Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Barnes X S bullet and 40 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Alliant Reloder-17 and ReloadSwiss RS 62.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 82% | 41,510 psi | 88% | 2323 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,423 psi | 88% | 2395 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 84% | 41,655 psi | 88% | 2316 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,829 psi | 89% | 2431 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,423 psi | 88% | 2343 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,959 psi | 89% | 2352 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,814 psi | 87% | 2392 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 40,857 psi | 87% | 2421 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,304 psi | 79% | 2352 fps | 97.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,017 psi | 87% | 2480 fps | 96.5% |
| Bofors RP3 | <<locked>> | 84% | 41,408 psi | 88% | 2352 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 84% | 42,409 psi | 90% | 2352 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,525 psi | 90% | 2388 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,148 psi | 89% | 2392 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 75% | 1509 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 41,263 psi | 88% | 2300 fps | 98% |
| IMR 4831 | <<locked>> | 94% | 42,250 psi | 90% | 2395 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 41,611 psi | 88% | 2313 fps | 99.3% |
| Lovex S065 | <<locked>> | 88% | 41,075 psi | 87% | 2303 fps | 95.7% |
| Norma 203B | <<locked>> | 82% | 41,321 psi | 88% | 2343 fps | 98.5% |
| Norma URP | <<locked>> | 92% | 41,089 psi | 87% | 2385 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 82% | 40,480 psi | 86% | 2352 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 77% | 1549 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 40,553 psi | 86% | 2428 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,582 psi | 86% | 2405 fps | 96.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,930 psi | 87% | 2411 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 86% | 41,640 psi | 88% | 2349 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,075 psi | 87% | 2303 fps | 95.7% |
| Shooters World Precision | <<locked>> | 82% | 41,611 psi | 88% | 2313 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,018 psi | 89% | 2385 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 41,481 psi | 88% | 2244 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,438 psi | 90% | 2352 fps | 99% |
| Somchem S365 | <<locked>> | 96% | 41,597 psi | 88% | 2438 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 86% | 40,277 psi | 85% | 2290 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 90% | 40,582 psi | 86% | 2343 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 82% | 41,568 psi | 88% | 2306 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 42,337 psi | 90% | 2392 fps | 97.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,089 psi | 85% | 2425 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 40,495 psi | 86% | 2320 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,779 psi | 72% | 2346 fps | 97.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 80% | 39,189 psi | 83% | 2280 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,171 psi | 72% | 2254 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 37,101 psi | 79% | 2228 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,102 psi | 83% | 2375 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,912 psi | 78% | 2254 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,566 psi | 84% | 2306 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,505 psi | 73% | 2254 fps | 95.1% |
| Alliant Reloder-17 | 30 gr | 80% | 32,024 psi | 68% | 2224 fps | 96% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,879 psi | 68% | 2224 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 38,421 psi | 82% | 2425 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 36,811 psi | 78% | 2264 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 80% | 37,434 psi | 79% | 2257 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,052 psi | 64% | 2123 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,769 psi | 84% | 2349 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 56% | 1345 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,899 psi | 83% | 2254 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 35,041 psi | 74% | 2257 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 39,291 psi | 83% | 2270 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 38,856 psi | 82% | 2260 fps | 95% |
| Norma 203B | <<locked>> | 80% | 38,972 psi | 83% | 2300 fps | 98% |
| Norma URP | <<locked>> | 86% | 34,476 psi | 73% | 2251 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,884 psi | 80% | 2303 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,064 psi | 57% | 1381 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,924 psi | 72% | 2283 fps | 99% |
| ReloadSwiss RS 62 | 32.9 gr | 88% | 35,839 psi | 76% | 2310 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,377 psi | 81% | 2356 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 34,882 psi | 74% | 2218 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,856 psi | 82% | 2260 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 39,291 psi | 83% | 2270 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,099 psi | 74% | 2247 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,782 psi | 78% | 2162 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,679 psi | 76% | 2221 fps | 97.6% |
| Somchem S365 | 29.1 gr | 82% | 27,746 psi | 59% | 2116 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 33,794 psi | 72% | 2165 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 35,882 psi | 76% | 2247 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 39,262 psi | 83% | 2267 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 35,389 psi | 75% | 2254 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 92% | 31,879 psi | 68% | 2244 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,139 psi | 64% | 2093 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 31,937 psi | 68% | 2293 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 40 powders for 6.5 x 52 R K&S loaded with the .264 | 140gr | Barnes X S. Alliant Reloder-26 delivers the highest muzzle velocity at 2,480 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,480 fps. Alliant Reloder-23 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 (325 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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. Somchem S365, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 6.5 x 52 R K&S with the .264 | 140gr | 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.