Load Specifications
Load data in caliber 7 x 44 Penna with .277 | 125gr | Hasler Hunting bullet and 34 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Shooters World Buffalo Rifle, Lovex D060 and ReloadSwiss RS 36.
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>> | 98% | 56,231 psi | 88% | 2333 fps | 99.8% |
| Accurate 2015ᴾ | <<locked>> | 100% | 34,113 psi | 53% | 2116 fps | 95.9% |
| Accurate 5744 | <<locked>> | 84% | 56,434 psi | 88% | 2352 fps | 100% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 49,821 psi | 78% | 2244 fps | 97.7% |
| Accurate LT-32ᴾ | <<locked>> | 100% | 50,488 psi | 79% | 2247 fps | 95.7% |
| Accurate No. 11 FS | <<locked>> | 86% | 55,680 psi | 87% | 2297 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 56,681 psi | 89% | 1706 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 56,391 psi | 88% | 2228 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 49,734 psi | 78% | 2329 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 45,600 psi | 71% | 2306 fps | 96.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 32,822 psi | 51% | 2139 fps | 97.8% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 40,770 psi | 64% | 2241 fps | 98.7% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2336 fps | 99.9% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 47,326 psi | 74% | 2241 fps | 97.5% |
| Hodgdon H4198ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2326 fps | 98% |
| Hodgdon LilGun | <<locked>> | 82% | 57,188 psi | 90% | 2306 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,486 psi | 46% | 1335 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 44,498 psi | 70% | 2238 fps | 99.6% |
| IMR 4227 | <<locked>> | 96% | 55,521 psi | 87% | 2310 fps | 100% |
| Lovex D060 | <<locked>> | 90% | 56,434 psi | 88% | 2352 fps | 100% |
| Lovex D063 | <<locked>> | 86% | 56,927 psi | 89% | 2339 fps | 100% |
| Lovex S040 | <<locked>> | 82% | 55,216 psi | 87% | 2185 fps | 100% |
| Lovex S053 | <<locked>> | 98% | 55,811 psi | 87% | 2297 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 45,934 psi | 72% | 2306 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,747 psi | 45% | 1362 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 96% | 54,578 psi | 86% | 2343 fps | 100% |
| Shooters World Blackout | <<locked>> | 86% | 56,927 psi | 89% | 2339 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 56,434 psi | 88% | 2352 fps | 100% |
| Shooters World SOCOM | <<locked>> | 88% | 54,085 psi | 85% | 2293 fps | 100% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2139 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 42,496 psi | 67% | 2238 fps | 97.1% |
| Vihtavuori N110 | <<locked>> | 92% | 55,927 psi | 88% | 2221 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 2290 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 39,639 psi | 62% | 2162 fps | 98.1% |
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% | 31,183 psi | 49% | 1969 fps | 95.9% |
| Accurate 2015 | <<locked>> | 98% | 32,024 psi | 50% | 2077 fps | 95.2% |
| Accurate 5744 | <<locked>> | 80% | 49,400 psi | 77% | 2264 fps | 99.8% |
| Accurate LT-30 | <<locked>> | 92% | 39,204 psi | 61% | 2093 fps | 95.4% |
| Accurate LT-32 | <<locked>> | 98% | 47,572 psi | 75% | 2208 fps | 95% |
| Accurate No. 11 FS | <<locked>> | 80% | 45,832 psi | 72% | 2182 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 53,142 psi | 83% | 1667 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 41,713 psi | 65% | 2054 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 26,368 psi | 41% | 1946 fps | 98.3% |
| ADI AR 2219 | <<locked>> | 96% | 40,393 psi | 63% | 2224 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 94% | 27,050 psi | 42% | 2001 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 88% | 27,978 psi | 44% | 2001 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 28,239 psi | 44% | 1942 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 38,841 psi | 61% | 2116 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 90% | 40,437 psi | 63% | 2119 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 53,708 psi | 84% | 2270 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,582 psi | 34% | 1191 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 26,701 psi | 42% | 1900 fps | 95.1% |
| IMR 4227 | <<locked>> | 80% | 34,156 psi | 54% | 2014 fps | 99% |
| Lovex D060 | 15.7 gr | 80% | 41,887 psi | 66% | 2152 fps | 99.2% |
| Lovex D063 | <<locked>> | 80% | 46,746 psi | 73% | 2218 fps | 99.7% |
| Lovex S040 | <<locked>> | 80% | 51,851 psi | 81% | 2149 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 33,272 psi | 52% | 1995 fps | 100% |
| Norma 200 | <<locked>> | 82% | 25,875 psi | 41% | 1946 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,089 psi | 33% | 1217 fps | 100% |
| ReloadSwiss RS 36 | 16.4 gr | 80% | 33,069 psi | 52% | 2034 fps | 98.7% |
| Shooters World Blackout | <<locked>> | 80% | 46,746 psi | 73% | 2218 fps | 99.7% |
| Shooters World Buffalo Rifle | 15.7 gr | 80% | 41,887 psi | 66% | 2152 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 80% | 41,829 psi | 66% | 2136 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,401 psi | 49% | 1857 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 35,433 psi | 56% | 2116 fps | 95.1% |
| Vihtavuori N110 | <<locked>> | 80% | 39,218 psi | 61% | 2028 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 26,789 psi | 42% | 1926 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 90% | 29,167 psi | 46% | 1972 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 51 powders for 7 x 44 Penna loaded with the .277 | 125gr | Hasler Hunting. Accurate 5744 delivers the highest muzzle velocity at 2,352 fps; across all powders the maximum-charge window runs from 1,335 fps to 2,352 fps. Accurate 2015 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 36–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.277" calls for a 1:10.0 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 Buffalo Rifle, Lovex D060, ReloadSwiss RS 36 rank at the top here: for 7 x 44 Penna with the .277 | 125gr | Hasler Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2460, Accurate 2495, Hodgdon CFE BLK burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.