Load Specifications
Load data in caliber 6.5 x 52 R K&S with .263 | 140gr | Prvi Partizan PSP bullet and 47 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 40,915 psi | 87% | 2323 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,046 psi | 87% | 2359 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,061 psi | 89% | 2448 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 84% | 40,538 psi | 86% | 2333 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,422 psi | 86% | 2444 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,409 psi | 90% | 2395 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,089 psi | 85% | 2356 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,018 psi | 89% | 2457 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,119 psi | 89% | 2487 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,708 psi | 76% | 2359 fps | 97.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,349 psi | 83% | 2490 fps | 96.5% |
| Bofors RP3 | <<locked>> | 86% | 42,221 psi | 90% | 2405 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 84% | 40,596 psi | 86% | 2359 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,118 psi | 87% | 2402 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,770 psi | 86% | 2405 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 74% | 1526 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,554 psi | 90% | 2359 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 40,538 psi | 86% | 2402 fps | 97.6% |
| IMR 4895 | <<locked>> | 82% | 41,060 psi | 87% | 2385 fps | 98.7% |
| Lovex S062 | <<locked>> | 84% | 42,119 psi | 89% | 2359 fps | 99.6% |
| Lovex S065 | <<locked>> | 90% | 41,597 psi | 88% | 2352 fps | 96.2% |
| Norma 203B | <<locked>> | 84% | 42,250 psi | 90% | 2398 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 42,090 psi | 89% | 2441 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 84% | 41,684 psi | 88% | 2411 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 76% | 1565 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 41,916 psi | 89% | 2451 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,003 psi | 89% | 2490 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,800 psi | 89% | 2467 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,351 psi | 90% | 2477 fps | 96.9% |
| Rottweil R 902 | <<locked>> | 82% | 41,524 psi | 88% | 2329 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 88% | 42,090 psi | 89% | 2395 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,597 psi | 88% | 2352 fps | 96.2% |
| Shooters World Precision | <<locked>> | 84% | 42,119 psi | 89% | 2359 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,828 psi | 87% | 2402 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,569 psi | 90% | 2297 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 40,350 psi | 86% | 2352 fps | 98.9% |
| Somchem S365 | <<locked>> | 96% | 40,306 psi | 86% | 2451 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 41,017 psi | 87% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,655 psi | 88% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,075 psi | 87% | 2339 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 92% | 41,684 psi | 88% | 2398 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 82% | 40,059 psi | 85% | 2316 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,712 psi | 86% | 2398 fps | 97.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,377 psi | 81% | 2428 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,887 psi | 89% | 2382 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,039 psi | 68% | 2346 fps | 96.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,496 psi | 90% | 2395 fps | 99.2% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 38,087 psi | 81% | 2274 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,027 psi | 76% | 2267 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,345 psi | 73% | 2297 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 35,694 psi | 76% | 2234 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,753 psi | 80% | 2388 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,070 psi | 74% | 2254 fps | 98.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,782 psi | 80% | 2313 fps | 97.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,969 psi | 74% | 2306 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,110 psi | 64% | 2215 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,791 psi | 63% | 2211 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,724 psi | 78% | 2428 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 34,490 psi | 73% | 2257 fps | 98.1% |
| Hodgdon H380 | <<locked>> | 80% | 35,404 psi | 75% | 2257 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,124 psi | 64% | 2169 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,072 psi | 81% | 2352 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,078 psi | 55% | 1362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,420 psi | 79% | 2264 fps | 97.4% |
| IMR 4831 | <<locked>> | 88% | 33,446 psi | 71% | 2260 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,667 psi | 82% | 2339 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 37,391 psi | 79% | 2274 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,233 psi | 83% | 2310 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 37,173 psi | 79% | 2303 fps | 97.8% |
| Norma URP | <<locked>> | 88% | 34,838 psi | 74% | 2297 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,405 psi | 77% | 2310 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 56% | 1394 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,349 psi | 83% | 2402 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,039 psi | 68% | 2277 fps | 98.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,084 psi | 72% | 2306 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,043 psi | 79% | 2369 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 39,073 psi | 83% | 2283 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,619 psi | 69% | 2208 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,233 psi | 83% | 2310 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 37,391 psi | 79% | 2274 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,591 psi | 71% | 2254 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,389 psi | 75% | 2172 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,359 psi | 71% | 2211 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 25,875 psi | 55% | 2106 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 38,508 psi | 82% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,175 psi | 83% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,850 psi | 68% | 2162 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 34,171 psi | 72% | 2251 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 37,478 psi | 80% | 2270 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 35,868 psi | 76% | 2303 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 94% | 31,720 psi | 67% | 2280 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,313 psi | 64% | 2139 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,008 psi | 64% | 2283 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,711 psi | 84% | 2346 fps | 98.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 73 powders for 6.5 x 52 R K&S loaded with the .263 | 140gr | Prvi Partizan PSP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,490 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,490 fps. Accurate 3100 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 (325 MPa), the top charges use 64–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.263" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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 2700, Accurate 3100, ADI AR 2209 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.