Load Specifications
Load data in caliber .30-06 Spring. with .308 | 168gr | Nosler RDF 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, ReloadSwiss RS 60 and Alliant Reloder-17.
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>> | 86% | 52,692 psi | 90% | 2625 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 50,981 psi | 87% | 2644 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 50,227 psi | 86% | 2638 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,678 psi | 90% | 2703 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 50,285 psi | 86% | 2680 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,298 psi | 84% | 2736 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 88% | 51,634 psi | 88% | 2707 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 52,678 psi | 90% | 2707 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 50,923 psi | 87% | 2667 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 50,879 psi | 87% | 2651 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,489 psi | 89% | 2766 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 50,850 psi | 87% | 2805 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 52,228 psi | 89% | 2726 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 52,417 psi | 89% | 2631 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 52,852 psi | 90% | 2746 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,269 psi | 82% | 2736 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,518 psi | 89% | 2835 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,343 psi | 87% | 2720 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 52,257 psi | 89% | 2736 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 52,953 psi | 90% | 2654 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 49,763 psi | 85% | 2690 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,300 psi | 87% | 2779 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 51,459 psi | 88% | 2667 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,359 psi | 89% | 2690 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 50,386 psi | 86% | 2697 fps | 98% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,649 psi | 90% | 2785 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 52,112 psi | 89% | 2720 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,512 psi | 76% | 2625 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 50,850 psi | 87% | 2746 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 60% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,314 psi | 86% | 2674 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 51,561 psi | 88% | 2710 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 52,054 psi | 89% | 2687 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 52,707 psi | 90% | 2667 fps | 96.2% |
| IMR 4198 | <<locked>> | 82% | 52,649 psi | 90% | 2592 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,083 psi | 89% | 2687 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,775 psi | 80% | 2677 fps | 98% |
| IMR 4895 | <<locked>> | 90% | 50,792 psi | 86% | 2726 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 50,923 psi | 87% | 2667 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 50,807 psi | 86% | 2651 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 50,879 psi | 87% | 2690 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 51,837 psi | 88% | 2644 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 51,590 psi | 88% | 2687 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 50,807 psi | 86% | 2674 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,532 psi | 88% | 2707 fps | 96.3% |
| Norma 201 | <<locked>> | 88% | 50,604 psi | 86% | 2661 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 50,763 psi | 86% | 2664 fps | 100% |
| Norma 203B | <<locked>> | 92% | 52,011 psi | 89% | 2733 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 48,950 psi | 83% | 2726 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 52,359 psi | 89% | 2756 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 47,993 psi | 82% | 2713 fps | 96.3% |
| Ramshot TAC | <<locked>> | 86% | 51,300 psi | 87% | 2677 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 50,386 psi | 86% | 2694 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 51,909 psi | 88% | 2664 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,259 psi | 60% | 1696 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 50,459 psi | 86% | 2651 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 50,894 psi | 87% | 2677 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 52,721 psi | 90% | 2805 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,228 psi | 89% | 2835 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,892 psi | 83% | 2753 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,661 psi | 85% | 2772 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 86% | 51,721 psi | 88% | 2651 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 51,169 psi | 87% | 2661 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 52,112 psi | 89% | 2726 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 50,807 psi | 86% | 2674 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 50,879 psi | 87% | 2690 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 51,590 psi | 88% | 2687 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,532 psi | 88% | 2707 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 50,662 psi | 86% | 2740 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 52,765 psi | 90% | 2703 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,198 psi | 85% | 2680 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 52,388 psi | 89% | 2608 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 52,170 psi | 89% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,256 psi | 87% | 2631 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 51,866 psi | 88% | 2697 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 51,735 psi | 88% | 2612 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,417 psi | 89% | 2700 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 52,678 psi | 90% | 2726 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,627 psi | 74% | 2677 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 52,446 psi | 89% | 2582 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 52,460 psi | 89% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,386 psi | 86% | 2635 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 51,401 psi | 88% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 50,865 psi | 87% | 2664 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,547 psi | 88% | 2726 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 86% | 51,213 psi | 87% | 2664 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 52,895 psi | 90% | 2687 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,343 psi | 86% | 2726 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,477 psi | 62% | 2546 fps | 96% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,460 psi | 89% | 2713 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 50,604 psi | 86% | 2710 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,649 psi | 90% | 2785 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 49,603 psi | 84% | 2684 fps | 99.5% |
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% | 43,845 psi | 75% | 2497 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,529 psi | 81% | 2595 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,274 psi | 62% | 2411 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,728 psi | 73% | 2549 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 34,287 psi | 58% | 2398 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 37,202 psi | 63% | 2516 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 40,263 psi | 69% | 2507 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 82% | 36,361 psi | 62% | 2408 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,308 psi | 72% | 2520 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 41,510 psi | 71% | 2516 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,139 psi | 84% | 2713 fps | 99.5% |
| Alliant Power Pro 2000-MR | 46.4 gr | 80% | 36,230 psi | 62% | 2510 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,562 psi | 57% | 2382 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,356 psi | 84% | 2585 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,129 psi | 62% | 2441 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 37,884 psi | 64% | 2530 fps | 95.5% |
| Alliant Reloder-17 | 48 gr | 84% | 33,025 psi | 56% | 2441 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,175 psi | 67% | 2503 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 32,735 psi | 56% | 2375 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,193 psi | 75% | 2513 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,509 psi | 69% | 2533 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,483 psi | 76% | 2664 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 48,124 psi | 82% | 2618 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,139 psi | 84% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 38,609 psi | 66% | 2484 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 98% | 49,356 psi | 84% | 2730 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 40,596 psi | 69% | 2520 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,503 psi | 55% | 2375 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,332 psi | 62% | 2480 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,991 psi | 44% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,914 psi | 66% | 2470 fps | 97.7% |
| IMR 3031 | <<locked>> | 80% | 39,668 psi | 68% | 2520 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,911 psi | 61% | 2395 fps | 95.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,487 psi | 84% | 2615 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 49,893 psi | 85% | 2556 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 48,950 psi | 83% | 2635 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 36,071 psi | 61% | 2474 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 36,985 psi | 63% | 2470 fps | 96.8% |
| IMR 8208 XBR | <<locked>> | 80% | 42,308 psi | 72% | 2520 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 47,355 psi | 81% | 2598 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 38,783 psi | 66% | 2487 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 40,785 psi | 69% | 2454 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 35,694 psi | 61% | 2402 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 42,322 psi | 72% | 2530 fps | 95.3% |
| Lovex S070 | <<locked>> | 98% | 48,341 psi | 82% | 2654 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 39,392 psi | 67% | 2464 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 39,624 psi | 67% | 2480 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 35,534 psi | 60% | 2428 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 37,855 psi | 64% | 2520 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 34,853 psi | 59% | 2431 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 98% | 45,005 psi | 77% | 2657 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 42,177 psi | 72% | 2516 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,466 psi | 71% | 2536 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,672 psi | 78% | 2562 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 45% | 1516 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,340 psi | 81% | 2602 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 44,875 psi | 76% | 2575 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,318 psi | 64% | 2526 fps | 96.2% |
| ReloadSwiss RS 60 | 45.7 gr | 80% | 30,792 psi | 52% | 2395 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 39,697 psi | 68% | 2585 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,424 psi | 74% | 2657 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 43,308 psi | 74% | 2513 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 37,507 psi | 64% | 2418 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 30,893 psi | 53% | 2326 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,322 psi | 72% | 2530 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,783 psi | 66% | 2487 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 35,694 psi | 61% | 2402 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 48,341 psi | 82% | 2654 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,113 psi | 58% | 2421 fps | 95.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,089 psi | 68% | 2484 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,740 psi | 66% | 2474 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,002 psi | 70% | 2431 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,779 psi | 58% | 2303 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 47,877 psi | 82% | 2579 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 45,469 psi | 77% | 2595 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 40,495 psi | 69% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,929 psi | 68% | 2487 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 31,923 psi | 54% | 2336 fps | 95.5% |
| Somchem S365 | <<locked>> | 88% | 29,747 psi | 51% | 2365 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,383 psi | 79% | 2497 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,147 psi | 70% | 2431 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,579 psi | 62% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,391 psi | 64% | 2415 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 30,284 psi | 52% | 2277 fps | 96.5% |
| Vihtavuori N160 | <<locked>> | 90% | 37,130 psi | 63% | 2467 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,061 psi | 72% | 2513 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 35,926 psi | 61% | 2402 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 38,885 psi | 66% | 2523 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 34,171 psi | 58% | 2493 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,040 psi | 56% | 2349 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 41,321 psi | 70% | 2552 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 49,356 psi | 84% | 2730 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,869 psi | 64% | 2474 fps | 97.6% |
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 105 powders for .30-06 Spring. loaded with the .308 | 168gr | Nosler RDF. Alliant Reloder-17 delivers the highest muzzle velocity at 2,835 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,835 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .30-06 Spring. with the .308 | 168gr | Nosler RDF they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 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.