Load Specifications
Bullet:.264 | 156gr | RWS Evolution
Bullet Manufacturer:RWS
Bullet Weight:156 gr
Bullet Diameter:0.264"
Bullet Length:<<locked>>
Caliber:.260 Ackley Improved load data
Case Length (l3):2.03"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:56 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:10.5
Load data in caliber .260 Ackley Improved with .264 | 156gr | RWS Evolution bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-16.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 53,505 psi | 86% | 2431 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,679 psi | 88% | 2497 fps | 99.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,445 psi | 82% | 2539 fps | 99.7% |
| Accurate 4064 | <<locked>> | 84% | 53,563 psi | 86% | 2480 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,838 psi | 86% | 2579 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2720 fps | 98.3% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,171 psi | 85% | 2664 fps | 96.6% |
| ADI AR 2206H | <<locked>> | 82% | 56,333 psi | 90% | 2552 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,853 psi | 86% | 2510 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,056 psi | 88% | 2625 fps | 98.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,620 psi | 84% | 2618 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,953 psi | 85% | 2621 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,491 psi | 87% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,042 psi | 88% | 2552 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,650 psi | 88% | 2628 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,970 psi | 90% | 2654 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,128 psi | 87% | 2612 fps | 98.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2615 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,254 psi | 77% | 2552 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,337 psi | 68% | 2493 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 2730 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,275 psi | 90% | 2572 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,905 psi | 75% | 2546 fps | 97.5% |
| Bofors RP3 | <<locked>> | 86% | 55,448 psi | 89% | 2549 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,213 psi | 82% | 2615 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 54,839 psi | 88% | 2536 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 86% | 55,825 psi | 90% | 2566 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,260 psi | 90% | 2631 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 90% | 56,304 psi | 90% | 2595 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 98% | 52,852 psi | 85% | 2569 fps | 96.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,259 psi | 89% | 2602 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,911 psi | 88% | 2559 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,388 psi | 86% | 2546 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,234 psi | 66% | 2513 fps | 96.7% |
| Hodgdon Superformance | <<locked>> | 92% | 56,391 psi | 90% | 2671 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,289 psi | 58% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,230 psi | 87% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,650 psi | 86% | 2497 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,985 psi | 90% | 2526 fps | 99.6% |
| IMR 4350 | <<locked>> | 94% | 55,550 psi | 89% | 2566 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,243 psi | 85% | 2516 fps | 99.4% |
| IMR 4831 | <<locked>> | 94% | 54,201 psi | 87% | 2572 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,434 psi | 90% | 2579 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,636 psi | 88% | 2559 fps | 97.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,009 psi | 80% | 2592 fps | 96.8% |
| Lovex S060 | <<locked>> | 82% | 55,216 psi | 89% | 2480 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,476 psi | 86% | 2487 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,275 psi | 90% | 2556 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 54,288 psi | 87% | 2549 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,946 psi | 69% | 2408 fps | 98.8% |
| Norma 201 | <<locked>> | 82% | 55,100 psi | 88% | 2497 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,782 psi | 89% | 2493 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,331 psi | 87% | 2539 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,289 psi | 90% | 2618 fps | 98.8% |
| Norma MRPᴾ | <<locked>> | 100% | 54,085 psi | 87% | 2690 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 56,405 psi | 90% | 2615 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,708 psi | 88% | 2562 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,922 psi | 80% | 2598 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 94% | 55,027 psi | 88% | 2621 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2493 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,985 psi | 59% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,738 psi | 89% | 2552 fps | 99.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,927 psi | 90% | 2615 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,738 psi | 89% | 2648 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,679 psi | 86% | 2605 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,173 psi | 90% | 2684 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,959 psi | 66% | 2510 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 84% | 55,564 psi | 89% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,347 psi | 89% | 2543 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,272 psi | 85% | 2546 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 98% | 53,417 psi | 86% | 2602 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,839 psi | 88% | 2536 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,275 psi | 90% | 2556 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 53,476 psi | 86% | 2487 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,288 psi | 87% | 2549 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,330 psi | 86% | 2552 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,766 psi | 88% | 2530 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,970 psi | 90% | 2428 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,432 psi | 86% | 2395 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,115 psi | 90% | 2513 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,939 psi | 85% | 2595 fps | 98.6% |
| Somchem S335 | <<locked>> | 82% | 55,651 psi | 89% | 2431 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,434 psi | 89% | 2539 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,824 psi | 88% | 2539 fps | 96.9% |
| Somchem S365 | <<locked>> | 96% | 55,405 psi | 89% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,070 psi | 87% | 2579 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 84% | 55,854 psi | 90% | 2454 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,391 psi | 90% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,142 psi | 85% | 2470 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,824 psi | 88% | 2559 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,777 psi | 80% | 2507 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 84% | 54,404 psi | 87% | 2474 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,911 psi | 86% | 2569 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2621 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2680 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,186 psi | 87% | 2530 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,260 psi | 90% | 2631 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,323 psi | 69% | 2605 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,853 psi | 88% | 2536 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,012 psi | 87% | 2572 fps | 98.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 50,096 psi | 80% | 2388 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,877 psi | 77% | 2398 fps | 98.2% |
| Accurate 3100 | <<locked>> | 84% | 30,153 psi | 48% | 2152 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 47,485 psi | 76% | 2395 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,013 psi | 58% | 2287 fps | 98.7% |
| Accurate High Country | <<locked>> | 92% | 42,525 psi | 68% | 2503 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 98% | 49,792 psi | 80% | 2612 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 52,953 psi | 85% | 2507 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,846 psi | 72% | 2375 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 39,784 psi | 64% | 2365 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 46,137 psi | 74% | 2510 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,226 psi | 79% | 2569 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,324 psi | 73% | 2398 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,457 psi | 78% | 2461 fps | 100% |
| Alliant Reloder-16 | 34.7 gr | 80% | 35,143 psi | 56% | 2293 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,639 psi | 64% | 2405 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,349 psi | 63% | 2362 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,479 psi | 63% | 2408 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,802 psi | 41% | 2083 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,951 psi | 50% | 2238 fps | 95.8% |
| Alliant Reloder-26 | 39.3 gr | 82% | 29,153 psi | 47% | 2231 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,518 psi | 84% | 2523 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 38,957 psi | 62% | 2398 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 45,585 psi | 73% | 2411 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,479 psi | 63% | 2408 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,205 psi | 64% | 2297 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 46,035 psi | 74% | 2421 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 37,855 psi | 61% | 2326 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,046 psi | 66% | 2346 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 94% | 45,992 psi | 74% | 2461 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,385 psi | 78% | 2500 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,750 psi | 53% | 2201 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,096 psi | 80% | 2503 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,682 psi | 62% | 2454 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 36,883 psi | 59% | 2339 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 43% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,242 psi | 82% | 2470 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,181 psi | 76% | 2402 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,400 psi | 79% | 2431 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 35,998 psi | 58% | 2234 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,481 psi | 67% | 2323 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 34,505 psi | 55% | 2244 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 49,719 psi | 80% | 2484 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 45,281 psi | 73% | 2411 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 43,874 psi | 70% | 2484 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 51,895 psi | 83% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,456 psi | 76% | 2402 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,189 psi | 63% | 2283 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 37,434 psi | 60% | 2267 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 31,314 psi | 50% | 2178 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 51,706 psi | 83% | 2451 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,359 psi | 84% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,834 psi | 77% | 2448 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,277 psi | 65% | 2359 fps | 95.4% |
| Norma MRP | <<locked>> | 86% | 33,736 psi | 54% | 2313 fps | 95% |
| Norma URP | <<locked>> | 80% | 35,868 psi | 58% | 2283 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,848 psi | 77% | 2467 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,569 psi | 70% | 2487 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 34,606 psi | 55% | 2270 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 96% | 38,638 psi | 62% | 2382 fps | 95.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 45% | 1417 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,934 psi | 74% | 2405 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,011 psi | 83% | 2562 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,134 psi | 68% | 2451 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,621 psi | 57% | 2303 fps | 98.3% |
| ReloadSwiss RS 70 | 38 gr | 80% | 34,722 psi | 56% | 2310 fps | 97.7% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,781 psi | 57% | 2388 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 49,313 psi | 79% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,902 psi | 69% | 2362 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,222 psi | 71% | 2402 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 38,305 psi | 61% | 2346 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,205 psi | 64% | 2297 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,189 psi | 63% | 2283 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 47,456 psi | 76% | 2402 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,434 psi | 60% | 2267 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,729 psi | 70% | 2408 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,111 psi | 82% | 2477 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,475 psi | 84% | 2385 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,266 psi | 71% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,421 psi | 62% | 2234 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 37,942 psi | 61% | 2339 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 52,315 psi | 84% | 2388 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,250 psi | 69% | 2362 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,095 psi | 77% | 2441 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 32,358 psi | 52% | 2247 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 36,680 psi | 59% | 2287 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 49,342 psi | 79% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,676 psi | 80% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,307 psi | 66% | 2300 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,304 psi | 60% | 2280 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 92% | 38,276 psi | 61% | 2313 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,037 psi | 77% | 2392 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,825 psi | 59% | 2287 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,210 psi | 45% | 2152 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 94% | 44,628 psi | 72% | 2516 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,376 psi | 58% | 2254 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 37,855 psi | 61% | 2326 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 22,684 psi | 36% | 2051 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,155 psi | 82% | 2487 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 38,551 psi | 62% | 2320 fps | 95% |
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 100 powders for .260 Ackley Improved loaded with the .264 | 156gr | RWS Evolution. Alliant Reloder-26 delivers the highest muzzle velocity at 2,730 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,730 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.264" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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 70, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .260 Ackley Improved with the .264 | 156gr | RWS Evolution 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.