Load Specifications
Load data in caliber 7 x 44 Penna with .277 | 130gr | Speer Grand Slam bullet and 48 powders. The key underlying parameters are shown in the table above.
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>> | 94% | 57,246 psi | 90% | 2356 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 42,453 psi | 67% | 2254 fps | 99% |
| Accurate 2460ᴾ | <<locked>> | 100% | 47,050 psi | 74% | 2336 fps | 97.3% |
| Accurate 2495ᴾ | <<locked>> | 100% | 30,574 psi | 48% | 2133 fps | 96.9% |
| Accurate 5744 | <<locked>> | 84% | 57,014 psi | 89% | 2369 fps | 100% |
| Accurate LT-30ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 2352 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 98% | 54,897 psi | 86% | 2326 fps | 98% |
| Accurate No. 11 FS | <<locked>> | 82% | 56,463 psi | 88% | 2306 fps | 100% |
| ADI APS 450 | <<locked>> | 82% | 55,767 psi | 87% | 1716 fps | 100% |
| ADI AR 2205 | <<locked>> | 86% | 56,623 psi | 89% | 2234 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 55,521 psi | 87% | 2388 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2438 fps | 99.2% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,189 psi | 61% | 2270 fps | 99.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 49,342 psi | 77% | 2362 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 96% | 54,708 psi | 86% | 2362 fps | 100% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2356 fps | 99.5% |
| Hodgdon CFE BLK | <<locked>> | 84% | 55,100 psi | 86% | 2372 fps | 96.3% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 44,730 psi | 70% | 2313 fps | 98% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 53,403 psi | 84% | 2438 fps | 98.5% |
| Hodgdon H4198 | <<locked>> | 98% | 55,550 psi | 87% | 2349 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,980 psi | 49% | 1362 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 33,576 psi | 53% | 2172 fps | 96% |
| IMR 4198ᴾ | <<locked>> | 100% | 51,837 psi | 81% | 2343 fps | 100% |
| IMR 4227 | <<locked>> | 92% | 56,898 psi | 89% | 2329 fps | 100% |
| Lovex D060 | <<locked>> | 86% | 57,014 psi | 89% | 2369 fps | 100% |
| Lovex D063 | <<locked>> | 84% | 54,824 psi | 86% | 2310 fps | 100% |
| Lovex D073.4 | <<locked>> | 98% | 56,144 psi | 88% | 2448 fps | 98.1% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 47,021 psi | 74% | 2329 fps | 95.8% |
| Lovex S053 | <<locked>> | 94% | 57,682 psi | 90% | 2313 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 56,101 psi | 88% | 2425 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,966 psi | 49% | 1398 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 92% | 55,883 psi | 88% | 2359 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 48,138 psi | 75% | 2343 fps | 96.6% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 41,829 psi | 66% | 2244 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 98% | 56,144 psi | 88% | 2448 fps | 98.1% |
| Shooters World Blackout | <<locked>> | 82% | 57,130 psi | 90% | 2352 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 86% | 57,014 psi | 89% | 2369 fps | 100% |
| Shooters World SOCOM | <<locked>> | 84% | 54,824 psi | 86% | 2310 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 96% | 55,187 psi | 86% | 2149 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2448 fps | 98.6% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2362 fps | 99.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 41,945 psi | 66% | 2188 fps | 96.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 40,190 psi | 63% | 2192 fps | 96.9% |
| Vihtavuori N110 | <<locked>> | 88% | 57,290 psi | 90% | 2228 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 55,622 psi | 87% | 2346 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 47,311 psi | 74% | 2277 fps | 99.8% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 41,046 psi | 64% | 2195 fps | 98.6% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 33,446 psi | 52% | 2146 fps | 97.3% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 36,521 psi | 57% | 2077 fps | 98.7% |
| Accurate 2015 | <<locked>> | 86% | 27,427 psi | 43% | 1975 fps | 95% |
| Accurate 2460 | <<locked>> | 94% | 38,290 psi | 60% | 2201 fps | 95.2% |
| Accurate 2495 | <<locked>> | 96% | 26,861 psi | 42% | 2051 fps | 95.5% |
| Accurate 5744 | <<locked>> | 80% | 50,604 psi | 79% | 2287 fps | 100% |
| Accurate LT-30 | <<locked>> | 82% | 33,344 psi | 52% | 2001 fps | 95.2% |
| Accurate LT-32 | <<locked>> | 88% | 40,625 psi | 64% | 2123 fps | 95.1% |
| Accurate No. 11 FS | <<locked>> | 80% | 52,866 psi | 83% | 2264 fps | 100% |
| ADI APS 450 | <<locked>> | 80% | 54,186 psi | 85% | 1699 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 47,674 psi | 75% | 2133 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 32,358 psi | 51% | 2064 fps | 99.9% |
| ADI AR 2219 | <<locked>> | 86% | 34,722 psi | 54% | 2139 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 84% | 24,323 psi | 38% | 1942 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 26,600 psi | 42% | 1962 fps | 96% |
| Alliant Reloder-7 | <<locked>> | 80% | 33,895 psi | 53% | 2057 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 33,228 psi | 52% | 2031 fps | 95.6% |
| Hodgdon CFE BLK | <<locked>> | 82% | 51,561 psi | 81% | 2326 fps | 95.6% |
| Hodgdon H322 | <<locked>> | 92% | 35,201 psi | 55% | 2149 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 90% | 38,479 psi | 60% | 2215 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 82% | 34,882 psi | 55% | 2037 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,684 psi | 36% | 1214 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 31,879 psi | 50% | 2133 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 29,196 psi | 46% | 1965 fps | 97.7% |
| IMR 4227 | <<locked>> | 80% | 39,726 psi | 62% | 2110 fps | 100% |
| Lovex D060 | <<locked>> | 80% | 47,993 psi | 75% | 2254 fps | 100% |
| Lovex D063 | <<locked>> | 80% | 47,921 psi | 75% | 2228 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 41,771 psi | 65% | 2257 fps | 95.4% |
| Lovex D073.5 | <<locked>> | 98% | 43,859 psi | 69% | 2287 fps | 95.1% |
| Lovex S053 | <<locked>> | 80% | 38,624 psi | 61% | 2073 fps | 100% |
| Norma 200 | <<locked>> | 80% | 30,226 psi | 47% | 2031 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,829 psi | 36% | 1250 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 39,001 psi | 61% | 2136 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 42,757 psi | 67% | 2264 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 98% | 39,740 psi | 62% | 2211 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 90% | 41,771 psi | 65% | 2257 fps | 95.4% |
| Shooters World Blackout | <<locked>> | 80% | 53,388 psi | 84% | 2310 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 47,993 psi | 75% | 2254 fps | 100% |
| Shooters World SOCOM | <<locked>> | 80% | 47,921 psi | 75% | 2228 fps | 100% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,376 psi | 57% | 1923 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 39,291 psi | 62% | 2228 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 31,415 psi | 49% | 2044 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 39,711 psi | 62% | 2152 fps | 95.6% |
| Somchem S335 | <<locked>> | 96% | 35,766 psi | 56% | 2116 fps | 95.7% |
| Vihtavuori N110 | <<locked>> | 80% | 45,730 psi | 72% | 2103 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 32,561 psi | 51% | 2034 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 26,194 psi | 41% | 1900 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 88% | 28,747 psi | 45% | 1962 fps | 95% |
| Vihtavuori N135 | <<locked>> | 94% | 28,166 psi | 44% | 2028 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for 7 x 44 Penna loaded with the .277 | 130gr | Speer Grand Slam. Lovex D073.4 delivers the highest muzzle velocity at 2,448 fps; across all powders the maximum-charge window runs from 1,362 fps to 2,448 fps. Accurate 2015 gives the best case fill at 100 %, and 73 of the 73 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 45–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.277" calls for a 1:12.5 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. As outliers, Accurate 2200, Accurate 2230, Accurate 2520 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.