% | 1864 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 43,149 psi | 68% | 1985 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 41,437 psi | 65% | 2077 fps | 95.1% |
| Lovex D060 | <<locked>> | 80% | 50,923 psi | 80% | 2110 fps | 100% |
| Lovex D073.4 | 20 gr | 82% | 35,375 psi | 55% | 1988 fps | 95.4% |
| Lovex D073.5 | <<locked>> | 90% | 37,318 psi | 58% | 2021 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 96% | 34,679 psi | 54% | 2028 fps | 95.5% |
| Lovex S053 | <<locked>> | 80% | 41,916 psi | 66% | 1946 fps | 100% |
| Norma 200 | <<locked>> | 80% | 33,344 psi | 52% | 1929 fps | 99.6% |
| Norma 202 | <<locked>> | 90% | 31,038 psi | 49% | 1926 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 98% | 48,950 psi | 77% | 2152 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,496 psi | 37% | 1155 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 42,221 psi | 66% | 2008 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 36,376 psi | 57% | 1995 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 88% | 32,576 psi | 51% | 1919 fps | 95.2% |
| Shooters World AR Plus | 20 gr | 82% | 35,375 psi | 55% | 1988 fps | 95.4% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 50,923 psi | 80% | 2110 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 96% | 34,679 psi | 54% | 2028 fps | 95.5% |
| Shooters World SOCOM | <<locked>> | 80% | 51,735 psi | 81% | 2093 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 44,831 psi | 70% | 2087 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,552 psi | 62% | 1798 fps | 100% |
| SNPE Vectan SP 10 | 20 gr | 82% | 33,605 psi | 53% | 1965 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 30,226 psi | 47% | 1867 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 32,343 psi | 51% | 1870 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 29,182 psi | 46% | 1824 fps | 95.1% |
| Somchem S321 | <<locked>> | 94% | 41,089 psi | 64% | 2096 fps | 95.5% |
| Somchem S335 | <<locked>> | 86% | 29,327 psi | 46% | 1837 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 49,298 psi | 77% | 1962 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 35,549 psi | 56% | 1913 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,601 psi | 45% | 1808 fps | 97.9% |
| Vihtavuori N133 | <<locked>> | 80% | 24,976 psi | 39% | 1732 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 86% | 24,497 psi | 38% | 1795 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 92% | 31,314 psi | 49% | 1909 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 96% | 41,350 psi | 65% | 2070 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 96% | 33,823 psi | 53% | 1975 fps | 95.5% |
| Winchester 748 | <<locked>> | 96% | 39,682 psi | 62% | 2096 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 64 powders for 7 x 44 Penna loaded with the .277 | 150gr | Sierra RN Prohunter. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,306 fps; across all powders the maximum-charge window runs from 1,263 fps to 2,306 fps. Accurate 2015 gives the best case fill at 100 %, and 64 of the 64 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 150.0 gr projectile in 0.277" calls for a 1:13.0 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. Shooters World AR Plus, Lovex D073.4, SNPE Vectan SP 10 rank at the top here: for 7 x 44 Penna with the .277 | 150gr | Sierra RN Prohunter they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss 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.