Load Specifications
Load data in caliber 8 x 64 S with .323 | 200gr | Barnes TSX BT bullet and 94 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.
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>> | 86% | 50,212 psi | 85% | 2457 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,605 psi | 88% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 50,285 psi | 86% | 2510 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 49,835 psi | 85% | 2533 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 50,299 psi | 86% | 2549 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,759 psi | 78% | 2549 fps | 97.8% |
| ADI AR 2206H | <<locked>> | 90% | 52,518 psi | 89% | 2582 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 50,386 psi | 86% | 2536 fps | 98.9% |
| ADI Benchmark 8208 | <<locked>> | 88% | 51,866 psi | 88% | 2543 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 51,750 psi | 88% | 2526 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,777 psi | 85% | 2582 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 51,648 psi | 88% | 2680 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 52,605 psi | 90% | 2598 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 50,096 psi | 85% | 2461 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 50,256 psi | 86% | 2569 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,890 psi | 78% | 2562 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,487 psi | 84% | 2648 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 52,344 psi | 89% | 2448 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,098 psi | 89% | 2595 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 52,678 psi | 90% | 2608 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 50,879 psi | 87% | 2487 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 50,328 psi | 86% | 2566 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,112 psi | 89% | 2651 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 84% | 52,605 psi | 90% | 2543 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 50,024 psi | 85% | 2520 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 51,010 psi | 87% | 2572 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 49,545 psi | 84% | 2602 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 52,953 psi | 90% | 2595 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,076 psi | 72% | 2454 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 51,517 psi | 88% | 2621 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,577 psi | 59% | 1542 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 51,039 psi | 87% | 2549 fps | 99.6% |
| IMR 3031 | <<locked>> | 90% | 52,112 psi | 89% | 2579 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,084 psi | 90% | 2566 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,546 psi | 86% | 2497 fps | 95.8% |
| IMR 4198 | <<locked>> | 82% | 50,836 psi | 87% | 2428 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,750 psi | 90% | 2562 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,961 psi | 75% | 2503 fps | 97.5% |
| IMR 4895 | <<locked>> | 92% | 51,488 psi | 88% | 2598 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 51,866 psi | 88% | 2543 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 51,677 psi | 88% | 2530 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 51,343 psi | 87% | 2562 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 52,982 psi | 90% | 2523 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 52,315 psi | 89% | 2562 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,126 psi | 87% | 2549 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,472 psi | 83% | 2526 fps | 95.7% |
| Norma 201 | <<locked>> | 90% | 51,010 psi | 87% | 2533 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 51,605 psi | 88% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 94% | 52,692 psi | 90% | 2608 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 45,876 psi | 78% | 2546 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 94% | 53,011 psi | 90% | 2631 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 52,431 psi | 89% | 2556 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 51,445 psi | 88% | 2572 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,156 psi | 90% | 2546 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 60% | 1581 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 51,503 psi | 88% | 2530 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,619 psi | 88% | 2552 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 49,835 psi | 85% | 2625 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 52,953 psi | 90% | 2707 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 45,614 psi | 78% | 2569 fps | 97.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,021 psi | 80% | 2592 fps | 97% |
| Rottweil R 901 | <<locked>> | 88% | 52,069 psi | 89% | 2520 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 51,547 psi | 88% | 2530 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 52,576 psi | 90% | 2598 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,126 psi | 87% | 2549 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 51,343 psi | 87% | 2562 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 52,315 psi | 89% | 2562 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,472 psi | 83% | 2526 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 51,387 psi | 87% | 2503 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 51,227 psi | 87% | 2612 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 51,140 psi | 87% | 2480 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 50,140 psi | 85% | 2530 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 50,952 psi | 87% | 2556 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 50,183 psi | 85% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 52,953 psi | 90% | 2484 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 51,561 psi | 88% | 2503 fps | 96% |
| Somchem S321 | <<locked>> | 86% | 52,924 psi | 90% | 2575 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 52,301 psi | 89% | 2484 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 49,617 psi | 84% | 2523 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 49,879 psi | 85% | 2552 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,770 psi | 69% | 2497 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 84% | 50,357 psi | 86% | 2421 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 50,285 psi | 86% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 50,821 psi | 87% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 52,011 psi | 89% | 2520 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 51,532 psi | 88% | 2539 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,515 psi | 83% | 2549 fps | 98.1% |
| Vihtavuori N530 | <<locked>> | 88% | 52,214 psi | 89% | 2543 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 50,299 psi | 86% | 2520 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,471 psi | 81% | 2552 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,821 psi | 85% | 2543 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 51,358 psi | 87% | 2585 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,864 psi | 85% | 2605 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 50,575 psi | 86% | 2566 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% | 41,597 psi | 71% | 2333 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,991 psi | 77% | 2425 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,533 psi | 57% | 2244 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,248 psi | 69% | 2382 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 31,763 psi | 54% | 2228 fps | 99.1% |
| Accurate 4350 | <<locked>> | 94% | 37,072 psi | 63% | 2395 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 38,247 psi | 65% | 2339 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 34,563 psi | 59% | 2247 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,350 psi | 69% | 2356 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 39,233 psi | 67% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,789 psi | 80% | 2536 fps | 99.3% |
| Alliant Power Pro 2000-MR | 47.5 gr | 82% | 36,898 psi | 63% | 2398 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,575 psi | 54% | 2221 fps | 96.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,181 psi | 80% | 2421 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,113 psi | 58% | 2274 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 38,087 psi | 65% | 2408 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,170 psi | 56% | 2326 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,240 psi | 84% | 2408 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,144 psi | 63% | 2336 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 30,501 psi | 52% | 2208 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,337 psi | 72% | 2352 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,261 psi | 65% | 2365 fps | 98.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,206 psi | 72% | 2490 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 46,021 psi | 78% | 2451 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,615 psi | 79% | 2470 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 38,870 psi | 66% | 2365 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 46,412 psi | 79% | 2549 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 38,551 psi | 66% | 2352 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,663 psi | 56% | 2264 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,374 psi | 59% | 2316 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 43% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,072 psi | 63% | 2306 fps | 97.3% |
| IMR 3031 | <<locked>> | 80% | 37,478 psi | 64% | 2356 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,084 psi | 58% | 2234 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,427 psi | 81% | 2448 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 48,080 psi | 82% | 2392 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,530 psi | 84% | 2513 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 35,897 psi | 61% | 2352 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 34,882 psi | 59% | 2303 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 80% | 40,350 psi | 69% | 2356 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 44,788 psi | 76% | 2428 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 36,390 psi | 62% | 2320 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 39,015 psi | 66% | 2293 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 33,649 psi | 57% | 2238 fps | 97.2% |
| Lovex S065 | <<locked>> | 94% | 42,641 psi | 73% | 2411 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 45,672 psi | 78% | 2480 fps | 95% |
| Norma 201 | <<locked>> | 80% | 37,231 psi | 63% | 2297 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 37,536 psi | 64% | 2316 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 33,489 psi | 57% | 2264 fps | 95.7% |
| Norma URP | <<locked>> | 94% | 37,826 psi | 64% | 2398 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 32,924 psi | 56% | 2270 fps | 95.1% |
| Ramshot TAC | <<locked>> | 82% | 42,801 psi | 73% | 2398 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,102 psi | 67% | 2369 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,613 psi | 74% | 2398 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 44% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,194 psi | 77% | 2434 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,455 psi | 77% | 2457 fps | 95.4% |
| ReloadSwiss RS 52 | 44.9 gr | 80% | 35,157 psi | 60% | 2356 fps | 95.6% |
| ReloadSwiss RS 60 | 45.6 gr | 80% | 29,037 psi | 49% | 2228 fps | 96.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,173 psi | 63% | 2411 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,075 psi | 70% | 2480 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 40,915 psi | 70% | 2346 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 35,389 psi | 60% | 2254 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 30,821 psi | 52% | 2211 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,641 psi | 73% | 2411 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,390 psi | 62% | 2320 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 33,649 psi | 57% | 2238 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 45,672 psi | 78% | 2480 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,834 psi | 81% | 2451 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,374 psi | 59% | 2306 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,066 psi | 82% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 40,683 psi | 69% | 2372 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,796 psi | 63% | 2313 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,102 psi | 67% | 2270 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,053 psi | 55% | 2149 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,443 psi | 82% | 2461 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 43,163 psi | 73% | 2428 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 38,464 psi | 65% | 2274 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 37,811 psi | 64% | 2326 fps | 96.9% |
| Somchem S355 | <<locked>> | 82% | 32,010 psi | 54% | 2221 fps | 95.7% |
| Somchem S365 | <<locked>> | 90% | 29,515 psi | 50% | 2244 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 44,454 psi | 76% | 2339 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,291 psi | 67% | 2274 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,447 psi | 59% | 2251 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,433 psi | 60% | 2257 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 28,369 psi | 48% | 2119 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 92% | 37,391 psi | 64% | 2352 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 40,030 psi | 68% | 2349 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 33,939 psi | 58% | 2241 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 94% | 38,986 psi | 66% | 2405 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,227 psi | 53% | 2192 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,146 psi | 67% | 2388 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 46,717 psi | 80% | 2556 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,795 psi | 61% | 2310 fps | 97.1% |
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 | 200gr | Barnes TSX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,542 fps to 2,707 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 59–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.323" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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 | 200gr | Barnes TSX BT 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.