Load Specifications
Load data in caliber 8 x 64 with .321 | 180gr | Frontier PH HPFB bullet and 86 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% | 51,503 psi | 88% | 2592 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 53,011 psi | 90% | 2654 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 52,069 psi | 89% | 2648 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 51,039 psi | 87% | 2664 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 51,880 psi | 88% | 2687 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,239 psi | 80% | 2684 fps | 97.7% |
| ADI AR 2206H | <<locked>> | 88% | 50,415 psi | 86% | 2667 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 94% | 51,256 psi | 87% | 2664 fps | 98.7% |
| ADI Benchmark 8208 | <<locked>> | 88% | 52,953 psi | 90% | 2677 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 52,823 psi | 90% | 2661 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 50,894 psi | 87% | 2723 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 52,808 psi | 90% | 2818 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 50,604 psi | 86% | 2684 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 82% | 51,242 psi | 87% | 2595 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 51,532 psi | 88% | 2707 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,036 psi | 80% | 2694 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 98% | 50,807 psi | 86% | 2789 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 49,922 psi | 85% | 2677 fps | 98.2% |
| Bofors RP3 | <<locked>> | 94% | 50,937 psi | 87% | 2700 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 52,025 psi | 89% | 2621 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 51,605 psi | 88% | 2700 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 49,719 psi | 85% | 2733 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 82% | 50,227 psi | 86% | 2631 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 51,126 psi | 87% | 2654 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 52,141 psi | 89% | 2703 fps | 98% |
| Hodgdon H4895 | <<locked>> | 88% | 50,821 psi | 87% | 2677 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 43,062 psi | 73% | 2579 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 52,881 psi | 90% | 2759 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,766 psi | 59% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 52,243 psi | 89% | 2684 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 49,995 psi | 85% | 2671 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 50,763 psi | 86% | 2648 fps | 98.8% |
| IMR 4198 | <<locked>> | 82% | 51,808 psi | 88% | 2562 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,281 psi | 77% | 2635 fps | 97.3% |
| IMR 4895 | <<locked>> | 92% | 52,794 psi | 90% | 2736 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 52,953 psi | 90% | 2677 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 53,026 psi | 90% | 2664 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 52,808 psi | 90% | 2700 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,836 psi | 87% | 2608 fps | 99.1% |
| Lovex S062 | <<locked>> | 92% | 50,517 psi | 86% | 2651 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,504 psi | 89% | 2680 fps | 97.2% |
| Norma 201 | <<locked>> | 90% | 52,344 psi | 89% | 2667 fps | 99.8% |
| Norma 202 | <<locked>> | 90% | 52,750 psi | 90% | 2677 fps | 100% |
| Norma 203B | <<locked>> | 92% | 50,705 psi | 86% | 2694 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 47,123 psi | 80% | 2680 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 92% | 50,604 psi | 86% | 2713 fps | 99% |
| Ramshot TAC | <<locked>> | 86% | 50,111 psi | 85% | 2635 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 88% | 52,518 psi | 89% | 2707 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 50,691 psi | 86% | 2625 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 60% | 1670 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 52,649 psi | 90% | 2664 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 52,910 psi | 90% | 2687 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 51,111 psi | 87% | 2762 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 50,647 psi | 86% | 2795 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,978 psi | 80% | 2703 fps | 97.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,153 psi | 82% | 2726 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 86% | 50,633 psi | 86% | 2615 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 52,794 psi | 90% | 2664 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 50,502 psi | 86% | 2687 fps | 99.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,504 psi | 89% | 2680 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 52,808 psi | 90% | 2700 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 50,517 psi | 86% | 2651 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 52,199 psi | 89% | 2631 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 52,431 psi | 89% | 2749 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 52,069 psi | 89% | 2615 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 51,343 psi | 87% | 2661 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 52,112 psi | 89% | 2690 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 51,213 psi | 87% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 50,879 psi | 87% | 2572 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 50,720 psi | 86% | 2661 fps | 99.8% |
| Somchem S335 | <<locked>> | 88% | 50,386 psi | 86% | 2572 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 50,981 psi | 87% | 2661 fps | 99.1% |
| Somchem S355 | <<locked>> | 96% | 51,184 psi | 87% | 2687 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,989 psi | 71% | 2628 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 84% | 51,271 psi | 87% | 2549 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 51,242 psi | 87% | 2566 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 51,822 psi | 88% | 2638 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 50,053 psi | 85% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 52,634 psi | 90% | 2671 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,661 psi | 85% | 2680 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 86% | 50,067 psi | 85% | 2628 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 51,517 psi | 88% | 2651 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,950 psi | 83% | 2687 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,865 psi | 87% | 2671 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 52,620 psi | 90% | 2720 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 51,677 psi | 88% | 2700 fps | 99.6% |
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% | 42,815 psi | 73% | 2461 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 46,543 psi | 79% | 2559 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,157 psi | 60% | 2372 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,756 psi | 71% | 2513 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 33,272 psi | 57% | 2356 fps | 99% |
| Accurate 4350 | <<locked>> | 94% | 38,493 psi | 66% | 2523 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 39,189 psi | 67% | 2464 fps | 97% |
| ADI AR 2208 | <<locked>> | 82% | 35,607 psi | 61% | 2372 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,205 psi | 70% | 2480 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 40,596 psi | 69% | 2487 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 47,718 psi | 81% | 2667 fps | 99.2% |
| Alliant Power Pro 2000-MR | 49 gr | 82% | 37,710 psi | 64% | 2523 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,590 psi | 55% | 2339 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,356 psi | 82% | 2552 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 35,099 psi | 60% | 2395 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 94% | 39,218 psi | 67% | 2536 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,316 psi | 58% | 2451 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,014 psi | 65% | 2457 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 31,821 psi | 54% | 2336 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,221 psi | 74% | 2477 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 39,334 psi | 67% | 2490 fps | 98.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 43,337 psi | 74% | 2621 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 80% | 47,152 psi | 80% | 2582 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,790 psi | 81% | 2602 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 40,103 psi | 68% | 2493 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 39,508 psi | 67% | 2477 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,692 psi | 57% | 2385 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 35,375 psi | 60% | 2438 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,788 psi | 44% | 1453 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,116 psi | 65% | 2434 fps | 97.2% |
| IMR 3031 | <<locked>> | 80% | 38,566 psi | 66% | 2484 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,070 psi | 60% | 2352 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 48,878 psi | 83% | 2520 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 37,130 psi | 63% | 2477 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 35,926 psi | 61% | 2425 fps | 96.1% |
| IMR 8208 XBR | <<locked>> | 80% | 41,205 psi | 70% | 2480 fps | 98.6% |
| Lovex D073.5 | <<locked>> | 80% | 46,238 psi | 79% | 2562 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 37,710 psi | 64% | 2448 fps | 99.1% |
| Lovex S060 | <<locked>> | 80% | 39,885 psi | 68% | 2415 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 34,809 psi | 59% | 2362 fps | 97.1% |
| Lovex S065 | <<locked>> | 94% | 43,700 psi | 74% | 2536 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 38,406 psi | 65% | 2425 fps | 98% |
| Norma 202 | <<locked>> | 80% | 38,566 psi | 66% | 2441 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 34,505 psi | 59% | 2385 fps | 95.5% |
| Norma URP | <<locked>> | 94% | 39,030 psi | 66% | 2526 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 36,187 psi | 62% | 2441 fps | 95.8% |
| Ramshot TAC | <<locked>> | 82% | 43,801 psi | 75% | 2526 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 40,263 psi | 69% | 2493 fps | 97.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,527 psi | 76% | 2523 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 44% | 1490 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,267 psi | 79% | 2566 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 46,572 psi | 79% | 2585 fps | 95.1% |
| ReloadSwiss RS 52 | 46.4 gr | 80% | 36,260 psi | 62% | 2484 fps | 95.4% |
| ReloadSwiss RS 60 | 47.1 gr | 80% | 30,008 psi | 51% | 2346 fps | 96.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 41,176 psi | 70% | 2595 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,991 psi | 77% | 2664 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 42,351 psi | 72% | 2477 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 36,637 psi | 62% | 2379 fps | 97.6% |
| Rottweil R 903 | <<locked>> | 82% | 31,966 psi | 54% | 2329 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 43,700 psi | 74% | 2536 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 37,710 psi | 64% | 2448 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 34,809 psi | 59% | 2362 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,747 psi | 83% | 2579 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,462 psi | 60% | 2431 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,066 psi | 84% | 2572 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 41,887 psi | 71% | 2500 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,782 psi | 64% | 2434 fps | 96.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,147 psi | 68% | 2395 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,054 psi | 56% | 2267 fps | 99.3% |
| Somchem S321 | <<locked>> | 80% | 44,164 psi | 75% | 2552 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 39,508 psi | 67% | 2395 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 38,769 psi | 66% | 2444 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 33,069 psi | 56% | 2343 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 30,734 psi | 52% | 2369 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 45,513 psi | 77% | 2464 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,321 psi | 69% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 35,665 psi | 61% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 36,390 psi | 62% | 2379 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 29,414 psi | 50% | 2234 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 92% | 38,580 psi | 66% | 2480 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 41,147 psi | 70% | 2474 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 80% | 35,070 psi | 60% | 2365 fps | 99% |
| Vihtavuori N550 | <<locked>> | 94% | 40,118 psi | 68% | 2530 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,374 psi | 59% | 2362 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 40,161 psi | 68% | 2513 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 37,014 psi | 63% | 2438 fps | 97% |
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 86 powders for 8 x 64 loaded with the .321 | 180gr | Frontier PH HPFB. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,818 fps. Accurate 4350 gives the best case fill at 100 %, and 86 of the 86 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.321" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 with the .321 | 180gr | 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.