Load Specifications
Load data in caliber .369 N.E. Purdey with .375 | 270gr | Impala RNFP KO bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N555, ReloadSwiss RS 62 and Alliant Reloder-16.
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>> | 88% | 39,871 psi | 90% | 2513 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 39,088 psi | 88% | 2513 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 38,856 psi | 88% | 2536 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 98% | 38,218 psi | 86% | 2526 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 39,421 psi | 89% | 2612 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 38,580 psi | 87% | 2464 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 81% | 1624 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 38,189 psi | 86% | 2464 fps | 97.4% |
| Lovex S065 | <<locked>> | 84% | 39,189 psi | 89% | 2415 fps | 96% |
| Norma URP | <<locked>> | 88% | 39,465 psi | 89% | 2503 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 83% | 1667 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 38,682 psi | 87% | 2543 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 39,204 psi | 89% | 2526 fps | 97.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 39,001 psi | 88% | 2530 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 39,871 psi | 90% | 2457 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,189 psi | 89% | 2415 fps | 96% |
| Somchem S365 | <<locked>> | 90% | 37,826 psi | 86% | 2513 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 38,435 psi | 87% | 2398 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 86% | 38,783 psi | 88% | 2454 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 86% | 38,247 psi | 86% | 2457 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 96% | 39,291 psi | 89% | 2552 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 38,464 psi | 87% | 2428 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,651 psi | 83% | 2589 fps | 99.3% |
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>> | 82% | 32,996 psi | 75% | 2365 fps | 95.6% |
| Alliant Reloder-16 | 65.3 gr | 82% | 33,011 psi | 75% | 2365 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,345 psi | 78% | 2431 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,109 psi | 66% | 2293 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,838 psi | 79% | 2500 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,805 psi | 65% | 2228 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 61% | 1450 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 31,981 psi | 72% | 2323 fps | 95.3% |
| Lovex S065 | <<locked>> | 82% | 37,057 psi | 84% | 2369 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 33,054 psi | 75% | 2359 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,485 psi | 62% | 1490 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,361 psi | 82% | 2490 fps | 99.9% |
| ReloadSwiss RS 62 | 71.9 gr | 84% | 34,519 psi | 78% | 2425 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,738 psi | 83% | 2477 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 37,594 psi | 85% | 2411 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,057 psi | 84% | 2369 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 28,239 psi | 64% | 2270 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 36,245 psi | 82% | 2352 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 32,372 psi | 73% | 2310 fps | 95% |
| Vihtavuori N550 | <<locked>> | 82% | 33,968 psi | 77% | 2362 fps | 95.5% |
| Vihtavuori N555 | 70.5 gr | 88% | 31,111 psi | 70% | 2362 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,155 psi | 73% | 2287 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,066 psi | 66% | 2365 fps | 95.9% |
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 23 powders for .369 N.E. Purdey loaded with the .375 | 270gr | Impala RNFP KO. Alliant Reloder-26 delivers the highest muzzle velocity at 2,612 fps; across all powders the maximum-charge window runs from 1,624 fps to 2,612 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 23 of the 23 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 81–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Winchester StaBALL HD 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. Vihtavuori N555, ReloadSwiss RS 62, Alliant Reloder-16 rank at the top here: for .369 N.E. Purdey with the .375 | 270gr | Impala RNFP KO 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.