Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 144gr | Lapua FMJ Boat Tail bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 and Alliant Reloder-17.
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 2495 | <<locked>> | 82% | 41,205 psi | 87% | 2287 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 41,321 psi | 88% | 2326 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,293 psi | 90% | 2411 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 84% | 40,756 psi | 86% | 2300 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 40,770 psi | 86% | 2411 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 40,219 psi | 85% | 2320 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,393 psi | 86% | 2326 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,105 psi | 89% | 2421 fps | 98.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,322 psi | 90% | 2451 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,926 psi | 76% | 2329 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,798 psi | 84% | 2461 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 42,612 psi | 90% | 2372 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 40,640 psi | 86% | 2323 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 41,278 psi | 88% | 2365 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,147 psi | 87% | 2372 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,085 psi | 74% | 1496 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,321 psi | 86% | 2283 fps | 98.3% |
| IMR 4831 | <<locked>> | 94% | 40,727 psi | 86% | 2369 fps | 97.8% |
| IMR 4895 | <<locked>> | 82% | 41,336 psi | 88% | 2352 fps | 98.9% |
| Lovex S062 | <<locked>> | 84% | 42,380 psi | 90% | 2326 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 42,018 psi | 89% | 2326 fps | 96.6% |
| Norma 203B | <<locked>> | 84% | 42,583 psi | 90% | 2365 fps | 99.1% |
| Norma URP | <<locked>> | 94% | 42,627 psi | 90% | 2415 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 84% | 42,105 psi | 89% | 2382 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 41,814 psi | 89% | 2405 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 76% | 1539 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,308 psi | 90% | 2418 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,134 psi | 89% | 2454 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,163 psi | 89% | 2434 fps | 97.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,627 psi | 90% | 2448 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 42,061 psi | 89% | 2300 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 88% | 42,554 psi | 90% | 2365 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 42,018 psi | 89% | 2326 fps | 96.6% |
| Shooters World Precision | <<locked>> | 84% | 42,380 psi | 90% | 2326 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,886 psi | 87% | 2365 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 40,205 psi | 85% | 2221 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 40,669 psi | 86% | 2320 fps | 99.1% |
| Somchem S365 | <<locked>> | 96% | 40,524 psi | 86% | 2418 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 82% | 41,205 psi | 87% | 2280 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 41,858 psi | 89% | 2290 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 41,495 psi | 88% | 2310 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 41,814 psi | 89% | 2362 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 40,335 psi | 86% | 2283 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 40,915 psi | 87% | 2365 fps | 97.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,711 psi | 82% | 2395 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,148 psi | 89% | 2349 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,053 psi | 68% | 2313 fps | 97.3% |
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% | 38,638 psi | 82% | 2244 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,550 psi | 78% | 2241 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,271 psi | 68% | 2218 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,143 psi | 77% | 2208 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,072 psi | 81% | 2359 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,259 psi | 75% | 2224 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,000 psi | 81% | 2280 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,243 psi | 71% | 2231 fps | 95.3% |
| Alliant Reloder-17 | 30.7 gr | 80% | 30,342 psi | 64% | 2188 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,153 psi | 64% | 2188 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,130 psi | 79% | 2405 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 34,708 psi | 74% | 2224 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 80% | 35,940 psi | 76% | 2231 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,587 psi | 61% | 2096 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,363 psi | 81% | 2320 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 56% | 1339 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,884 psi | 80% | 2238 fps | 97.7% |
| IMR 4831 | <<locked>> | 88% | 33,489 psi | 71% | 2228 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,914 psi | 83% | 2306 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,550 psi | 80% | 2238 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 36,999 psi | 78% | 2231 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 37,391 psi | 79% | 2270 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 33,083 psi | 70% | 2224 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,724 psi | 78% | 2280 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 92% | 39,117 psi | 83% | 2352 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 57% | 1375 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,682 psi | 84% | 2372 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,285 psi | 68% | 2251 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,476 psi | 73% | 2283 fps | 95.5% |
| ReloadSwiss RS 70 | 35.1 gr | 90% | 37,246 psi | 79% | 2339 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 39,595 psi | 84% | 2257 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,793 psi | 70% | 2178 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 36,999 psi | 78% | 2231 fps | 95.1% |
| Shooters World Precision | <<locked>> | 80% | 37,550 psi | 80% | 2238 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,823 psi | 72% | 2224 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,476 psi | 75% | 2139 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 33,866 psi | 72% | 2188 fps | 97.6% |
| Somchem S365 | 29.9 gr | 82% | 26,049 psi | 55% | 2080 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 38,682 psi | 82% | 2241 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,392 psi | 84% | 2247 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,053 psi | 68% | 2129 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 34,476 psi | 73% | 2221 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,000 psi | 81% | 2244 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 33,852 psi | 72% | 2224 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 92% | 30,226 psi | 64% | 2211 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,427 psi | 60% | 2060 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,255 psi | 64% | 2260 fps | 96.3% |
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 | 144gr | Lapua FMJ Boat Tail. Alliant Reloder-26 delivers the highest muzzle velocity at 2,461 fps; across all powders the maximum-charge window runs from 1,496 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 144.0 gr projectile in 0.264" calls for a 1:9.5 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, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 6.5 x 52 R K&S with the .264 | 144gr | Lapua FMJ Boat Tail 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.