Load Specifications
Load data in caliber 8 x 68 S with .323 | 250gr | Woodleigh RN 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 Alliant Reloder-26, Ramshot Grand and Norma MRP.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 57,000 psi | 89% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,564 psi | 87% | 2444 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,927 psi | 88% | 2533 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 57,377 psi | 90% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,636 psi | 86% | 2523 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,766 psi | 86% | 2625 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 86% | 57,174 psi | 90% | 2487 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,405 psi | 87% | 2572 fps | 99.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,449 psi | 88% | 2621 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 41,307 psi | 65% | 2369 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,419 psi | 57% | 2336 fps | 97.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,797 psi | 89% | 2602 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,592 psi | 86% | 2464 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,824 psi | 86% | 2484 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,259 psi | 87% | 2569 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,492 psi | 89% | 2585 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,621 psi | 86% | 2559 fps | 99.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2618 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 2543 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,556 psi | 71% | 2497 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,434 psi | 88% | 2677 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2536 fps | 96% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,068 psi | 80% | 2552 fps | 99.2% |
| Bofors RP3 | <<locked>> | 84% | 55,593 psi | 87% | 2480 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 41,553 psi | 65% | 2434 fps | 96.9% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,448 psi | 87% | 2618 fps | 99.6% |
| Bofors RP7 | <<locked>> | 88% | 54,650 psi | 86% | 2474 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,395 psi | 66% | 2395 fps | 97% |
| Hodgdon H380 | <<locked>> | 84% | 55,811 psi | 87% | 2500 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,085 psi | 85% | 2536 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 90% | 54,810 psi | 86% | 2513 fps | 99.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2507 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,593 psi | 87% | 2552 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,593 psi | 87% | 2497 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,450 psi | 90% | 2526 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,802 psi | 70% | 2543 fps | 99% |
| Hodgdon Superformance | <<locked>> | 90% | 56,652 psi | 89% | 2608 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,651 psi | 57% | 1509 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,753 psi | 89% | 2474 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,362 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,188 psi | 88% | 2464 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,042 psi | 86% | 2454 fps | 99.9% |
| IMR 4350 | <<locked>> | 92% | 55,724 psi | 87% | 2510 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,217 psi | 88% | 2497 fps | 99.9% |
| IMR 4831 | <<locked>> | 96% | 55,927 psi | 88% | 2526 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 56,231 psi | 88% | 2507 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,824 psi | 86% | 2507 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 98% | 54,230 psi | 85% | 2602 fps | 98.8% |
| Lovex S062 | <<locked>> | 84% | 56,898 psi | 89% | 2461 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,579 psi | 89% | 2493 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 54,360 psi | 85% | 2490 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,514 psi | 73% | 2408 fps | 99.8% |
| Norma 203B | <<locked>> | 82% | 54,143 psi | 85% | 2470 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,376 psi | 88% | 2559 fps | 99.5% |
| Norma MRP | <<locked>> | 98% | 55,158 psi | 86% | 2641 fps | 100% |
| Norma URP | <<locked>> | 92% | 56,884 psi | 89% | 2552 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,781 psi | 86% | 2497 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,969 psi | 85% | 2608 fps | 99% |
| Ramshot Hunter | <<locked>> | 92% | 55,361 psi | 87% | 2559 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2589 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,289 psi | 58% | 1545 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,550 psi | 87% | 2487 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,999 psi | 88% | 2575 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,360 psi | 85% | 2546 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 56,246 psi | 88% | 2618 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,512 psi | 70% | 2536 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 82% | 55,434 psi | 87% | 2425 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,724 psi | 87% | 2477 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,956 psi | 89% | 2539 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 57,421 psi | 90% | 2592 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 88% | 54,650 psi | 86% | 2474 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,579 psi | 89% | 2493 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 56,898 psi | 89% | 2461 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,360 psi | 85% | 2490 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,159 psi | 90% | 2533 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,536 psi | 89% | 2362 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,043 psi | 88% | 2454 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,927 psi | 89% | 2589 fps | 99.7% |
| Somchem S355 | <<locked>> | 86% | 55,434 psi | 87% | 2470 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 55,013 psi | 86% | 2490 fps | 98.1% |
| Somchem S365 | <<locked>> | 94% | 56,173 psi | 88% | 2549 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,549 psi | 85% | 2526 fps | 99.8% |
| Unknown powder | <<locked>> | 90% | 57,406 psi | 90% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 55,941 psi | 88% | 2382 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 56,014 psi | 88% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,768 psi | 89% | 2448 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,361 psi | 87% | 2500 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,809 psi | 84% | 2503 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 84% | 57,682 psi | 90% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,346 psi | 85% | 2507 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 55,332 psi | 87% | 2566 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 55,376 psi | 87% | 2635 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,268 psi | 74% | 2507 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,636 psi | 86% | 2470 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,085 psi | 85% | 2536 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,776 psi | 75% | 2612 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,289 psi | 88% | 2543 fps | 99.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 53,519 psi | 84% | 2359 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,803 psi | 72% | 2306 fps | 98.8% |
| Accurate 3100 | <<locked>> | 80% | 28,718 psi | 45% | 2067 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,778 psi | 80% | 2372 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,015 psi | 61% | 2287 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 94% | 44,396 psi | 70% | 2461 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 47,688 psi | 75% | 2359 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 35,215 psi | 55% | 2224 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 40,596 psi | 64% | 2362 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 98% | 38,595 psi | 60% | 2316 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 32,184 psi | 50% | 2234 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,026 psi | 83% | 2556 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,327 psi | 76% | 2379 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,576 psi | 81% | 2441 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,884 psi | 59% | 2297 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,873 psi | 67% | 2398 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,041 psi | 55% | 2221 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,056 psi | 55% | 2267 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,804 psi | 44% | 2096 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 27,789 psi | 44% | 2110 fps | 95.9% |
| Alliant Reloder-26 | 57.7 gr | 80% | 29,602 psi | 46% | 2201 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 52,257 psi | 82% | 2487 fps | 95.3% |
| Bofors RP15 | <<locked>> | 88% | 34,780 psi | 55% | 2260 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 48,863 psi | 77% | 2392 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 36,477 psi | 57% | 2333 fps | 95.3% |
| Bofors RP5 | <<locked>> | 86% | 35,056 psi | 55% | 2267 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 42,830 psi | 67% | 2293 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 96% | 37,217 psi | 58% | 2290 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 48,907 psi | 77% | 2405 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,324 psi | 69% | 2392 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 40,234 psi | 63% | 2280 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 92% | 40,567 psi | 64% | 2316 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 42,554 psi | 67% | 2352 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,375 psi | 55% | 2198 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,386 psi | 79% | 2438 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 34,795 psi | 55% | 2326 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 39,566 psi | 62% | 2343 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 43% | 1348 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,227 psi | 79% | 2388 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,156 psi | 83% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,934 psi | 74% | 2336 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,948 psi | 72% | 2320 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 38,450 psi | 60% | 2234 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,106 psi | 69% | 2316 fps | 99% |
| IMR 4831 | <<locked>> | 80% | 33,997 psi | 53% | 2178 fps | 99.1% |
| IMR 4895 | <<locked>> | 80% | 52,924 psi | 83% | 2464 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 40,219 psi | 63% | 2274 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 38,812 psi | 61% | 2339 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 50,430 psi | 79% | 2379 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,727 psi | 65% | 2274 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 40,001 psi | 63% | 2264 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 28,166 psi | 44% | 2054 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,937 psi | 80% | 2428 fps | 100% |
| Norma 204 | <<locked>> | 80% | 37,739 psi | 59% | 2260 fps | 96.1% |
| Norma MRP | 56 gr | 80% | 29,921 psi | 47% | 2172 fps | 95% |
| Norma URP | <<locked>> | 80% | 38,696 psi | 61% | 2280 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 80% | 51,329 psi | 80% | 2451 fps | 100% |
| Ramshot Grand | 62.1 gr | 86% | 37,652 psi | 59% | 2329 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,362 psi | 59% | 2274 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 86% | 32,503 psi | 51% | 2205 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 44% | 1378 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,834 psi | 77% | 2395 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,513 psi | 71% | 2438 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,566 psi | 60% | 2303 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,391 psi | 59% | 2316 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 31,676 psi | 50% | 2251 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 52,156 psi | 82% | 2385 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,963 psi | 72% | 2346 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 39,131 psi | 61% | 2257 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 34,142 psi | 54% | 2208 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 42,830 psi | 67% | 2293 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,727 psi | 65% | 2274 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 50,430 psi | 79% | 2379 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,001 psi | 63% | 2264 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,934 psi | 74% | 2395 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,137 psi | 74% | 2251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,814 psi | 64% | 2228 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 33,808 psi | 53% | 2201 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 46,137 psi | 72% | 2343 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 42,424 psi | 66% | 2297 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 35,215 psi | 55% | 2244 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 32,605 psi | 51% | 2149 fps | 95.7% |
| Unknown powder | <<locked>> | 80% | 41,626 psi | 65% | 2326 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,779 psi | 83% | 2346 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,721 psi | 83% | 2362 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,092 psi | 69% | 2280 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,103 psi | 63% | 2277 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 32,082 psi | 50% | 2136 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 50,763 psi | 80% | 2362 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,349 psi | 62% | 2280 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,806 psi | 48% | 2159 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 39,653 psi | 62% | 2372 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 38,711 psi | 61% | 2356 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,059 psi | 61% | 2247 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,324 psi | 69% | 2392 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,511 psi | 38% | 2093 fps | 98.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 34,476 psi | 54% | 2188 fps | 95.1% |
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 102 powders for 8 x 68 S loaded with the .323 | 250gr | Woodleigh RN SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,509 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.323" calls for a 1:14.5 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. Alliant Reloder-26, Ramshot Grand, Norma MRP rank at the top here: for 8 x 68 S with the .323 | 250gr | Woodleigh RN SN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 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.