Load Specifications
Load data in caliber 8 x 64 with .319 | 200gr | Frontier PH HPFB bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 50,807 psi | 86% | 2434 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,170 psi | 89% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 51,866 psi | 88% | 2493 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 50,546 psi | 86% | 2510 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,924 psi | 88% | 2484 fps | 95.8% |
| Accurate 4064 | <<locked>> | 92% | 51,895 psi | 88% | 2536 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,705 psi | 86% | 2595 fps | 99% |
| ADI AR 2206H | <<locked>> | 88% | 53,098 psi | 90% | 2562 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 50,821 psi | 87% | 2516 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 86% | 52,286 psi | 89% | 2520 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 52,547 psi | 89% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 52,315 psi | 89% | 2667 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 50,198 psi | 85% | 2533 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 51,053 psi | 87% | 2552 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,632 psi | 84% | 2602 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 96% | 50,415 psi | 86% | 2638 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,128 psi | 60% | 2352 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 52,489 psi | 89% | 2572 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 50,430 psi | 86% | 2546 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 51,285 psi | 87% | 2513 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 84% | 51,039 psi | 87% | 2461 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 50,923 psi | 87% | 2546 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,707 psi | 90% | 2631 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 52,910 psi | 90% | 2516 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 51,576 psi | 88% | 2556 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 50,575 psi | 86% | 2592 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 86% | 50,314 psi | 86% | 2526 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,658 psi | 78% | 2490 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,156 psi | 89% | 2598 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 51,459 psi | 88% | 2621 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,143 psi | 60% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 51,430 psi | 88% | 2526 fps | 99.8% |
| IMR 3031 | <<locked>> | 86% | 49,763 psi | 85% | 2513 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 50,183 psi | 85% | 2497 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 50,488 psi | 86% | 2474 fps | 96.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,995 psi | 87% | 2533 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,127 psi | 90% | 2543 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,066 psi | 82% | 2539 fps | 98.7% |
| IMR 4895 | <<locked>> | 90% | 52,330 psi | 89% | 2582 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 52,286 psi | 89% | 2520 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 52,301 psi | 89% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 52,156 psi | 89% | 2539 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,127 psi | 90% | 2500 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 53,113 psi | 90% | 2543 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 52,243 psi | 89% | 2539 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,692 psi | 90% | 2566 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 51,735 psi | 88% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 88% | 52,257 psi | 89% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 90% | 50,227 psi | 86% | 2543 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 50,198 psi | 85% | 2589 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 90% | 50,328 psi | 86% | 2566 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,371 psi | 84% | 2582 fps | 97.3% |
| Ramshot TAC | <<locked>> | 86% | 52,330 psi | 89% | 2533 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 51,779 psi | 88% | 2552 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 49,864 psi | 85% | 2474 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 60% | 1572 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 51,808 psi | 88% | 2503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,315 psi | 89% | 2539 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 50,676 psi | 86% | 2608 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 50,140 psi | 85% | 2641 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,270 psi | 86% | 2615 fps | 98.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,763 psi | 86% | 2635 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 86% | 53,156 psi | 90% | 2500 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 52,228 psi | 89% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 50,314 psi | 86% | 2539 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 51,285 psi | 87% | 2513 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 52,243 psi | 89% | 2539 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 52,156 psi | 89% | 2539 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,113 psi | 90% | 2543 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,692 psi | 90% | 2566 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 51,895 psi | 88% | 2595 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 50,618 psi | 86% | 2510 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 51,285 psi | 87% | 2536 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 50,691 psi | 86% | 2421 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 50,212 psi | 85% | 2418 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 52,402 psi | 89% | 2493 fps | 96.8% |
| Somchem S321 | <<locked>> | 82% | 49,821 psi | 85% | 2503 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 52,823 psi | 90% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 50,024 psi | 85% | 2503 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 50,850 psi | 87% | 2536 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,788 psi | 76% | 2543 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 82% | 50,488 psi | 86% | 2392 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 50,836 psi | 87% | 2411 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 51,663 psi | 88% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 52,591 psi | 90% | 2497 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 52,344 psi | 89% | 2523 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,881 psi | 90% | 2585 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 86% | 52,678 psi | 90% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 50,763 psi | 86% | 2493 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,909 psi | 88% | 2592 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,565 psi | 64% | 2421 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 50,256 psi | 86% | 2526 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 52,185 psi | 89% | 2562 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 50,865 psi | 87% | 2595 fps | 96.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 51,068 psi | 87% | 2546 fps | 99.9% |
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% | 44,846 psi | 76% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,979 psi | 83% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,579 psi | 64% | 2280 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,106 psi | 75% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 48,776 psi | 83% | 2438 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 35,491 psi | 60% | 2270 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 35,998 psi | 61% | 2343 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 41,249 psi | 70% | 2369 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 35,288 psi | 60% | 2238 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,265 psi | 74% | 2379 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,989 psi | 73% | 2375 fps | 100% |
| Alliant Power Pro 2000-MR | 46.3 gr | 80% | 37,347 psi | 64% | 2388 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,461 psi | 59% | 2254 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,043 psi | 63% | 2310 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,432 psi | 59% | 2303 fps | 95% |
| Alliant Reloder-17 | 46.7 gr | 82% | 31,749 psi | 54% | 2267 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,227 psi | 53% | 2257 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,132 psi | 68% | 2369 fps | 97.1% |
| Bofors RP3 | <<locked>> | 80% | 33,866 psi | 58% | 2254 fps | 97.5% |
| Bofors RP7 | <<locked>> | 94% | 48,138 psi | 82% | 2467 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,353 psi | 77% | 2375 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,814 psi | 71% | 2402 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,977 psi | 78% | 2526 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 49,545 psi | 84% | 2470 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,289 psi | 63% | 2306 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 94% | 44,483 psi | 76% | 2493 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 41,568 psi | 71% | 2382 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 29,631 psi | 50% | 2165 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,536 psi | 64% | 2356 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 47,993 psi | 82% | 2566 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,049 psi | 44% | 1371 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,030 psi | 68% | 2339 fps | 98.5% |
| IMR 3031 | <<locked>> | 80% | 41,060 psi | 70% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,999 psi | 63% | 2267 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 44,846 psi | 76% | 2382 fps | 95.1% |
| IMR 4350 | <<locked>> | 98% | 47,848 psi | 81% | 2487 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,181 psi | 80% | 2451 fps | 95.6% |
| IMR 4831 | <<locked>> | 90% | 34,766 psi | 59% | 2300 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,927 psi | 65% | 2336 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 80% | 43,265 psi | 74% | 2379 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 48,791 psi | 83% | 2461 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,118 psi | 68% | 2356 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 41,843 psi | 71% | 2320 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 36,825 psi | 63% | 2274 fps | 98.5% |
| Lovex S065 | <<locked>> | 90% | 40,915 psi | 70% | 2352 fps | 95.6% |
| Lovex S070 | <<locked>> | 94% | 43,845 psi | 75% | 2425 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 40,553 psi | 69% | 2333 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 40,611 psi | 69% | 2339 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,434 psi | 62% | 2300 fps | 97.3% |
| Norma URP | <<locked>> | 90% | 36,405 psi | 62% | 2343 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 35,926 psi | 61% | 2310 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 96% | 43,279 psi | 74% | 2477 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 43,105 psi | 73% | 2382 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,467 psi | 72% | 2402 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,905 psi | 80% | 2428 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 45% | 1404 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,631 psi | 83% | 2457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,149 psi | 73% | 2392 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,624 psi | 66% | 2402 fps | 97.3% |
| ReloadSwiss RS 60 | 45.6 gr | 80% | 31,763 psi | 54% | 2277 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,839 psi | 61% | 2356 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,928 psi | 66% | 2418 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 44,527 psi | 76% | 2372 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,609 psi | 66% | 2290 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 31,981 psi | 54% | 2208 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 94% | 48,138 psi | 82% | 2467 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,915 psi | 70% | 2352 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,118 psi | 68% | 2356 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 36,825 psi | 63% | 2274 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 43,845 psi | 75% | 2425 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,011 psi | 56% | 2251 fps | 95.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,307 psi | 70% | 2356 fps | 96.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,914 psi | 68% | 2346 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,105 psi | 72% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,809 psi | 59% | 2175 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,890 psi | 78% | 2395 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 46,499 psi | 79% | 2451 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 41,640 psi | 71% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,930 psi | 70% | 2356 fps | 98.2% |
| Somchem S355 | <<locked>> | 80% | 32,967 psi | 56% | 2215 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 27,050 psi | 46% | 2149 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 47,659 psi | 81% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,337 psi | 72% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,840 psi | 64% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,566 psi | 66% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,314 psi | 53% | 2159 fps | 97.5% |
| Vihtavuori N160 | <<locked>> | 88% | 35,897 psi | 61% | 2297 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 43,308 psi | 74% | 2379 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,014 psi | 63% | 2274 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 90% | 37,405 psi | 64% | 2346 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 96% | 33,141 psi | 56% | 2326 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 29,762 psi | 51% | 2133 fps | 95.1% |
| Winchester 748 | <<locked>> | 80% | 42,641 psi | 73% | 2418 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 44,483 psi | 76% | 2493 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,059 psi | 66% | 2346 fps | 98.4% |
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 95 powders for 8 x 64 loaded with the .319 | 200gr | Frontier PH HPFB. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,667 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,667 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.319" calls for a 1:12.5 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for 8 x 64 with the .319 | 200gr | Frontier PH HPFB 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.