Load Specifications
Load data in caliber 8 x 64 S with .323 | 220gr | Barnes Solid RN bullet and 94 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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>> | 84% | 52,417 psi | 89% | 2359 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 50,343 psi | 86% | 2379 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,272 psi | 89% | 2438 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,212 psi | 85% | 2372 fps | 96.1% |
| Accurate 4064 | <<locked>> | 90% | 50,401 psi | 86% | 2421 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,707 psi | 90% | 2530 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 51,387 psi | 87% | 2448 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 52,330 psi | 89% | 2444 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 50,604 psi | 86% | 2405 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 50,923 psi | 87% | 2382 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 50,372 psi | 86% | 2543 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 51,837 psi | 88% | 2464 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,692 psi | 90% | 2484 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,213 psi | 87% | 2536 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,083 psi | 89% | 2569 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,521 psi | 62% | 2306 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,103 psi | 68% | 2434 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 50,894 psi | 87% | 2461 fps | 99.4% |
| Bofors RP3 | <<locked>> | 92% | 52,199 psi | 89% | 2477 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,808 psi | 90% | 2451 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,489 psi | 89% | 2388 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,910 psi | 90% | 2477 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 50,850 psi | 87% | 2510 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 90% | 49,937 psi | 85% | 2441 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 52,315 psi | 89% | 2530 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 94% | 50,299 psi | 86% | 2451 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 86% | 51,909 psi | 88% | 2454 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,558 psi | 81% | 2431 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 50,633 psi | 86% | 2484 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 49,705 psi | 85% | 2510 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 60% | 1480 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,997 psi | 90% | 2457 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 51,532 psi | 88% | 2441 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 51,721 psi | 88% | 2428 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,170 psi | 89% | 2415 fps | 97.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,533 psi | 89% | 2470 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,358 psi | 87% | 2431 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,125 psi | 85% | 2480 fps | 99.3% |
| IMR 4895 | <<locked>> | 88% | 50,720 psi | 86% | 2464 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 50,604 psi | 86% | 2405 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 50,589 psi | 86% | 2425 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 51,343 psi | 87% | 2382 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 51,459 psi | 88% | 2428 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 50,604 psi | 86% | 2428 fps | 98.3% |
| Lovex S070 | <<locked>> | 98% | 51,300 psi | 87% | 2457 fps | 97.5% |
| Norma 201 | <<locked>> | 86% | 50,386 psi | 86% | 2402 fps | 100% |
| Norma 202 | <<locked>> | 86% | 50,604 psi | 86% | 2402 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,866 psi | 88% | 2474 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,996 psi | 89% | 2520 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 52,040 psi | 89% | 2497 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,923 psi | 87% | 2516 fps | 98.1% |
| Ramshot TAC | <<locked>> | 84% | 50,676 psi | 86% | 2418 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 49,922 psi | 85% | 2431 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 51,285 psi | 87% | 2405 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 61% | 1516 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 50,676 psi | 86% | 2428 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,837 psi | 90% | 2543 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,069 psi | 89% | 2572 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,446 psi | 89% | 2556 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,620 psi | 90% | 2575 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 51,488 psi | 88% | 2385 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 50,894 psi | 87% | 2398 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,083 psi | 89% | 2470 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 52,808 psi | 90% | 2451 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 96% | 50,604 psi | 86% | 2428 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 50,589 psi | 86% | 2425 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 51,459 psi | 88% | 2428 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 51,300 psi | 87% | 2457 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 50,343 psi | 86% | 2480 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,257 psi | 89% | 2444 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,156 psi | 90% | 2470 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 51,880 psi | 88% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 51,706 psi | 88% | 2346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,908 psi | 87% | 2385 fps | 97.1% |
| Somchem S321 | <<locked>> | 82% | 51,372 psi | 87% | 2431 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 51,387 psi | 87% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 51,924 psi | 88% | 2441 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 52,475 psi | 89% | 2467 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,441 psi | 79% | 2477 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 51,996 psi | 89% | 2316 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,069 psi | 89% | 2336 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 50,314 psi | 86% | 2372 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 51,184 psi | 87% | 2385 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 50,633 psi | 86% | 2408 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 51,213 psi | 87% | 2470 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 50,865 psi | 87% | 2402 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,344 psi | 89% | 2421 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 50,343 psi | 86% | 2480 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,363 psi | 67% | 2372 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,735 psi | 88% | 2457 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 50,270 psi | 86% | 2444 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,605 psi | 90% | 2533 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,474 psi | 55% | 2290 fps | 97.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,692 psi | 90% | 2474 fps | 100% |
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% | 46,369 psi | 79% | 2280 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,073 psi | 67% | 2218 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,672 psi | 78% | 2346 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 46,920 psi | 80% | 2323 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 36,956 psi | 63% | 2211 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,735 psi | 56% | 2192 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 42,598 psi | 73% | 2310 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 36,245 psi | 62% | 2178 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,643 psi | 76% | 2316 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,672 psi | 76% | 2303 fps | 100% |
| Alliant Power Pro 2000-MR | 46.6 gr | 80% | 38,624 psi | 66% | 2333 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,723 psi | 61% | 2198 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,377 psi | 65% | 2251 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,562 psi | 57% | 2205 fps | 95.5% |
| Alliant Reloder-17 | 45.8 gr | 80% | 30,690 psi | 52% | 2162 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,732 psi | 49% | 2116 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,099 psi | 60% | 2323 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,510 psi | 71% | 2310 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 35,244 psi | 60% | 2201 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 46,557 psi | 79% | 2356 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,412 psi | 79% | 2303 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,294 psi | 74% | 2336 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,659 psi | 81% | 2461 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 36,216 psi | 62% | 2205 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 92% | 43,149 psi | 73% | 2382 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 92% | 47,210 psi | 80% | 2402 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,946 psi | 73% | 2316 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,805 psi | 49% | 2070 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,928 psi | 66% | 2297 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 94% | 46,122 psi | 79% | 2451 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,223 psi | 45% | 1319 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,350 psi | 70% | 2277 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,395 psi | 72% | 2313 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,014 psi | 65% | 2205 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,091 psi | 73% | 2270 fps | 95.3% |
| IMR 4350 | <<locked>> | 96% | 46,630 psi | 79% | 2382 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,960 psi | 73% | 2297 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 31,923 psi | 54% | 2156 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 39,276 psi | 67% | 2277 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,643 psi | 76% | 2316 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 41,365 psi | 70% | 2290 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,844 psi | 73% | 2254 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 37,913 psi | 65% | 2211 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 37,507 psi | 64% | 2205 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 42,511 psi | 72% | 2316 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,916 psi | 71% | 2270 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 42,032 psi | 72% | 2277 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,797 psi | 64% | 2241 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 33,359 psi | 57% | 2195 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,217 psi | 63% | 2254 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 39,479 psi | 67% | 2323 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,411 psi | 76% | 2320 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,816 psi | 75% | 2339 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,283 psi | 82% | 2362 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,571 psi | 45% | 1352 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,568 psi | 71% | 2280 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,900 psi | 68% | 2339 fps | 98.2% |
| ReloadSwiss RS 60 | 45.8 gr | 80% | 32,663 psi | 56% | 2221 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,867 psi | 59% | 2257 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,724 psi | 64% | 2313 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,687 psi | 78% | 2300 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,726 psi | 68% | 2224 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 33,083 psi | 56% | 2152 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 46,557 psi | 79% | 2356 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,507 psi | 64% | 2205 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,365 psi | 70% | 2290 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,913 psi | 65% | 2211 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 42,511 psi | 72% | 2316 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,026 psi | 58% | 2195 fps | 97% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,699 psi | 73% | 2297 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,017 psi | 70% | 2280 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,178 psi | 74% | 2224 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,810 psi | 61% | 2113 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,771 psi | 71% | 2247 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,993 psi | 82% | 2385 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,902 psi | 73% | 2231 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,322 psi | 72% | 2297 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 34,214 psi | 58% | 2162 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 26,339 psi | 45% | 2057 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,791 psi | 83% | 2277 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,453 psi | 74% | 2221 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,044 psi | 66% | 2211 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,668 psi | 68% | 2218 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,300 psi | 55% | 2103 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 86% | 34,882 psi | 59% | 2195 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,701 psi | 76% | 2313 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,305 psi | 65% | 2215 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,185 psi | 58% | 2198 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 30,472 psi | 52% | 2182 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,732 psi | 49% | 2034 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 44,193 psi | 75% | 2356 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,149 psi | 73% | 2382 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,732 psi | 49% | 2182 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,451 psi | 69% | 2287 fps | 99.1% |
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 94 powders for 8 x 64 S loaded with the .323 | 220gr | Barnes Solid RN. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,575 fps; across all powders the maximum-charge window runs from 1,480 fps to 2,575 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 220.0 gr projectile in 0.323" calls for a 1:13.5 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. Alliant Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 8 x 64 S with the .323 | 220gr | Barnes Solid RN they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.