Load Specifications
Load data in caliber 8 x 65 RS with .323 | 220gr | A-Square MONO RN bullet and 97 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 50,140 psi | 85% | 2448 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,301 psi | 89% | 2500 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,918 psi | 75% | 2474 fps | 98.1% |
| Accurate 4064 | <<locked>> | 86% | 50,343 psi | 86% | 2493 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 49,821 psi | 85% | 2575 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 82% | 50,372 psi | 86% | 2516 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 51,387 psi | 87% | 2523 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,401 psi | 88% | 2605 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,562 psi | 89% | 2516 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,113 psi | 90% | 2677 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 51,532 psi | 88% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,025 psi | 89% | 2562 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,198 psi | 87% | 2631 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 51,895 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,546 psi | 86% | 2598 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,539 psi | 71% | 2497 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,622 psi | 62% | 2408 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,731 psi | 80% | 2657 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 49,719 psi | 85% | 2530 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 51,982 psi | 88% | 2556 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,025 psi | 89% | 2536 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 82% | 51,895 psi | 88% | 2546 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,794 psi | 90% | 2572 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 52,460 psi | 89% | 2625 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 90% | 49,777 psi | 85% | 2536 fps | 97.2% |
| Hodgdon H4895 | <<locked>> | 82% | 50,850 psi | 87% | 2526 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 50,908 psi | 87% | 2559 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 50,111 psi | 85% | 2559 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 52,417 psi | 89% | 2654 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,911 psi | 61% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,011 psi | 89% | 2530 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 50,995 psi | 87% | 2507 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 50,908 psi | 87% | 2507 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 50,531 psi | 86% | 2487 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 52,330 psi | 89% | 2562 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 50,734 psi | 86% | 2516 fps | 98.3% |
| IMR 4831 | <<locked>> | 96% | 50,357 psi | 86% | 2569 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 49,951 psi | 85% | 2539 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 52,562 psi | 89% | 2516 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 49,908 psi | 85% | 2493 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 52,997 psi | 90% | 2493 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 50,836 psi | 87% | 2503 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 50,140 psi | 85% | 2510 fps | 99.2% |
| Lovex S070 | <<locked>> | 94% | 50,836 psi | 87% | 2546 fps | 98.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,390 psi | 62% | 2336 fps | 96.2% |
| Norma 201 | <<locked>> | 84% | 52,460 psi | 89% | 2513 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,026 psi | 90% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,314 psi | 87% | 2552 fps | 100% |
| Norma 204 | <<locked>> | 96% | 52,562 psi | 89% | 2605 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 46,427 psi | 79% | 2612 fps | 97.7% |
| Norma URP | <<locked>> | 96% | 52,446 psi | 89% | 2615 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 86% | 51,459 psi | 88% | 2572 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 50,952 psi | 87% | 2612 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 52,446 psi | 89% | 2536 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,402 psi | 89% | 2556 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,448 psi | 62% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,982 psi | 90% | 2556 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,257 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 51,648 psi | 88% | 2651 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,823 psi | 90% | 2648 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,025 psi | 89% | 2671 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 86% | 53,127 psi | 90% | 2513 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 51,837 psi | 88% | 2549 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,211 psi | 84% | 2582 fps | 97% |
| Rottweil R 907 | <<locked>> | 92% | 52,025 psi | 89% | 2536 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 50,140 psi | 85% | 2510 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 49,908 psi | 85% | 2493 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 50,836 psi | 87% | 2503 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 50,836 psi | 87% | 2546 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 50,212 psi | 85% | 2562 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,169 psi | 87% | 2520 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 51,938 psi | 88% | 2539 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 50,676 psi | 86% | 2411 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,010 psi | 87% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 50,067 psi | 85% | 2470 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,733 psi | 83% | 2575 fps | 96.9% |
| Somchem S335 | <<locked>> | 82% | 50,111 psi | 85% | 2411 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 50,676 psi | 86% | 2510 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 52,214 psi | 89% | 2546 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 50,415 psi | 86% | 2615 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,879 psi | 85% | 2562 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 82% | 51,068 psi | 87% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 52,924 psi | 90% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 50,299 psi | 86% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 50,154 psi | 85% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 51,372 psi | 87% | 2562 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,178 psi | 74% | 2438 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 82% | 53,055 psi | 90% | 2516 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 51,605 psi | 88% | 2493 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 50,314 psi | 86% | 2569 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,108 psi | 78% | 2566 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 51,184 psi | 87% | 2539 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,069 psi | 90% | 2559 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 52,460 psi | 89% | 2625 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,347 psi | 64% | 2526 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 51,721 psi | 88% | 2546 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 46,949 psi | 80% | 2503 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 44,121 psi | 75% | 2362 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,946 psi | 73% | 2349 fps | 96% |
| Accurate 3100 | <<locked>> | 92% | 33,301 psi | 57% | 2274 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 41,742 psi | 71% | 2365 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,850 psi | 53% | 2224 fps | 96.2% |
| ADI AR 2206H | <<locked>> | 80% | 47,384 psi | 81% | 2470 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,176 psi | 68% | 2339 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 45,339 psi | 77% | 2507 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,443 psi | 84% | 2470 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,279 psi | 74% | 2516 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,176 psi | 68% | 2362 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,062 psi | 73% | 2421 fps | 99.5% |
| Alliant Reloder-16 | 47.8 gr | 80% | 31,169 psi | 53% | 2238 fps | 96.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,679 psi | 59% | 2349 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 96% | 44,483 psi | 76% | 2497 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,498 psi | 43% | 2110 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,519 psi | 59% | 2359 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,734 psi | 52% | 2313 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,601 psi | 79% | 2480 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 39,900 psi | 68% | 2369 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,669 psi | 69% | 2346 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,559 psi | 83% | 2500 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,495 psi | 69% | 2372 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 84% | 37,753 psi | 64% | 2372 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 41,162 psi | 70% | 2388 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 47,834 psi | 81% | 2480 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,689 psi | 49% | 2146 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,990 psi | 75% | 2464 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 39,653 psi | 68% | 2431 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 45% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,759 psi | 78% | 2434 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,747 psi | 81% | 2464 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,221 psi | 72% | 2365 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,759 psi | 76% | 2392 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 38,421 psi | 65% | 2326 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,333 psi | 64% | 2277 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 30,081 psi | 51% | 2192 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 44,092 psi | 75% | 2448 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 49,443 psi | 84% | 2470 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,876 psi | 80% | 2451 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,963 psi | 80% | 2408 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 42,206 psi | 72% | 2369 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,795 psi | 59% | 2234 fps | 95.9% |
| Lovex S070 | <<locked>> | 84% | 37,434 psi | 64% | 2310 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 34,229 psi | 58% | 2293 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 46,369 psi | 79% | 2425 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,804 psi | 80% | 2425 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,409 psi | 72% | 2411 fps | 99.7% |
| Norma 204 | <<locked>> | 92% | 46,064 psi | 78% | 2503 fps | 95.7% |
| Norma MRP | <<locked>> | 94% | 38,087 psi | 65% | 2451 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 31,125 psi | 53% | 2224 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 42,061 psi | 72% | 2425 fps | 99.6% |
| Ramshot Hunter | 53.2 gr | 84% | 34,577 psi | 59% | 2310 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 49,211 psi | 84% | 2487 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,863 psi | 83% | 2503 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 46% | 1421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,002 psi | 70% | 2359 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,687 psi | 78% | 2520 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,941 psi | 63% | 2405 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,501 psi | 52% | 2238 fps | 95.6% |
| ReloadSwiss RS 70 | 53.6 gr | 82% | 32,634 psi | 56% | 2293 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 44,135 psi | 75% | 2382 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,507 psi | 64% | 2316 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 96% | 43,294 psi | 74% | 2480 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 84% | 40,669 psi | 69% | 2346 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,795 psi | 59% | 2234 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,876 psi | 80% | 2451 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,206 psi | 72% | 2369 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 37,434 psi | 64% | 2310 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,522 psi | 66% | 2365 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,892 psi | 82% | 2470 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,803 psi | 78% | 2448 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,572 psi | 81% | 2369 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,784 psi | 68% | 2254 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,230 psi | 62% | 2231 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 42,902 psi | 73% | 2477 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 47,181 psi | 80% | 2369 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,413 psi | 81% | 2461 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 38,305 psi | 65% | 2320 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,949 psi | 48% | 2185 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 38,580 psi | 66% | 2369 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 47,993 psi | 82% | 2356 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,874 psi | 75% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,193 psi | 75% | 2365 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,347 psi | 62% | 2260 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 32,547 psi | 55% | 2228 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 40,321 psi | 69% | 2388 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 49,545 psi | 84% | 2467 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,540 psi | 72% | 2362 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,937 psi | 54% | 2228 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 27,296 psi | 46% | 2178 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,097 psi | 55% | 2205 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 49,632 psi | 84% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 37,753 psi | 64% | 2372 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,527 psi | 43% | 2182 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,513 psi | 77% | 2454 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 43,743 psi | 74% | 2451 fps | 95.1% |
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 113 powders for 8 x 65 RS loaded with the .323 | 220gr | A-Square MONO RN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 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 220.0 gr projectile in 0.323" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for 8 x 65 RS with the .323 | 220gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.