Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Lapua Naturalis bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 62, Alliant Reloder-16 and Somchem S365.
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% | 41,727 psi | 89% | 2306 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,800 psi | 89% | 2343 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,047 psi | 89% | 2418 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 84% | 40,611 psi | 86% | 2306 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,350 psi | 86% | 2411 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,641 psi | 90% | 2375 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,335 psi | 86% | 2333 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,119 psi | 89% | 2428 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,018 psi | 89% | 2457 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,027 psi | 76% | 2336 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,581 psi | 84% | 2461 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 42,424 psi | 90% | 2379 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 84% | 40,712 psi | 86% | 2336 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 40,959 psi | 87% | 2372 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 40,596 psi | 86% | 2375 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 75% | 1512 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,656 psi | 90% | 2336 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 40,451 psi | 86% | 2375 fps | 97.2% |
| IMR 4895 | <<locked>> | 82% | 41,249 psi | 88% | 2362 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 42,424 psi | 90% | 2336 fps | 99.5% |
| Lovex S065 | <<locked>> | 90% | 41,785 psi | 89% | 2329 fps | 95.9% |
| Norma 203B | <<locked>> | 84% | 42,511 psi | 90% | 2375 fps | 98.7% |
| Norma URP | <<locked>> | 94% | 42,264 psi | 90% | 2418 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 84% | 41,669 psi | 88% | 2385 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 76% | 1549 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,018 psi | 89% | 2425 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 41,800 psi | 89% | 2461 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 41,524 psi | 88% | 2434 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,163 psi | 89% | 2444 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 82% | 42,163 psi | 89% | 2310 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 88% | 42,293 psi | 90% | 2372 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,785 psi | 89% | 2329 fps | 95.9% |
| Shooters World Precision | <<locked>> | 84% | 42,424 psi | 90% | 2336 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,799 psi | 87% | 2375 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 42,554 psi | 90% | 2270 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 40,727 psi | 86% | 2333 fps | 98.7% |
| Somchem S365 | <<locked>> | 96% | 40,292 psi | 85% | 2425 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 82% | 41,046 psi | 87% | 2290 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,727 psi | 89% | 2300 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,133 psi | 87% | 2316 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 92% | 41,423 psi | 88% | 2365 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 82% | 40,364 psi | 86% | 2297 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,683 psi | 86% | 2372 fps | 96.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,595 psi | 82% | 2405 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 41,669 psi | 88% | 2349 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,169 psi | 68% | 2313 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 42,366 psi | 90% | 2369 fps | 99% |
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 2495 | <<locked>> | 80% | 39,204 psi | 83% | 2267 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 37,057 psi | 79% | 2257 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 34,679 psi | 74% | 2277 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 36,013 psi | 76% | 2215 fps | 96.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,043 psi | 81% | 2365 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,592 psi | 76% | 2238 fps | 98% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,956 psi | 81% | 2287 fps | 97.2% |
| Alliant Reloder-16 | 30.7 gr | 88% | 35,360 psi | 75% | 2287 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,632 psi | 65% | 2198 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,356 psi | 64% | 2195 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,999 psi | 78% | 2405 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 34,954 psi | 74% | 2238 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 80% | 35,781 psi | 76% | 2234 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,618 psi | 65% | 2152 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,261 psi | 81% | 2329 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 56% | 1345 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,797 psi | 80% | 2244 fps | 97.2% |
| IMR 4831 | <<locked>> | 88% | 33,692 psi | 71% | 2238 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 38,841 psi | 82% | 2316 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 37,608 psi | 80% | 2251 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 39,465 psi | 84% | 2287 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 37,362 psi | 79% | 2280 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 34,983 psi | 74% | 2274 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,724 psi | 78% | 2287 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 57% | 1378 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,479 psi | 84% | 2379 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,474 psi | 69% | 2257 fps | 98.7% |
| ReloadSwiss RS 62 | 33.7 gr | 90% | 36,564 psi | 78% | 2336 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,740 psi | 84% | 2395 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 39,711 psi | 84% | 2267 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 33,083 psi | 70% | 2192 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,465 psi | 84% | 2287 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 37,608 psi | 80% | 2251 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,910 psi | 72% | 2234 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,679 psi | 76% | 2156 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 34,011 psi | 72% | 2198 fps | 97.1% |
| Somchem S365 | 29.2 gr | 82% | 26,455 psi | 56% | 2093 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 38,856 psi | 82% | 2254 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,291 psi | 83% | 2257 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,213 psi | 68% | 2142 fps | 97.9% |
| Vihtavuori N160 | <<locked>> | 86% | 34,592 psi | 73% | 2231 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 37,739 psi | 80% | 2251 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,100 psi | 77% | 2280 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 94% | 32,285 psi | 68% | 2267 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,676 psi | 65% | 2119 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,414 psi | 65% | 2260 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,914 psi | 85% | 2323 fps | 98.6% |
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 47 powders for 6.5 x 52 R K&S loaded with the .264 | 140gr | Lapua Naturalis. Alliant Reloder-26 delivers the highest muzzle velocity at 2,461 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,461 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 68–90 %, 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. ReloadSwiss RS 62, Alliant Reloder-16, Somchem S365 rank at the top here: for 6.5 x 52 R K&S with the .264 | 140gr | Lapua Naturalis 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.