Load Specifications
Load data in caliber 6.5 x 52 R K&S with .264 | 155gr | Sierra HPBT LR MatchKing bullet and 49 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% | 41,945 psi | 89% | 2195 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 37,942 psi | 80% | 2224 fps | 95.8% |
| Accurate 4064 | <<locked>> | 84% | 42,192 psi | 90% | 2234 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 40,756 psi | 86% | 2287 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 41,466 psi | 88% | 2211 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 41,495 psi | 88% | 2329 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,031 psi | 87% | 2234 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 41,133 psi | 87% | 2238 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,509 psi | 86% | 2293 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 40,509 psi | 86% | 2320 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,767 psi | 78% | 2254 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,611 psi | 86% | 2385 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 40,712 psi | 86% | 2241 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 41,611 psi | 88% | 2244 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 42,366 psi | 90% | 2287 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 41,814 psi | 89% | 2280 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 75% | 1427 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,901 psi | 87% | 2195 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 41,495 psi | 88% | 2283 fps | 98.5% |
| IMR 4895 | <<locked>> | 82% | 42,105 psi | 89% | 2264 fps | 99.4% |
| Lovex S062 | <<locked>> | 82% | 40,843 psi | 87% | 2201 fps | 99.7% |
| Lovex S065 | <<locked>> | 88% | 40,205 psi | 85% | 2198 fps | 96.7% |
| Norma 203B | <<locked>> | 82% | 40,480 psi | 86% | 2231 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 40,698 psi | 86% | 2280 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 82% | 40,045 psi | 85% | 2244 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 42,337 psi | 90% | 2316 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 76% | 1463 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,945 psi | 89% | 2224 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 40,161 psi | 85% | 2316 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,219 psi | 85% | 2300 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,770 psi | 86% | 2316 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 42,598 psi | 90% | 2211 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 40,596 psi | 86% | 2231 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 40,205 psi | 85% | 2198 fps | 96.7% |
| Shooters World Precision | <<locked>> | 82% | 40,843 psi | 87% | 2201 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 41,713 psi | 88% | 2280 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 40,741 psi | 86% | 2129 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,032 psi | 89% | 2192 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 41,539 psi | 88% | 2238 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 41,394 psi | 88% | 2333 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 42,148 psi | 89% | 2192 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,583 psi | 90% | 2198 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,177 psi | 89% | 2221 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 40,219 psi | 85% | 2238 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 41,191 psi | 87% | 2198 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 42,076 psi | 89% | 2287 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,784 psi | 84% | 2316 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 40,263 psi | 85% | 2221 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,750 psi | 69% | 2247 fps | 98.5% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 39,262 psi | 83% | 2156 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 35,476 psi | 75% | 2178 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 37,144 psi | 79% | 2152 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 30,748 psi | 65% | 2093 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 36,535 psi | 78% | 2123 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,957 psi | 83% | 2280 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,129 psi | 77% | 2146 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,595 psi | 82% | 2195 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,879 psi | 68% | 2110 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,995 psi | 66% | 2119 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,369 psi | 58% | 2031 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,025 psi | 70% | 2221 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 35,737 psi | 76% | 2152 fps | 99% |
| Hodgdon H380 | <<locked>> | 80% | 36,622 psi | 78% | 2152 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,325 psi | 58% | 1978 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,204 psi | 83% | 2238 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 56% | 1280 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,348 psi | 81% | 2149 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 30,298 psi | 64% | 2064 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,494 psi | 84% | 2218 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,363 psi | 81% | 2156 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 35,520 psi | 75% | 2110 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 38,014 psi | 81% | 2185 fps | 98.7% |
| Norma URP | <<locked>> | 84% | 31,502 psi | 67% | 2096 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,565 psi | 80% | 2201 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 37,507 psi | 80% | 2224 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,556 psi | 56% | 1302 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,392 psi | 84% | 2182 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,011 psi | 70% | 2175 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,953 psi | 70% | 2159 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,708 psi | 76% | 2215 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 40,016 psi | 85% | 2165 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,402 psi | 71% | 2100 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 35,520 psi | 75% | 2110 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 38,363 psi | 81% | 2156 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,534 psi | 73% | 2146 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,100 psi | 77% | 2054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 39,363 psi | 84% | 2146 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 34,316 psi | 73% | 2103 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 24,961 psi | 53% | 1969 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 39,436 psi | 84% | 2149 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,943 psi | 85% | 2159 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,576 psi | 69% | 2051 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 84% | 32,909 psi | 70% | 2096 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,725 psi | 82% | 2159 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,401 psi | 69% | 2103 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 28,848 psi | 61% | 2090 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,095 psi | 62% | 1995 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 27,151 psi | 58% | 2087 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 75 powders for 6.5 x 52 R K&S loaded with the .264 | 155gr | Sierra HPBT LR MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,385 fps; across all powders the maximum-charge window runs from 1,427 fps to 2,385 fps. Accurate 3100 gives the best case fill at 100 %, and 75 of the 75 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (325 MPa), the top charges use 67–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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 High Country, 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.