Load Specifications
Load data in caliber .308 Win. with .308 | 178gr | Remington SP Extended-Range bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Hodgdon CFE223 and ReloadSwiss RS 52.
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 2015 | <<locked>> | 90% | 53,896 psi | 90% | 2526 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,360 psi | 90% | 2612 fps | 98.8% |
| Accurate 2460 | <<locked>> | 86% | 52,388 psi | 87% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,085 psi | 90% | 2582 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,722 psi | 89% | 2605 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,592 psi | 89% | 2615 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,482 psi | 71% | 2513 fps | 96.4% |
| Accurate LT-30 | <<locked>> | 84% | 54,404 psi | 90% | 2480 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 51,634 psi | 86% | 2461 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,852 psi | 88% | 2605 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 98% | 53,780 psi | 89% | 2598 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 54,404 psi | 90% | 2589 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 52,446 psi | 87% | 2569 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 90% | 51,634 psi | 86% | 2556 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,751 psi | 89% | 2664 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 51,909 psi | 86% | 2697 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 52,692 psi | 88% | 2618 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,070 psi | 90% | 2536 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,664 psi | 89% | 2638 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,439 psi | 72% | 2523 fps | 96.5% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,719 psi | 83% | 2667 fps | 99.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,359 psi | 89% | 2480 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 52,315 psi | 87% | 2615 fps | 98.4% |
| Bofors RP3 | <<locked>> | 98% | 52,678 psi | 88% | 2628 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 51,590 psi | 86% | 2513 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,085 psi | 90% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 52,489 psi | 87% | 2677 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 86% | 52,881 psi | 88% | 2569 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,201 psi | 90% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 51,227 psi | 85% | 2592 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 92% | 53,258 psi | 88% | 2615 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,349 psi | 65% | 2418 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 51,459 psi | 85% | 2641 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,418 psi | 57% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 51,590 psi | 86% | 2575 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 52,083 psi | 87% | 2605 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,359 psi | 89% | 2585 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,375 psi | 90% | 2562 fps | 95.8% |
| IMR 4198 | <<locked>> | 84% | 51,358 psi | 85% | 2457 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,017 psi | 68% | 2467 fps | 96% |
| IMR 4895 | <<locked>> | 94% | 51,735 psi | 86% | 2621 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 90% | 52,446 psi | 87% | 2569 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 86% | 52,156 psi | 87% | 2556 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 51,430 psi | 85% | 2585 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,330 psi | 89% | 2543 fps | 99.2% |
| Lovex S062 | <<locked>> | 96% | 52,649 psi | 87% | 2585 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,544 psi | 81% | 2520 fps | 96.1% |
| Norma 200 | <<locked>> | 82% | 54,157 psi | 90% | 2510 fps | 100% |
| Norma 201 | <<locked>> | 92% | 51,793 psi | 86% | 2559 fps | 99.7% |
| Norma 202 | <<locked>> | 92% | 51,938 psi | 86% | 2566 fps | 100% |
| Norma 203B | <<locked>> | 96% | 52,721 psi | 88% | 2625 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 43,178 psi | 72% | 2513 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 96% | 53,185 psi | 88% | 2651 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 52,895 psi | 88% | 2579 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 90% | 51,851 psi | 86% | 2598 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,650 psi | 89% | 2569 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,664 psi | 58% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 52,257 psi | 87% | 2559 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 51,953 psi | 86% | 2572 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,185 psi | 88% | 2694 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,156 psi | 88% | 2730 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,496 psi | 71% | 2530 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 52,765 psi | 88% | 2546 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 52,127 psi | 87% | 2556 fps | 99.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,518 psi | 87% | 2618 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,544 psi | 81% | 2520 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 92% | 51,430 psi | 85% | 2585 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 52,649 psi | 87% | 2585 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 52,040 psi | 86% | 2526 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 51,213 psi | 85% | 2552 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,404 psi | 90% | 2677 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 51,793 psi | 86% | 2513 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,288 psi | 90% | 2602 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 51,155 psi | 85% | 2579 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,288 psi | 90% | 2516 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,200 psi | 88% | 2507 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,505 psi | 89% | 2602 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 53,055 psi | 88% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,548 psi | 89% | 2598 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,388 psi | 89% | 2618 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,232 psi | 64% | 2461 fps | 98.3% |
| Vihtavuori N130 | <<locked>> | 88% | 54,128 psi | 90% | 2490 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,085 psi | 90% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 53,940 psi | 90% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 52,402 psi | 87% | 2546 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,561 psi | 86% | 2559 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,556 psi | 76% | 2516 fps | 96.8% |
| Vihtavuori N530 | <<locked>> | 90% | 52,750 psi | 88% | 2566 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 53,911 psi | 90% | 2589 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,324 psi | 74% | 2516 fps | 96.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,934 psi | 78% | 2510 fps | 98.8% |
| Winchester 748 | <<locked>> | 90% | 51,808 psi | 86% | 2612 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,288 psi | 90% | 2638 fps | 99.6% |
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 2015 | <<locked>> | 80% | 39,653 psi | 66% | 2320 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 50,778 psi | 84% | 2559 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 42,786 psi | 71% | 2408 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 32,053 psi | 53% | 2231 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 38,145 psi | 63% | 2362 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 30,298 psi | 50% | 2211 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 39,436 psi | 66% | 2461 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 48,254 psi | 80% | 2398 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,631 psi | 81% | 2415 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,245 psi | 60% | 2313 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 37,391 psi | 62% | 2323 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 47,703 psi | 79% | 2497 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,189 psi | 63% | 2329 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 36,941 psi | 61% | 2343 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 43,990 psi | 73% | 2507 fps | 98.5% |
| Alliant Power Pro 2000-MR | 43.2 gr | 86% | 39,813 psi | 66% | 2474 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,894 psi | 53% | 2244 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,976 psi | 75% | 2411 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,709 psi | 61% | 2346 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,712 psi | 68% | 2470 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,736 psi | 56% | 2349 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,804 psi | 78% | 2392 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 40,306 psi | 67% | 2415 fps | 95.8% |
| Bofors RP3 | <<locked>> | 82% | 31,038 psi | 52% | 2238 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,596 psi | 67% | 2336 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,187 psi | 60% | 2343 fps | 97.9% |
| Hodgdon CFE223 | 41.2 gr | 80% | 39,885 psi | 66% | 2461 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 43,598 psi | 72% | 2434 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,092 psi | 73% | 2451 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 42,090 psi | 70% | 2441 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 36,477 psi | 61% | 2326 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,867 psi | 58% | 2323 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,561 psi | 54% | 2287 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,498 psi | 42% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,230 psi | 59% | 2283 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 35,375 psi | 59% | 2339 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 36,883 psi | 61% | 2306 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 50,966 psi | 85% | 2513 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 45,992 psi | 76% | 2382 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 38,276 psi | 64% | 2415 fps | 95.2% |
| IMR 4895 | <<locked>> | 82% | 35,302 psi | 59% | 2326 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,189 psi | 63% | 2329 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 42,670 psi | 71% | 2411 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 34,476 psi | 57% | 2300 fps | 98.4% |
| Lovex S060 | <<locked>> | 80% | 37,275 psi | 62% | 2270 fps | 96.2% |
| Lovex S062 | <<locked>> | 80% | 32,082 psi | 53% | 2218 fps | 96% |
| Lovex S065 | <<locked>> | 98% | 45,411 psi | 75% | 2470 fps | 95.4% |
| Norma 200 | <<locked>> | 80% | 50,662 psi | 84% | 2467 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,621 psi | 59% | 2280 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 35,534 psi | 59% | 2293 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 33,895 psi | 56% | 2290 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 40,350 psi | 67% | 2461 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 84% | 35,650 psi | 59% | 2343 fps | 95.3% |
| Ramshot TAC | <<locked>> | 84% | 43,424 psi | 72% | 2425 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,043 psi | 62% | 2343 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,582 psi | 69% | 2375 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,817 psi | 43% | 1414 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,076 psi | 72% | 2418 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,675 psi | 81% | 2520 fps | 95.3% |
| ReloadSwiss RS 52 | 40 gr | 82% | 35,592 psi | 59% | 2382 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,617 psi | 49% | 2251 fps | 95.8% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 40,001 psi | 66% | 2480 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 39,479 psi | 66% | 2333 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,982 psi | 56% | 2238 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 31,169 psi | 52% | 2234 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 98% | 45,411 psi | 75% | 2470 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,476 psi | 57% | 2300 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 32,082 psi | 53% | 2218 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,484 psi | 76% | 2428 fps | 98.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,964 psi | 80% | 2503 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,795 psi | 58% | 2329 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,701 psi | 76% | 2425 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,220 psi | 68% | 2395 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,954 psi | 58% | 2287 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,463 psi | 62% | 2257 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,589 psi | 51% | 2133 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 40,857 psi | 68% | 2402 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 36,811 psi | 61% | 2260 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 35,679 psi | 59% | 2297 fps | 95.5% |
| Somchem S355 | <<locked>> | 84% | 32,474 psi | 54% | 2247 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 29,936 psi | 50% | 2264 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 42,496 psi | 71% | 2329 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,478 psi | 62% | 2260 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,663 psi | 54% | 2234 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,547 psi | 56% | 2234 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 28,921 psi | 48% | 2149 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 96% | 40,045 psi | 67% | 2418 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 38,261 psi | 64% | 2329 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 80% | 32,387 psi | 54% | 2228 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 98% | 41,452 psi | 69% | 2467 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,852 psi | 56% | 2260 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 36,883 psi | 61% | 2362 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,924 psi | 56% | 2287 fps | 95.8% |
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 109 powders for .308 Win. loaded with the .308 | 178gr | Remington SP Extended-Range. ReloadSwiss RS 60 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 4350 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 178.0 gr projectile in 0.308" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 Power Pro 2000-MR, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .308 Win. with the .308 | 178gr | Remington SP Extended-Range they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Bofors RP7 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.