Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:175 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:1:12.0
Load data in caliber .30-06 R Stief with .308 | 175gr | Berger LRBT Target bullet and 94 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>> | 84% | 51,909 psi | 88% | 2566 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,069 psi | 90% | 2628 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,619 psi | 88% | 2641 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,808 psi | 90% | 2615 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 53,055 psi | 90% | 2671 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,228 psi | 89% | 2733 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 50,836 psi | 87% | 2651 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 92% | 51,750 psi | 88% | 2648 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 84% | 50,067 psi | 85% | 2608 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 84% | 50,256 psi | 86% | 2592 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 49,719 psi | 85% | 2746 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 51,445 psi | 88% | 2671 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,054 psi | 89% | 2690 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,850 psi | 87% | 2740 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 51,663 psi | 88% | 2776 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,056 psi | 61% | 2480 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,798 psi | 68% | 2615 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 50,270 psi | 86% | 2661 fps | 99% |
| Bofors RP3 | <<locked>> | 92% | 51,561 psi | 88% | 2680 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,228 psi | 89% | 2648 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 51,996 psi | 89% | 2595 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,257 psi | 89% | 2680 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 50,125 psi | 85% | 2713 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 92% | 52,895 psi | 90% | 2694 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 51,851 psi | 88% | 2730 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 86% | 51,285 psi | 87% | 2661 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,862 psi | 80% | 2625 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 49,937 psi | 85% | 2684 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 98% | 52,953 psi | 90% | 2762 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,157 psi | 60% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,388 psi | 89% | 2661 fps | 99.9% |
| IMR 3031 | <<locked>> | 86% | 50,894 psi | 87% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 51,155 psi | 87% | 2631 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,634 psi | 88% | 2612 fps | 96.7% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,185 psi | 89% | 2667 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,068 psi | 87% | 2631 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,385 psi | 84% | 2674 fps | 98.9% |
| IMR 4895 | <<locked>> | 88% | 50,111 psi | 85% | 2667 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 84% | 50,067 psi | 85% | 2608 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 86% | 49,937 psi | 85% | 2628 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 50,821 psi | 87% | 2585 fps | 99.6% |
| Lovex S062 | <<locked>> | 90% | 50,879 psi | 87% | 2631 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 49,995 psi | 85% | 2621 fps | 97.7% |
| Lovex S070 | <<locked>> | 98% | 50,705 psi | 86% | 2651 fps | 96.8% |
| Norma 201 | <<locked>> | 88% | 52,750 psi | 90% | 2648 fps | 100% |
| Norma 202 | <<locked>> | 86% | 50,038 psi | 85% | 2608 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,256 psi | 87% | 2677 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 51,561 psi | 88% | 2723 fps | 99% |
| Ramshot Big Game | <<locked>> | 90% | 51,329 psi | 87% | 2697 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,560 psi | 86% | 2717 fps | 97.5% |
| Ramshot TAC | <<locked>> | 84% | 50,111 psi | 85% | 2615 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,794 psi | 90% | 2687 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 50,734 psi | 86% | 2605 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,679 psi | 61% | 1673 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,852 psi | 90% | 2638 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 50,024 psi | 85% | 2621 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,127 psi | 89% | 2749 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,416 psi | 88% | 2779 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,634 psi | 88% | 2753 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,243 psi | 89% | 2779 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 84% | 50,966 psi | 87% | 2592 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 50,024 psi | 85% | 2598 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 94% | 51,430 psi | 88% | 2671 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 52,228 psi | 89% | 2648 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 49,995 psi | 85% | 2621 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 49,937 psi | 85% | 2628 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 50,879 psi | 87% | 2631 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 50,705 psi | 86% | 2651 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 49,705 psi | 85% | 2677 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 51,605 psi | 88% | 2641 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 52,533 psi | 89% | 2671 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 51,372 psi | 87% | 2552 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 51,169 psi | 87% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,270 psi | 86% | 2579 fps | 96.4% |
| Somchem S321 | <<locked>> | 82% | 50,807 psi | 86% | 2635 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 50,575 psi | 86% | 2549 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,329 psi | 87% | 2641 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 52,156 psi | 89% | 2674 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,021 psi | 78% | 2677 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 51,213 psi | 87% | 2520 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 51,532 psi | 88% | 2539 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,765 psi | 90% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 50,357 psi | 86% | 2585 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 50,053 psi | 85% | 2608 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 50,836 psi | 87% | 2674 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 84% | 50,343 psi | 86% | 2605 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,054 psi | 89% | 2631 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 49,937 psi | 85% | 2677 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,740 psi | 66% | 2552 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,401 psi | 88% | 2657 fps | 99.9% |
| Winchester 748 | <<locked>> | 84% | 49,632 psi | 84% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,185 psi | 89% | 2733 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,169 psi | 55% | 2454 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,083 psi | 89% | 2677 fps | 99.9% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,600 psi | 78% | 2477 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,305 psi | 65% | 2405 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,136 psi | 77% | 2546 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,617 psi | 84% | 2566 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,230 psi | 62% | 2395 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,505 psi | 59% | 2418 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,105 psi | 72% | 2500 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,853 psi | 61% | 2359 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,179 psi | 75% | 2513 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,816 psi | 75% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,913 psi | 65% | 2513 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,085 psi | 60% | 2375 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,927 psi | 65% | 2438 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,114 psi | 60% | 2428 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,298 psi | 52% | 2333 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,894 psi | 54% | 2379 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,289 psi | 63% | 2559 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,017 psi | 70% | 2497 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,548 psi | 59% | 2379 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,037 psi | 83% | 2595 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,977 psi | 78% | 2503 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,482 psi | 72% | 2526 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,702 psi | 80% | 2657 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 82% | 37,913 psi | 65% | 2431 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 94% | 45,382 psi | 77% | 2621 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 42,496 psi | 72% | 2513 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,124 psi | 51% | 2280 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,189 psi | 65% | 2477 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 49,342 psi | 84% | 2703 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,194 psi | 45% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,698 psi | 69% | 2464 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,843 psi | 71% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,594 psi | 64% | 2388 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,426 psi | 77% | 2507 fps | 95.2% |
| IMR 4350 | <<locked>> | 98% | 49,008 psi | 83% | 2618 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,208 psi | 77% | 2533 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,810 psi | 61% | 2428 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,841 psi | 66% | 2467 fps | 97.9% |
| IMR 8208 XBR | <<locked>> | 80% | 44,179 psi | 75% | 2513 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 40,857 psi | 70% | 2480 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,438 psi | 72% | 2444 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,449 psi | 64% | 2398 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,189 psi | 67% | 2428 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 44,730 psi | 76% | 2552 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,191 psi | 70% | 2457 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,278 psi | 70% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,318 psi | 64% | 2428 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 34,911 psi | 59% | 2418 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,550 psi | 62% | 2431 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 41,713 psi | 71% | 2559 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 43,918 psi | 75% | 2510 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,323 psi | 74% | 2533 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,514 psi | 81% | 2552 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,513 psi | 45% | 1496 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,356 psi | 84% | 2589 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,976 psi | 75% | 2520 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,320 psi | 67% | 2526 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,271 psi | 55% | 2398 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,840 psi | 63% | 2487 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,827 psi | 68% | 2546 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,237 psi | 77% | 2503 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,262 psi | 67% | 2411 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,634 psi | 56% | 2326 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,037 psi | 83% | 2595 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,189 psi | 67% | 2428 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,857 psi | 70% | 2480 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,449 psi | 64% | 2398 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 44,730 psi | 76% | 2552 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,576 psi | 57% | 2369 fps | 96% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,177 psi | 72% | 2484 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,553 psi | 69% | 2470 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,786 psi | 73% | 2421 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,433 psi | 60% | 2293 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,050 psi | 80% | 2526 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 47,471 psi | 81% | 2585 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,264 psi | 72% | 2421 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,756 psi | 71% | 2484 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,547 psi | 57% | 2333 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 27,514 psi | 47% | 2264 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,370 psi | 82% | 2480 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,033 psi | 73% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,537 psi | 66% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,204 psi | 67% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,894 psi | 54% | 2277 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,695 psi | 62% | 2421 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 43,961 psi | 75% | 2503 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,652 psi | 64% | 2395 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 35,940 psi | 61% | 2421 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 34,171 psi | 58% | 2454 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,342 psi | 52% | 2251 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 43,366 psi | 74% | 2546 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,614 psi | 78% | 2625 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,298 psi | 52% | 2398 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,958 psi | 68% | 2474 fps | 98.5% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 94 powders for .30-06 R Stief loaded with the .308 | 175gr | Berger LRBT Target. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,779 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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.