Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:200 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.30-06 R Stief load data
Case Length (l3):2.49"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:69 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:58,740 psi
Recommended Twist Rate:1:12.5
Load data in caliber .30-06 R Stief with .308 | 200gr | Nosler Partition bullet and 96 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.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 52,663 psi | 90% | 2395 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 51,329 psi | 87% | 2421 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,895 psi | 90% | 2480 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,299 psi | 86% | 2421 fps | 97% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,626 psi | 71% | 2385 fps | 97% |
| Accurate 4064 | <<locked>> | 88% | 51,561 psi | 88% | 2467 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 50,705 psi | 86% | 2539 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 84% | 51,648 psi | 88% | 2490 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 52,591 psi | 90% | 2490 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,516 psi | 84% | 2520 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 50,691 psi | 86% | 2444 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 51,590 psi | 88% | 2421 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 50,865 psi | 87% | 2595 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 52,837 psi | 90% | 2513 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,980 psi | 85% | 2487 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 52,156 psi | 89% | 2592 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,098 psi | 90% | 2621 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,443 psi | 82% | 2510 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,769 psi | 68% | 2411 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,266 psi | 75% | 2556 fps | 98.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 51,314 psi | 87% | 2507 fps | 99.7% |
| Bofors RP3 | <<locked>> | 90% | 53,156 psi | 90% | 2526 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 50,024 psi | 85% | 2454 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 52,576 psi | 90% | 2431 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 49,777 psi | 85% | 2470 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 50,618 psi | 86% | 2490 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 94% | 50,328 psi | 86% | 2539 fps | 98% |
| Hodgdon H4350 | <<locked>> | 92% | 51,024 psi | 87% | 2503 fps | 96.8% |
| Hodgdon H4895 | <<locked>> | 84% | 52,214 psi | 89% | 2500 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,735 psi | 88% | 2523 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 51,517 psi | 88% | 2530 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 50,473 psi | 86% | 2569 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 61% | 1522 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 50,198 psi | 85% | 2457 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 52,301 psi | 89% | 2480 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 52,272 psi | 89% | 2477 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 52,228 psi | 89% | 2461 fps | 98.1% |
| IMR 4350 | <<locked>> | 96% | 50,154 psi | 85% | 2477 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 52,040 psi | 89% | 2487 fps | 98% |
| IMR 4831 | <<locked>> | 98% | 51,213 psi | 87% | 2533 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 51,256 psi | 87% | 2513 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 50,691 psi | 86% | 2444 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 51,300 psi | 87% | 2467 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 51,445 psi | 88% | 2428 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 52,141 psi | 89% | 2474 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 51,256 psi | 87% | 2477 fps | 99% |
| Lovex S070 | <<locked>> | 96% | 51,938 psi | 88% | 2507 fps | 98.3% |
| Norma 201 | <<locked>> | 84% | 50,517 psi | 86% | 2441 fps | 100% |
| Norma 202 | <<locked>> | 84% | 51,111 psi | 87% | 2444 fps | 100% |
| Norma 203B | <<locked>> | 88% | 52,475 psi | 89% | 2520 fps | 100% |
| Norma 204 | <<locked>> | 96% | 50,444 psi | 86% | 2520 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 44,309 psi | 75% | 2516 fps | 96.5% |
| Norma URP | <<locked>> | 96% | 49,908 psi | 85% | 2530 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 88% | 52,794 psi | 90% | 2543 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 52,098 psi | 89% | 2575 fps | 98.9% |
| Ramshot TAC | <<locked>> | 82% | 50,749 psi | 86% | 2461 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 82% | 50,473 psi | 86% | 2480 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,216 psi | 62% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 50,966 psi | 87% | 2474 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 50,009 psi | 85% | 2539 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 53,011 psi | 90% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 50,328 psi | 86% | 2559 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 49,995 psi | 85% | 2582 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 82% | 51,677 psi | 88% | 2425 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 51,082 psi | 87% | 2441 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,040 psi | 90% | 2520 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 50,024 psi | 85% | 2454 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 51,256 psi | 87% | 2477 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 84% | 51,300 psi | 87% | 2467 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 52,141 psi | 89% | 2474 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 51,938 psi | 88% | 2507 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 51,372 psi | 87% | 2530 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,518 psi | 89% | 2490 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 50,125 psi | 85% | 2467 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,199 psi | 89% | 2388 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 52,141 psi | 89% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,198 psi | 87% | 2434 fps | 97.9% |
| Somchem S335 | <<locked>> | 84% | 51,401 psi | 88% | 2385 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,301 psi | 89% | 2484 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 50,241 psi | 86% | 2474 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,343 psi | 87% | 2579 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,790 psi | 81% | 2477 fps | 96.8% |
| Vihtavuori N133 | <<locked>> | 84% | 52,518 psi | 89% | 2375 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 50,995 psi | 87% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 51,547 psi | 88% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 51,372 psi | 87% | 2454 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 52,402 psi | 89% | 2526 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 82% | 51,010 psi | 87% | 2444 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 52,910 psi | 90% | 2464 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 51,343 psi | 87% | 2533 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,569 psi | 74% | 2477 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 52,605 psi | 90% | 2510 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 50,894 psi | 87% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 50,328 psi | 86% | 2539 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,462 psi | 60% | 2421 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,127 psi | 90% | 2516 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 49,617 psi | 84% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,250 psi | 72% | 2297 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,269 psi | 84% | 2431 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,324 psi | 75% | 2326 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 36,245 psi | 62% | 2287 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 39,958 psi | 68% | 2297 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,314 psi | 53% | 2195 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 45,745 psi | 78% | 2402 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,856 psi | 66% | 2267 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 46,412 psi | 79% | 2467 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,834 psi | 81% | 2405 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,124 psi | 82% | 2379 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,582 psi | 71% | 2434 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,667 psi | 66% | 2293 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,452 psi | 71% | 2349 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,937 psi | 54% | 2208 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,286 psi | 57% | 2270 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 45,484 psi | 77% | 2461 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,673 psi | 47% | 2129 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,663 psi | 57% | 2333 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,976 psi | 77% | 2408 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 38,145 psi | 65% | 2293 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 41,539 psi | 71% | 2313 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,400 psi | 84% | 2388 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,659 psi | 79% | 2425 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,030 psi | 66% | 2297 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 38,508 psi | 66% | 2336 fps | 95% |
| Hodgdon H4350 | <<locked>> | 88% | 44,918 psi | 76% | 2405 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 46,209 psi | 79% | 2408 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,412 psi | 47% | 2070 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,134 psi | 72% | 2388 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 40,872 psi | 70% | 2402 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,614 psi | 45% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,150 psi | 75% | 2365 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 45,919 psi | 78% | 2395 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,799 psi | 69% | 2297 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,279 psi | 74% | 2316 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 41,713 psi | 71% | 2339 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,756 psi | 69% | 2300 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 30,632 psi | 52% | 2162 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,482 psi | 72% | 2372 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 47,834 psi | 81% | 2405 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,976 psi | 77% | 2379 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,614 psi | 78% | 2339 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 40,785 psi | 69% | 2300 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,679 psi | 61% | 2208 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 38,247 psi | 65% | 2277 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 44,701 psi | 76% | 2356 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,179 psi | 77% | 2359 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,843 psi | 70% | 2336 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 47,268 psi | 80% | 2467 fps | 95.3% |
| Norma MRP | <<locked>> | 98% | 41,495 psi | 71% | 2464 fps | 95.6% |
| Norma URP | <<locked>> | 82% | 31,937 psi | 54% | 2201 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,321 psi | 69% | 2349 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 37,652 psi | 64% | 2329 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 47,427 psi | 81% | 2411 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,108 psi | 80% | 2428 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 46% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,378 psi | 67% | 2280 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,700 psi | 74% | 2441 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,433 psi | 60% | 2326 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,227 psi | 53% | 2211 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,665 psi | 61% | 2313 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 48,791 psi | 83% | 2385 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,598 psi | 73% | 2313 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,013 psi | 61% | 2244 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 41,539 psi | 71% | 2313 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,679 psi | 61% | 2208 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,976 psi | 77% | 2379 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,785 psi | 69% | 2300 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 38,247 psi | 65% | 2277 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,956 psi | 63% | 2293 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,905 psi | 78% | 2392 fps | 98.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,179 psi | 75% | 2375 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,006 psi | 78% | 2303 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,377 psi | 65% | 2192 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,639 psi | 67% | 2247 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 45,585 psi | 78% | 2306 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,774 psi | 78% | 2388 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 36,767 psi | 63% | 2247 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 26,701 psi | 45% | 2106 fps | 97% |
| Somchem S385 | <<locked>> | 96% | 41,916 psi | 71% | 2382 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 46,354 psi | 79% | 2297 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,163 psi | 72% | 2290 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,714 psi | 73% | 2300 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,998 psi | 60% | 2192 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 31,227 psi | 53% | 2152 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 47,761 psi | 81% | 2398 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,104 psi | 70% | 2293 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,677 psi | 56% | 2201 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 29,617 psi | 50% | 2195 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,009 psi | 53% | 2133 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 47,674 psi | 81% | 2441 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 38,754 psi | 66% | 2343 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,630 psi | 47% | 2198 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,613 psi | 74% | 2375 fps | 99.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 96 powders for .30-06 R Stief loaded with the .308 | 200gr | Nosler Partition. Alliant Reloder-17 delivers the highest muzzle velocity at 2,621 fps; across all powders the maximum-charge window runs from 1,522 fps to 2,621 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.