Load Specifications
Load data in caliber .260 Rem. with .264 | 160gr | Woodleigh PP SN bullet and 97 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% | 51,895 psi | 86% | 2362 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,417 psi | 89% | 2428 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 49,574 psi | 82% | 2464 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 52,127 psi | 87% | 2411 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,098 psi | 87% | 2507 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 51,387 psi | 85% | 2585 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 52,692 psi | 88% | 2444 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,185 psi | 88% | 2546 fps | 98.4% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 50,676 psi | 84% | 2533 fps | 96.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 51,111 psi | 85% | 2546 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 52,968 psi | 88% | 2539 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,258 psi | 88% | 2464 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,359 psi | 89% | 2480 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,069 psi | 88% | 2556 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,012 psi | 90% | 2579 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,214 psi | 87% | 2533 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,139 psi | 82% | 2533 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,673 psi | 78% | 2484 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,901 psi | 68% | 2418 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,055 psi | 88% | 2651 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,252 psi | 75% | 2467 fps | 97% |
| Bofors RP3 | <<locked>> | 86% | 53,519 psi | 89% | 2474 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,139 psi | 82% | 2533 fps | 98% |
| Bofors RP7 | <<locked>> | 90% | 53,214 psi | 88% | 2461 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 54,056 psi | 90% | 2490 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 54,404 psi | 90% | 2552 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 88% | 51,256 psi | 85% | 2467 fps | 98.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 54,404 psi | 90% | 2539 fps | 96.8% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 53,200 psi | 88% | 2520 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,316 psi | 89% | 2487 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 51,822 psi | 86% | 2477 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 39,871 psi | 66% | 2434 fps | 96% |
| Hodgdon Superformance | <<locked>> | 92% | 54,230 psi | 90% | 2589 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 60% | 1506 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 52,852 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 52,330 psi | 87% | 2428 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 51,488 psi | 86% | 2411 fps | 99.2% |
| IMR 4350 | <<locked>> | 94% | 53,853 psi | 89% | 2490 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 51,967 psi | 86% | 2444 fps | 99.2% |
| IMR 4831 | <<locked>> | 94% | 52,707 psi | 88% | 2500 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 51,605 psi | 86% | 2461 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 52,910 psi | 88% | 2480 fps | 96.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 48,443 psi | 80% | 2513 fps | 96.3% |
| Lovex S060 | <<locked>> | 82% | 53,853 psi | 89% | 2411 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,127 psi | 87% | 2418 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 51,590 psi | 86% | 2438 fps | 99.8% |
| Lovex S070 | <<locked>> | 92% | 52,750 psi | 88% | 2477 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,278 psi | 69% | 2336 fps | 98.4% |
| Norma 201 | <<locked>> | 82% | 53,635 psi | 89% | 2428 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,317 psi | 90% | 2425 fps | 100% |
| Norma 203B | <<locked>> | 84% | 52,649 psi | 87% | 2467 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,302 psi | 90% | 2539 fps | 98.4% |
| Norma MRPᴾ | <<locked>> | 100% | 52,025 psi | 86% | 2608 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 54,462 psi | 90% | 2539 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,026 psi | 88% | 2490 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 48,472 psi | 81% | 2523 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 94% | 53,011 psi | 88% | 2543 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,757 psi | 71% | 2408 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 62% | 1542 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,143 psi | 90% | 2477 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,172 psi | 90% | 2539 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 53,621 psi | 89% | 2569 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 51,938 psi | 86% | 2530 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 53,925 psi | 90% | 2602 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 39,421 psi | 65% | 2425 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 54,186 psi | 90% | 2428 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,795 psi | 89% | 2470 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 51,634 psi | 86% | 2470 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 51,387 psi | 85% | 2520 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 53,214 psi | 88% | 2461 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 51,590 psi | 86% | 2438 fps | 99.8% |
| Shooters World Precision | <<locked>> | 84% | 52,127 psi | 87% | 2418 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 52,750 psi | 88% | 2477 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 51,634 psi | 86% | 2477 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,258 psi | 88% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,127 psi | 87% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 51,169 psi | 85% | 2395 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 50,908 psi | 85% | 2513 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 54,259 psi | 90% | 2362 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,925 psi | 90% | 2467 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 53,011 psi | 88% | 2464 fps | 96.5% |
| Somchem S365 | <<locked>> | 96% | 53,432 psi | 89% | 2543 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,199 psi | 87% | 2500 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 51,387 psi | 85% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 51,590 psi | 86% | 2365 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 51,779 psi | 86% | 2405 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,258 psi | 88% | 2487 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,037 psi | 80% | 2431 fps | 98% |
| Vihtavuori N540 | <<locked>> | 84% | 52,982 psi | 88% | 2408 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 52,170 psi | 87% | 2493 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,257 psi | 87% | 2549 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 52,620 psi | 87% | 2598 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 52,866 psi | 88% | 2464 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 51,256 psi | 85% | 2510 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,974 psi | 70% | 2530 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,011 psi | 88% | 2461 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,330 psi | 87% | 2497 fps | 98.2% |
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% | 48,776 psi | 81% | 2323 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,818 psi | 78% | 2329 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 31,082 psi | 52% | 2133 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 46,209 psi | 77% | 2333 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,693 psi | 58% | 2218 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 98% | 47,935 psi | 80% | 2533 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 43,772 psi | 73% | 2310 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 41,089 psi | 68% | 2343 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 96% | 44,512 psi | 74% | 2431 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,703 psi | 79% | 2493 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 38,696 psi | 64% | 2300 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,208 psi | 73% | 2333 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,065 psi | 78% | 2388 fps | 100% |
| Alliant Reloder-16 | 33 gr | 80% | 34,229 psi | 57% | 2228 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,522 psi | 64% | 2336 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 40,596 psi | 67% | 2339 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,029 psi | 63% | 2333 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,063 psi | 42% | 2021 fps | 96.3% |
| Alliant Reloder-25 | <<locked>> | 90% | 29,907 psi | 50% | 2165 fps | 95.1% |
| Alliant Reloder-26 | 37.4 gr | 82% | 28,210 psi | 47% | 2162 fps | 95.4% |
| Bofors RP15 | <<locked>> | 96% | 39,827 psi | 66% | 2369 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,237 psi | 73% | 2343 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,029 psi | 63% | 2333 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 39,247 psi | 65% | 2231 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 44,483 psi | 74% | 2349 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 36,738 psi | 61% | 2257 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 39,856 psi | 66% | 2277 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 47,747 psi | 79% | 2438 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 46,673 psi | 78% | 2421 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,763 psi | 53% | 2136 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,443 psi | 80% | 2428 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 37,594 psi | 62% | 2382 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 35,650 psi | 59% | 2264 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 45% | 1342 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,806 psi | 83% | 2398 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,050 psi | 77% | 2336 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,211 psi | 80% | 2359 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 34,882 psi | 58% | 2169 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,582 psi | 67% | 2257 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 33,547 psi | 56% | 2178 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 48,240 psi | 80% | 2411 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 46,731 psi | 78% | 2388 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 45,237 psi | 75% | 2457 fps | 95.4% |
| Lovex S060 | <<locked>> | 80% | 50,821 psi | 84% | 2369 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,282 psi | 77% | 2336 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,218 psi | 63% | 2218 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 36,230 psi | 60% | 2198 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 30,110 psi | 50% | 2113 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,575 psi | 84% | 2385 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,169 psi | 85% | 2385 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,456 psi | 77% | 2379 fps | 100% |
| Norma 204 | <<locked>> | 84% | 39,146 psi | 65% | 2290 fps | 95% |
| Norma MRP | <<locked>> | 88% | 34,795 psi | 58% | 2293 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 34,621 psi | 58% | 2211 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,354 psi | 77% | 2398 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 45,136 psi | 75% | 2467 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 33,605 psi | 56% | 2201 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 37,115 psi | 62% | 2300 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 46% | 1371 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,817 psi | 74% | 2339 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,517 psi | 84% | 2490 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,988 psi | 68% | 2382 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,214 psi | 57% | 2231 fps | 97.9% |
| ReloadSwiss RS 70 | 36.1 gr | 80% | 33,634 psi | 56% | 2238 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 36,883 psi | 61% | 2365 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,124 psi | 80% | 2346 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,466 psi | 69% | 2293 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 45,411 psi | 75% | 2372 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 90% | 39,784 psi | 66% | 2329 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,247 psi | 65% | 2231 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,218 psi | 63% | 2218 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 46,282 psi | 77% | 2336 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,230 psi | 60% | 2198 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,525 psi | 71% | 2343 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,893 psi | 83% | 2411 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,424 psi | 72% | 2215 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,347 psi | 62% | 2169 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 39,407 psi | 65% | 2323 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 51,213 psi | 85% | 2326 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,192 psi | 70% | 2297 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 46,514 psi | 77% | 2365 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,198 psi | 52% | 2178 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 35,302 psi | 59% | 2215 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 48,298 psi | 80% | 2313 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,225 psi | 80% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,972 psi | 66% | 2231 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,085 psi | 60% | 2211 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 37,101 psi | 62% | 2244 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 46,470 psi | 77% | 2320 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,447 psi | 59% | 2215 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 27,050 psi | 45% | 2083 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 46,340 psi | 77% | 2497 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,331 psi | 59% | 2192 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 36,738 psi | 61% | 2257 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,467 psi | 39% | 2044 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,951 psi | 83% | 2418 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 39,784 psi | 66% | 2297 fps | 95.3% |
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 97 powders for .260 Rem. loaded with the .264 | 160gr | Woodleigh PP SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,651 fps; across all powders the maximum-charge window runs from 1,506 fps to 2,651 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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 Rem. with the .264 | 160gr | Woodleigh PP SN 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.