Load Specifications
Load data in caliber 8 x 64 S with .323 | 196gr | Sellier & Bellot HPC bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR 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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 51,619 psi | 88% | 2503 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 49,748 psi | 85% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 52,402 psi | 89% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 51,039 psi | 87% | 2572 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 51,880 psi | 88% | 2598 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,413 psi | 81% | 2602 fps | 98% |
| ADI AR 2206H | <<locked>> | 88% | 50,604 psi | 86% | 2582 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 94% | 51,547 psi | 88% | 2579 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 49,995 psi | 85% | 2543 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 88% | 53,026 psi | 90% | 2572 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 51,010 psi | 87% | 2631 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 52,968 psi | 90% | 2726 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 50,633 psi | 86% | 2595 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 51,532 psi | 88% | 2507 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 51,547 psi | 88% | 2618 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,166 psi | 80% | 2608 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 50,763 psi | 86% | 2697 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 50,009 psi | 85% | 2592 fps | 98.5% |
| Bofors RP3 | <<locked>> | 94% | 50,691 psi | 86% | 2608 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 51,909 psi | 88% | 2530 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 51,663 psi | 88% | 2612 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 49,719 psi | 85% | 2644 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 82% | 50,343 psi | 86% | 2539 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 51,024 psi | 87% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 52,272 psi | 89% | 2618 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,865 psi | 87% | 2648 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 51,082 psi | 87% | 2592 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,207 psi | 74% | 2500 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 52,707 psi | 90% | 2664 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,780 psi | 59% | 1565 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 52,243 psi | 89% | 2595 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 50,183 psi | 85% | 2582 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 50,995 psi | 87% | 2562 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 51,692 psi | 88% | 2543 fps | 95.9% |
| IMR 4198 | <<locked>> | 82% | 52,025 psi | 89% | 2470 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,179 psi | 77% | 2546 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 52,808 psi | 90% | 2644 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 49,995 psi | 85% | 2543 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 84% | 52,953 psi | 90% | 2575 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 52,837 psi | 90% | 2608 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,734 psi | 86% | 2516 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 50,517 psi | 86% | 2562 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,649 psi | 90% | 2595 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 49,980 psi | 85% | 2575 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 52,576 psi | 90% | 2579 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 53,040 psi | 90% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 92% | 50,705 psi | 86% | 2605 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 47,297 psi | 81% | 2595 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 92% | 50,734 psi | 86% | 2625 fps | 99.2% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 46,615 psi | 79% | 2585 fps | 95.8% |
| Ramshot TAC | <<locked>> | 86% | 50,140 psi | 85% | 2549 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 52,591 psi | 90% | 2618 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 50,923 psi | 87% | 2543 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,230 psi | 60% | 1604 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 52,881 psi | 90% | 2575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,055 psi | 90% | 2602 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 51,169 psi | 87% | 2674 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 50,894 psi | 87% | 2707 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,963 psi | 80% | 2618 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,182 psi | 82% | 2641 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 86% | 50,720 psi | 86% | 2526 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 52,794 psi | 90% | 2575 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 50,575 psi | 86% | 2598 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,649 psi | 90% | 2595 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 52,837 psi | 90% | 2608 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 50,517 psi | 86% | 2562 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 49,980 psi | 85% | 2575 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,446 psi | 89% | 2543 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 52,315 psi | 89% | 2654 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 52,373 psi | 89% | 2526 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 51,430 psi | 88% | 2575 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 52,141 psi | 89% | 2602 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 51,343 psi | 87% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 51,126 psi | 87% | 2487 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,055 psi | 90% | 2552 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 50,705 psi | 86% | 2572 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 50,575 psi | 86% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 51,082 psi | 87% | 2572 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 51,256 psi | 87% | 2598 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 42,148 psi | 72% | 2549 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 51,285 psi | 87% | 2461 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 51,387 psi | 87% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 52,083 psi | 89% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 50,038 psi | 85% | 2523 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 52,721 psi | 90% | 2585 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,879 psi | 85% | 2598 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 86% | 50,256 psi | 86% | 2539 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 51,576 psi | 88% | 2562 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,849 psi | 83% | 2602 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,894 psi | 87% | 2585 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 52,663 psi | 90% | 2628 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,140 psi | 87% | 2654 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 51,779 psi | 88% | 2608 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 42,830 psi | 73% | 2375 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,412 psi | 79% | 2470 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,447 psi | 60% | 2300 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,626 psi | 71% | 2428 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 33,504 psi | 57% | 2283 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 36,013 psi | 61% | 2395 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 39,276 psi | 67% | 2382 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 35,650 psi | 61% | 2293 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,263 psi | 70% | 2398 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 40,611 psi | 69% | 2398 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,848 psi | 81% | 2579 fps | 99.4% |
| Alliant Power Pro 2000-MR | 48.3 gr | 82% | 37,869 psi | 64% | 2444 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,634 psi | 56% | 2264 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,312 psi | 82% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,143 psi | 60% | 2316 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,869 psi | 63% | 2402 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 84% | 32,097 psi | 55% | 2320 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,159 psi | 65% | 2382 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 31,937 psi | 54% | 2260 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,482 psi | 74% | 2395 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,479 psi | 67% | 2411 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,279 psi | 74% | 2533 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 47,195 psi | 80% | 2493 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,935 psi | 82% | 2516 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,277 psi | 69% | 2415 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 47,732 psi | 81% | 2595 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 39,537 psi | 67% | 2395 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 31,633 psi | 54% | 2257 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,447 psi | 60% | 2359 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,889 psi | 44% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,145 psi | 65% | 2352 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 38,580 psi | 66% | 2398 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,056 psi | 60% | 2274 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 48,327 psi | 82% | 2487 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 49,052 psi | 84% | 2431 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 37,202 psi | 63% | 2398 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 35,955 psi | 61% | 2346 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 41,263 psi | 70% | 2398 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 46,427 psi | 79% | 2480 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 37,811 psi | 64% | 2369 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 39,871 psi | 68% | 2333 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 34,809 psi | 59% | 2280 fps | 97.5% |
| Lovex S065 | <<locked>> | 94% | 43,758 psi | 74% | 2454 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 46,934 psi | 80% | 2526 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 38,653 psi | 66% | 2346 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 38,609 psi | 66% | 2359 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 34,534 psi | 59% | 2306 fps | 96% |
| Norma URP | <<locked>> | 94% | 39,059 psi | 66% | 2444 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 80% | 33,953 psi | 58% | 2313 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 98% | 43,845 psi | 75% | 2536 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 41,220 psi | 70% | 2395 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,408 psi | 69% | 2415 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,643 psi | 76% | 2441 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 45% | 1434 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,354 psi | 79% | 2480 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,630 psi | 79% | 2503 fps | 95.5% |
| ReloadSwiss RS 52 | 45.7 gr | 80% | 36,376 psi | 62% | 2405 fps | 95.9% |
| ReloadSwiss RS 60 | 46.4 gr | 80% | 30,066 psi | 51% | 2274 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 38,537 psi | 66% | 2461 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 42,003 psi | 72% | 2523 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 42,337 psi | 72% | 2392 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 36,637 psi | 62% | 2300 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 30,153 psi | 51% | 2211 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 43,758 psi | 74% | 2454 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,811 psi | 64% | 2369 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 34,809 psi | 59% | 2280 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 98% | 46,934 psi | 80% | 2526 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,950 psi | 83% | 2493 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,257 psi | 57% | 2303 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,066 psi | 84% | 2480 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 39,276 psi | 67% | 2369 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,884 psi | 64% | 2356 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,132 psi | 68% | 2313 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,025 psi | 56% | 2188 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 49,661 psi | 85% | 2503 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 44,309 psi | 75% | 2470 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 39,755 psi | 68% | 2320 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,899 psi | 66% | 2369 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 31,241 psi | 53% | 2221 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 28,892 psi | 49% | 2244 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 45,469 psi | 77% | 2379 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,292 psi | 69% | 2313 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,665 psi | 61% | 2293 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,666 psi | 62% | 2303 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 29,646 psi | 50% | 2169 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 92% | 38,624 psi | 66% | 2402 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 41,205 psi | 70% | 2392 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 35,128 psi | 60% | 2287 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 37,739 psi | 64% | 2402 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,271 psi | 55% | 2238 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 40,277 psi | 69% | 2431 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 47,993 psi | 82% | 2602 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,912 psi | 63% | 2356 fps | 97.3% |
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 107 powders for 8 x 64 S loaded with the .323 | 196gr | Sellier & Bellot HPC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,726 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 196.0 gr projectile in 0.323" calls for a 1:12.5 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 8 x 64 S with the .323 | 196gr | Sellier & Bellot HPC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 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.