Load Specifications
Load data in caliber .369 N.E. Purdey with .375 | 250gr | Barnes X S bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, Somchem S365 and Vihtavuori N555.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4350 | <<locked>> | 90% | 39,798 psi | 90% | 2608 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 39,958 psi | 90% | 2556 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 39,450 psi | 89% | 2612 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 39,204 psi | 89% | 2638 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,406 psi | 87% | 2618 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,726 psi | 90% | 2703 fps | 96.1% |
| Bofors RP3 | <<locked>> | 82% | 40,030 psi | 90% | 2569 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 38,711 psi | 88% | 2559 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 81% | 1690 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 38,363 psi | 87% | 2562 fps | 96.6% |
| Norma URP | <<locked>> | 90% | 39,639 psi | 90% | 2602 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 82% | 1732 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 39,146 psi | 88% | 2648 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 39,320 psi | 89% | 2625 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 37,782 psi | 85% | 2513 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 38,072 psi | 86% | 2552 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 39,740 psi | 90% | 2451 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 38,508 psi | 87% | 2516 fps | 98.2% |
| Somchem S365 | <<locked>> | 92% | 38,029 psi | 86% | 2612 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 38,769 psi | 88% | 2497 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 88% | 38,986 psi | 88% | 2549 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 88% | 38,522 psi | 87% | 2556 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 98% | 39,189 psi | 89% | 2648 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 38,957 psi | 88% | 2526 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,708 psi | 78% | 2615 fps | 97.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4350 | <<locked>> | 86% | 35,099 psi | 79% | 2507 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,681 psi | 85% | 2507 fps | 98.3% |
| Alliant Reloder-16 | 69.2 gr | 86% | 35,259 psi | 80% | 2510 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,663 psi | 74% | 2474 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,777 psi | 70% | 2421 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 37,231 psi | 84% | 2644 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 37,594 psi | 85% | 2516 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,748 psi | 70% | 2365 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 61% | 1512 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 34,055 psi | 77% | 2464 fps | 95.1% |
| Norma URP | <<locked>> | 86% | 35,302 psi | 80% | 2503 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 61% | 1549 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,563 psi | 78% | 2536 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,970 psi | 84% | 2569 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,636 psi | 81% | 2467 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,839 psi | 81% | 2500 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,550 psi | 85% | 2408 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 36,230 psi | 82% | 2467 fps | 97.6% |
| Somchem S365 | 65.7 gr | 80% | 26,818 psi | 61% | 2306 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 34,461 psi | 78% | 2405 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 86% | 36,680 psi | 83% | 2500 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 86% | 36,274 psi | 82% | 2507 fps | 95.3% |
| Vihtavuori N555 | 74.5 gr | 92% | 32,822 psi | 74% | 2497 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,632 psi | 69% | 2326 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,908 psi | 70% | 2493 fps | 95.5% |
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 25 powders for .369 N.E. Purdey loaded with the .375 | 250gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,690 fps to 2,703 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 25 of the 25 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 78–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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. Alliant Reloder-16, Somchem S365, Vihtavuori N555 rank at the top here: for .369 N.E. Purdey with the .375 | 250gr | Barnes X S they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.