Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 140gr | Speer Deep Curl Soft Point bullet and 46 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 40,930 psi | 87% | 2323 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,394 psi | 88% | 2365 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,395 psi | 90% | 2454 fps | 98% |
| ADI AR 2208 | <<locked>> | 84% | 40,524 psi | 86% | 2333 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,698 psi | 86% | 2451 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 39,929 psi | 85% | 2352 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,451 psi | 86% | 2365 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,293 psi | 90% | 2464 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,032 psi | 89% | 2487 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,926 psi | 76% | 2365 fps | 97.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,856 psi | 85% | 2500 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 42,540 psi | 90% | 2411 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 84% | 40,567 psi | 86% | 2362 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,408 psi | 88% | 2408 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,075 psi | 87% | 2411 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,172 psi | 75% | 1529 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 42,540 psi | 90% | 2362 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 40,843 psi | 87% | 2408 fps | 97.7% |
| IMR 4895 | <<locked>> | 82% | 41,394 psi | 88% | 2392 fps | 98.8% |
| Lovex S062 | <<locked>> | 84% | 42,467 psi | 90% | 2369 fps | 99.6% |
| Lovex S065 | <<locked>> | 90% | 41,887 psi | 89% | 2362 fps | 96.4% |
| Norma 203B | <<locked>> | 84% | 42,569 psi | 90% | 2405 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 42,366 psi | 90% | 2448 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 84% | 41,959 psi | 89% | 2418 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,810 psi | 76% | 1572 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,264 psi | 90% | 2457 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,235 psi | 90% | 2497 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,134 psi | 89% | 2474 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,554 psi | 90% | 2487 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 41,858 psi | 89% | 2336 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 88% | 42,438 psi | 90% | 2402 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,887 psi | 89% | 2362 fps | 96.4% |
| Shooters World Precision | <<locked>> | 84% | 42,467 psi | 90% | 2369 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,089 psi | 87% | 2408 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 39,987 psi | 85% | 2257 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 40,654 psi | 86% | 2359 fps | 98.9% |
| Somchem S365 | <<locked>> | 96% | 40,582 psi | 86% | 2457 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 41,017 psi | 87% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,959 psi | 89% | 2329 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,379 psi | 88% | 2346 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 92% | 41,582 psi | 88% | 2398 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 82% | 40,379 psi | 86% | 2323 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 41,002 psi | 87% | 2405 fps | 97.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,638 psi | 82% | 2434 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,119 psi | 89% | 2388 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,198 psi | 68% | 2352 fps | 97.1% |
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% | 38,435 psi | 82% | 2280 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,361 psi | 77% | 2277 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 34,664 psi | 74% | 2306 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 35,984 psi | 76% | 2244 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,029 psi | 81% | 2395 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,418 psi | 75% | 2264 fps | 98.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,116 psi | 81% | 2320 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,243 psi | 71% | 2267 fps | 95.1% |
| Alliant Reloder-17 | 31.4 gr | 80% | 30,342 psi | 64% | 2224 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,008 psi | 64% | 2221 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,927 psi | 78% | 2438 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 34,809 psi | 74% | 2267 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 80% | 35,694 psi | 76% | 2264 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,413 psi | 60% | 2126 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,377 psi | 81% | 2359 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 56% | 1365 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,739 psi | 80% | 2274 fps | 97.5% |
| IMR 4831 | <<locked>> | 88% | 33,417 psi | 71% | 2260 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,001 psi | 83% | 2349 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 37,391 psi | 79% | 2274 fps | 98.9% |
| Lovex S065 | <<locked>> | 88% | 39,204 psi | 83% | 2313 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 37,478 psi | 80% | 2310 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 35,085 psi | 74% | 2303 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,666 psi | 78% | 2316 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 56% | 1401 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,378 psi | 84% | 2405 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,314 psi | 69% | 2287 fps | 98.9% |
| ReloadSwiss RS 62 | 34.5 gr | 88% | 34,287 psi | 73% | 2316 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,260 psi | 79% | 2375 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 39,421 psi | 84% | 2293 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 80% | 32,634 psi | 69% | 2211 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,204 psi | 83% | 2313 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 37,391 psi | 79% | 2274 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,576 psi | 71% | 2254 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,389 psi | 75% | 2175 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,663 psi | 71% | 2218 fps | 97.3% |
| Somchem S365 | 30.5 gr | 82% | 25,875 psi | 55% | 2110 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 38,537 psi | 82% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,175 psi | 83% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,879 psi | 68% | 2162 fps | 98.1% |
| Vihtavuori N160 | <<locked>> | 86% | 34,461 psi | 73% | 2257 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 37,753 psi | 80% | 2277 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 36,114 psi | 77% | 2310 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 94% | 31,981 psi | 68% | 2290 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,413 psi | 60% | 2093 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,153 psi | 64% | 2290 fps | 95.8% |
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 46 powders for 6.5 x 52 R K&S loaded with the .264 | 140gr | Speer Deep Curl Soft Point. Alliant Reloder-26 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,529 fps to 2,500 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 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 1:10.5 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 | Speer Deep Curl Soft Point 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.