Load Specifications
Load data in caliber .369 N.E. Purdey with .375 | 300gr | Speer TBBC bullet and 33 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 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 3100 | <<locked>> | 98% | 39,320 psi | 89% | 2385 fps | 97.1% |
| Accurate 4350 | <<locked>> | 88% | 38,986 psi | 88% | 2388 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 88% | 38,725 psi | 88% | 2402 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 38,334 psi | 87% | 2418 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 37,695 psi | 85% | 2411 fps | 99.5% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,433 psi | 80% | 2369 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,899 psi | 88% | 2500 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 38,885 psi | 88% | 2385 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 38,058 psi | 86% | 2346 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,694 psi | 81% | 1535 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 37,652 psi | 85% | 2349 fps | 98.3% |
| Lovex S065 | <<locked>> | 84% | 38,305 psi | 87% | 2297 fps | 97% |
| Lovex S070 | <<locked>> | 86% | 38,653 psi | 87% | 2323 fps | 95.9% |
| Norma URP | <<locked>> | 88% | 39,117 psi | 88% | 2388 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 38,043 psi | 86% | 2375 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,172 psi | 82% | 1572 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 38,159 psi | 86% | 2421 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 38,638 psi | 87% | 2408 fps | 98.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 38,493 psi | 87% | 2418 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 38,827 psi | 88% | 2333 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 38,305 psi | 87% | 2297 fps | 97% |
| Shooters World SW4350 | <<locked>> | 86% | 38,653 psi | 87% | 2323 fps | 95.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 39,856 psi | 90% | 2382 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,016 psi | 90% | 2293 fps | 96.1% |
| Somchem S355 | <<locked>> | 82% | 39,581 psi | 89% | 2336 fps | 99.6% |
| Somchem S365 | <<locked>> | 92% | 39,769 psi | 90% | 2441 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 37,681 psi | 85% | 2277 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 86% | 38,203 psi | 86% | 2336 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 86% | 37,594 psi | 85% | 2343 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 96% | 38,653 psi | 87% | 2431 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 38,014 psi | 86% | 2320 fps | 99.5% |
| Winchester 760 | <<locked>> | 86% | 39,044 psi | 88% | 2388 fps | 95.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,926 psi | 81% | 2480 fps | 99.9% |
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 3100 | <<locked>> | 94% | 34,200 psi | 77% | 2283 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 29,660 psi | 67% | 2192 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,342 psi | 69% | 2205 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,634 psi | 76% | 2316 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,237 psi | 59% | 2126 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,344 psi | 75% | 2316 fps | 95.2% |
| Alliant Reloder-26 | 77.5 gr | 90% | 31,662 psi | 72% | 2329 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 84% | 36,492 psi | 82% | 2336 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,731 psi | 63% | 2113 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 60% | 1371 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 28,935 psi | 65% | 2156 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 33,779 psi | 76% | 2201 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 36,289 psi | 82% | 2277 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 30,153 psi | 68% | 2192 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 86% | 35,766 psi | 81% | 2326 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 61% | 1404 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,795 psi | 81% | 2372 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,501 psi | 67% | 2205 fps | 95.1% |
| ReloadSwiss RS 70 | 71.7 gr | 84% | 33,750 psi | 76% | 2310 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 36,376 psi | 82% | 2287 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,779 psi | 76% | 2201 fps | 95.5% |
| Shooters World SW4350 | <<locked>> | 84% | 36,289 psi | 82% | 2277 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,231 psi | 84% | 2333 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 37,550 psi | 85% | 2244 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 37,144 psi | 84% | 2290 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 27,108 psi | 61% | 2156 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 80% | 35,317 psi | 80% | 2231 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 31,459 psi | 71% | 2195 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 80% | 30,937 psi | 70% | 2198 fps | 95.7% |
| Vihtavuori N555 | 67.6 gr | 86% | 28,079 psi | 63% | 2195 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,212 psi | 71% | 2175 fps | 98.1% |
| Winchester 760 | <<locked>> | 84% | 36,651 psi | 83% | 2339 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,165 psi | 59% | 2198 fps | 96.1% |
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 33 powders for .369 N.E. Purdey loaded with the .375 | 300gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,500 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 33 of the 33 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 80–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, 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-26, ReloadSwiss RS 70, Vihtavuori N555 rank at the top here: for .369 N.E. Purdey with the .375 | 300gr | Speer TBBC 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.