Load Specifications
Load data in caliber 7 x 44 Penna with .277 | 90gr | Speer TNT HP bullet and 26 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 Accurate 5744.
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% | 54,665 psi | 86% | 2844 fps | 98.8% |
| Accurate 5744 | <<locked>> | 88% | 55,158 psi | 86% | 2887 fps | 99.5% |
| Accurate No. 11 FS | <<locked>> | 88% | 57,319 psi | 90% | 2864 fps | 100% |
| ADI APS 450 | <<locked>> | 84% | 56,144 psi | 88% | 2149 fps | 100% |
| ADI AR 2205 | <<locked>> | 90% | 55,376 psi | 87% | 2756 fps | 100% |
| ADI AR 2207ᴾ | <<locked>> | 100% | 47,659 psi | 75% | 2844 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 39,479 psi | 62% | 2720 fps | 96.5% |
| Alliant Reloder-7ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2848 fps | 99% |
| Hodgdon LilGun | <<locked>> | 82% | 56,086 psi | 88% | 2858 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,356 psi | 46% | 1686 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 42,975 psi | 67% | 2720 fps | 98% |
| IMR 4227 | <<locked>> | 98% | 56,782 psi | 89% | 2877 fps | 100% |
| Lovex D060 | <<locked>> | 90% | 55,158 psi | 86% | 2887 fps | 99.5% |
| Lovex D063 | <<locked>> | 90% | 56,101 psi | 88% | 2858 fps | 99.8% |
| Lovex S040 | <<locked>> | 84% | 56,536 psi | 89% | 2749 fps | 100% |
| Lovex S053ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2867 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 44,817 psi | 70% | 2805 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 28,935 psi | 45% | 1729 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 98% | 55,666 psi | 87% | 2907 fps | 100% |
| Shooters World Blackout | <<locked>> | 86% | 54,882 psi | 86% | 2861 fps | 99.5% |
| Shooters World Buffalo Rifle | <<locked>> | 90% | 55,158 psi | 86% | 2887 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 90% | 56,101 psi | 88% | 2858 fps | 99.8% |
| SNPE Vectan BA6 1/2ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2648 fps | 100% |
| Vihtavuori N110 | <<locked>> | 94% | 57,159 psi | 90% | 2789 fps | 100% |
| Vihtavuori N120ᴾ | <<locked>> | 100% | 47,935 psi | 75% | 2802 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 38,450 psi | 60% | 2625 fps | 95.7% |
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>> | 86% | 36,767 psi | 58% | 2539 fps | 95.3% |
| Accurate 5744 | 20.2 gr | 80% | 43,555 psi | 68% | 2690 fps | 98% |
| Accurate No. 11 FS | <<locked>> | 80% | 44,614 psi | 70% | 2680 fps | 99.9% |
| ADI APS 450 | <<locked>> | 80% | 52,620 psi | 82% | 2100 fps | 100% |
| ADI AR 2205 | <<locked>> | 80% | 41,118 psi | 64% | 2539 fps | 100% |
| ADI AR 2207 | <<locked>> | 80% | 25,933 psi | 41% | 2372 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 96% | 34,867 psi | 55% | 2621 fps | 95.1% |
| Alliant Reloder-7 | <<locked>> | 86% | 33,170 psi | 52% | 2507 fps | 95% |
| Hodgdon LilGun | <<locked>> | 80% | 52,069 psi | 82% | 2808 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,350 psi | 33% | 1506 fps | 100% |
| IMR 4198 | <<locked>> | 90% | 32,793 psi | 51% | 2493 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 33,330 psi | 52% | 2464 fps | 97.1% |
| Lovex D060 | 19.7 gr | 80% | 41,031 psi | 64% | 2638 fps | 97.4% |
| Lovex D063 | <<locked>> | 80% | 40,495 psi | 63% | 2605 fps | 98% |
| Lovex S040 | <<locked>> | 80% | 50,546 psi | 79% | 2671 fps | 100% |
| Lovex S053 | <<locked>> | 80% | 32,416 psi | 51% | 2448 fps | 99.4% |
| Norma 200 | <<locked>> | 90% | 32,619 psi | 51% | 2556 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 20,827 psi | 33% | 1535 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 32,039 psi | 50% | 2477 fps | 96.5% |
| Shooters World Blackout | <<locked>> | 80% | 45,194 psi | 71% | 2707 fps | 98.4% |
| Shooters World Buffalo Rifle | 19.7 gr | 80% | 41,031 psi | 64% | 2638 fps | 97.4% |
| Shooters World SOCOM | <<locked>> | 80% | 40,495 psi | 63% | 2605 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 30,719 psi | 48% | 2303 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 38,464 psi | 60% | 2520 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 26,266 psi | 41% | 2352 fps | 97.2% |
| Vihtavuori N130 | <<locked>> | 98% | 36,172 psi | 57% | 2575 fps | 95% |
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 40 powders for 7 x 44 Penna loaded with the .277 | 90gr | Speer TNT HP. ReloadSwiss RS 36 delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,907 fps. Accurate 2015 gives the best case fill at 100 %, and 40 of the 40 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 90.0 gr projectile in 0.277" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate LT-30, Accurate LT-32 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, Accurate 5744 rank at the top here: for 7 x 44 Penna with the .277 | 90gr | Speer TNT HP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2015, Accurate LT-32, ADI AR 2219 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.