Load Specifications
Load data in caliber 8 x 60 S with .323 | 200gr | Peregrine VRG-3 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.
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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% | 50,560 psi | 86% | 2467 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,967 psi | 88% | 2526 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 50,676 psi | 86% | 2520 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 50,169 psi | 85% | 2539 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 50,676 psi | 86% | 2559 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,354 psi | 79% | 2562 fps | 98% |
| ADI AR 2206H | <<locked>> | 90% | 52,837 psi | 90% | 2592 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 94% | 50,676 psi | 86% | 2543 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 52,199 psi | 89% | 2552 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 51,837 psi | 88% | 2533 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 50,154 psi | 85% | 2595 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 52,199 psi | 89% | 2694 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 52,910 psi | 90% | 2605 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 50,517 psi | 86% | 2470 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 50,560 psi | 86% | 2579 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,108 psi | 78% | 2569 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 49,980 psi | 85% | 2661 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 52,591 psi | 90% | 2457 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,359 psi | 89% | 2602 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 52,997 psi | 90% | 2618 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 51,198 psi | 87% | 2497 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 50,618 psi | 86% | 2575 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,431 psi | 89% | 2661 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 53,011 psi | 90% | 2552 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 50,299 psi | 86% | 2530 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 51,285 psi | 87% | 2579 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,082 psi | 85% | 2615 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 50,009 psi | 85% | 2552 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,293 psi | 72% | 2464 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 51,866 psi | 88% | 2628 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,577 psi | 59% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 51,343 psi | 87% | 2556 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 52,460 psi | 89% | 2585 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 50,038 psi | 85% | 2526 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 90% | 50,821 psi | 87% | 2507 fps | 95.9% |
| IMR 4198 | <<locked>> | 82% | 51,242 psi | 87% | 2438 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 52,982 psi | 90% | 2569 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,208 psi | 75% | 2510 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 51,808 psi | 88% | 2608 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 52,199 psi | 89% | 2552 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 52,011 psi | 89% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 51,677 psi | 88% | 2569 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 50,082 psi | 85% | 2484 fps | 99.3% |
| Lovex S062 | <<locked>> | 94% | 52,634 psi | 90% | 2572 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,677 psi | 88% | 2559 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,994 psi | 83% | 2539 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 51,358 psi | 87% | 2539 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 51,953 psi | 88% | 2549 fps | 100% |
| Norma 203B | <<locked>> | 94% | 52,982 psi | 90% | 2615 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 46,412 psi | 79% | 2559 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 92% | 49,951 psi | 85% | 2592 fps | 99.3% |
| Ramshot TAC | <<locked>> | 88% | 52,707 psi | 90% | 2566 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 88% | 51,721 psi | 88% | 2582 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,980 psi | 85% | 2507 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 60% | 1585 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 51,808 psi | 88% | 2536 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,880 psi | 88% | 2562 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 50,183 psi | 85% | 2635 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 49,806 psi | 85% | 2664 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,137 psi | 79% | 2582 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,195 psi | 80% | 2602 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 88% | 52,431 psi | 89% | 2530 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 51,880 psi | 88% | 2539 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 52,852 psi | 90% | 2608 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,677 psi | 88% | 2559 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 51,677 psi | 88% | 2569 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 52,634 psi | 90% | 2572 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,994 psi | 83% | 2539 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 51,430 psi | 88% | 2507 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 51,503 psi | 88% | 2621 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 51,561 psi | 88% | 2490 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 50,415 psi | 86% | 2536 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 51,227 psi | 87% | 2566 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 50,575 psi | 86% | 2454 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 50,183 psi | 85% | 2451 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,214 psi | 89% | 2516 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 49,676 psi | 85% | 2533 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 52,605 psi | 90% | 2493 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 50,198 psi | 85% | 2536 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 50,169 psi | 85% | 2559 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,249 psi | 70% | 2510 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 50,459 psi | 86% | 2425 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 50,662 psi | 86% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 51,213 psi | 87% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 52,330 psi | 89% | 2530 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 51,793 psi | 88% | 2546 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,052 psi | 84% | 2562 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 88% | 52,547 psi | 89% | 2549 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 50,633 psi | 86% | 2526 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,703 psi | 81% | 2559 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,024 psi | 85% | 2549 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 51,677 psi | 88% | 2592 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,082 psi | 85% | 2615 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 50,850 psi | 87% | 2572 fps | 99.7% |
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% | 41,684 psi | 71% | 2336 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,310 psi | 77% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,866 psi | 58% | 2254 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,553 psi | 69% | 2388 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 32,082 psi | 55% | 2238 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 37,333 psi | 64% | 2405 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 38,334 psi | 65% | 2346 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 34,838 psi | 59% | 2257 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,408 psi | 69% | 2362 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 39,610 psi | 67% | 2362 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,891 psi | 80% | 2543 fps | 99.4% |
| Alliant Power Pro 2000-MR | 47.7 gr | 82% | 36,941 psi | 63% | 2405 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,662 psi | 54% | 2224 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,558 psi | 81% | 2431 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,200 psi | 58% | 2280 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,172 psi | 62% | 2369 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,373 psi | 57% | 2333 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,545 psi | 84% | 2415 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,434 psi | 64% | 2346 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 30,806 psi | 52% | 2221 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,656 psi | 73% | 2362 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,566 psi | 66% | 2375 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,525 psi | 72% | 2500 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 46,383 psi | 79% | 2461 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,905 psi | 80% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 39,160 psi | 67% | 2375 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 98% | 46,920 psi | 80% | 2562 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,595 psi | 66% | 2356 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,692 psi | 56% | 2267 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,650 psi | 59% | 2323 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,585 psi | 44% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,362 psi | 64% | 2316 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 37,826 psi | 64% | 2365 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,171 psi | 58% | 2238 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,674 psi | 81% | 2457 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 48,225 psi | 82% | 2395 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 49,777 psi | 85% | 2520 fps | 95.6% |
| IMR 4831 | <<locked>> | 94% | 36,143 psi | 62% | 2362 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 35,012 psi | 60% | 2310 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 40,408 psi | 69% | 2362 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 45,136 psi | 77% | 2438 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 36,724 psi | 63% | 2329 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 39,102 psi | 67% | 2297 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 33,750 psi | 57% | 2241 fps | 97.3% |
| Lovex S065 | <<locked>> | 94% | 42,902 psi | 73% | 2418 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 45,963 psi | 78% | 2490 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 37,536 psi | 64% | 2306 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 37,637 psi | 64% | 2320 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 33,576 psi | 57% | 2270 fps | 95.8% |
| Norma URP | <<locked>> | 94% | 38,101 psi | 65% | 2408 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 33,141 psi | 56% | 2277 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 40,234 psi | 68% | 2356 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,407 psi | 67% | 2375 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,918 psi | 75% | 2408 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,788 psi | 44% | 1411 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,542 psi | 78% | 2441 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,701 psi | 78% | 2464 fps | 95.5% |
| ReloadSwiss RS 52 | 45.2 gr | 80% | 35,462 psi | 60% | 2365 fps | 95.8% |
| ReloadSwiss RS 60 | 45.9 gr | 80% | 29,240 psi | 50% | 2238 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,376 psi | 64% | 2418 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,278 psi | 70% | 2490 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 41,017 psi | 70% | 2349 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,737 psi | 61% | 2264 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 30,922 psi | 53% | 2215 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,902 psi | 73% | 2418 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,724 psi | 63% | 2329 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 33,750 psi | 57% | 2241 fps | 97.3% |
| Shooters World SW4350 | <<locked>> | 98% | 45,963 psi | 78% | 2490 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,182 psi | 82% | 2461 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,460 psi | 55% | 2267 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,196 psi | 82% | 2444 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,145 psi | 65% | 2326 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,057 psi | 63% | 2320 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,189 psi | 67% | 2277 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,155 psi | 55% | 2152 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,747 psi | 83% | 2467 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 43,497 psi | 74% | 2438 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 38,754 psi | 66% | 2283 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,101 psi | 65% | 2333 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 30,211 psi | 51% | 2182 fps | 95% |
| Somchem S365 | <<locked>> | 88% | 27,862 psi | 47% | 2201 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 44,527 psi | 76% | 2343 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,392 psi | 67% | 2277 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,577 psi | 59% | 2257 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,708 psi | 61% | 2264 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 28,660 psi | 49% | 2129 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 37,637 psi | 64% | 2362 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 40,364 psi | 69% | 2356 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 80% | 34,200 psi | 58% | 2251 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 94% | 39,204 psi | 67% | 2411 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,401 psi | 53% | 2198 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 39,450 psi | 67% | 2395 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 46,920 psi | 80% | 2562 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,056 psi | 61% | 2320 fps | 97.3% |
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 107 powders for 8 x 60 S loaded with the .323 | 200gr | Peregrine VRG-3. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,694 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,694 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 49–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.323" calls for a 1:14.0 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 8 x 60 S with the .323 | 200gr | Peregrine VRG-3 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-26, Hodgdon H4350, IMR 4350 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.