Load Specifications
Load data in caliber 7.62 x 53 R Fin. with .308 | 180gr | Swift Scirocco 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: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 49,516 psi | 88% | 2533 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 50,850 psi | 90% | 2595 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 49,647 psi | 88% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 48,733 psi | 86% | 2605 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,284 psi | 87% | 2625 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,715 psi | 79% | 2631 fps | 98% |
| ADI AR 2206H | <<locked>> | 88% | 48,414 psi | 86% | 2612 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 94% | 49,342 psi | 87% | 2608 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 50,894 psi | 90% | 2618 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 50,386 psi | 89% | 2598 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 48,733 psi | 86% | 2661 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 50,560 psi | 89% | 2759 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,385 psi | 86% | 2628 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,501 psi | 88% | 2536 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 48,965 psi | 87% | 2644 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,947 psi | 79% | 2638 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,269 psi | 85% | 2726 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 50,807 psi | 90% | 2667 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 48,167 psi | 85% | 2638 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 50,140 psi | 89% | 2562 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,298 psi | 87% | 2644 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 50,821 psi | 90% | 2730 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 82% | 48,211 psi | 85% | 2569 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 48,994 psi | 87% | 2595 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 49,705 psi | 88% | 2644 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,298 psi | 85% | 2674 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 48,776 psi | 86% | 2621 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,176 psi | 73% | 2530 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 50,009 psi | 88% | 2694 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 61% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 49,966 psi | 88% | 2625 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 51,039 psi | 90% | 2657 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 48,704 psi | 86% | 2589 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,559 psi | 88% | 2569 fps | 96% |
| IMR 4198 | <<locked>> | 82% | 50,024 psi | 88% | 2500 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 48,472 psi | 86% | 2585 fps | 95.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,670 psi | 75% | 2575 fps | 97.7% |
| IMR 4895 | <<locked>> | 92% | 50,140 psi | 89% | 2674 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 50,894 psi | 90% | 2618 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 50,589 psi | 89% | 2602 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 50,183 psi | 89% | 2635 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 48,849 psi | 86% | 2546 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 48,153 psi | 85% | 2592 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,256 psi | 89% | 2625 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,456 psi | 84% | 2602 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 50,314 psi | 89% | 2608 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 50,401 psi | 89% | 2615 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,138 psi | 85% | 2631 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 44,759 psi | 79% | 2621 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 92% | 48,283 psi | 85% | 2654 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,483 psi | 79% | 2615 fps | 95.9% |
| Ramshot TAC | <<locked>> | 86% | 48,037 psi | 85% | 2579 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 50,111 psi | 89% | 2648 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 48,849 psi | 86% | 2572 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,867 psi | 62% | 1624 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 50,502 psi | 89% | 2602 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 50,676 psi | 90% | 2628 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,399 psi | 86% | 2700 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,341 psi | 85% | 2736 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,469 psi | 79% | 2648 fps | 97.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 45,992 psi | 81% | 2667 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 86% | 48,631 psi | 86% | 2552 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 50,575 psi | 89% | 2605 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 48,051 psi | 85% | 2628 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,256 psi | 89% | 2625 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 50,183 psi | 89% | 2635 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,153 psi | 85% | 2592 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,456 psi | 84% | 2602 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 50,415 psi | 89% | 2572 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 49,676 psi | 88% | 2684 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 50,343 psi | 89% | 2556 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,052 psi | 87% | 2602 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 49,806 psi | 88% | 2631 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,269 psi | 87% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 48,762 psi | 86% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,589 psi | 89% | 2582 fps | 96.3% |
| Somchem S321 | <<locked>> | 84% | 48,573 psi | 86% | 2605 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 48,399 psi | 86% | 2513 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,733 psi | 86% | 2602 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 49,008 psi | 87% | 2631 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,929 psi | 71% | 2575 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 49,458 psi | 87% | 2490 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,255 psi | 87% | 2503 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,661 psi | 88% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 51,111 psi | 90% | 2595 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 50,343 psi | 89% | 2615 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,456 psi | 84% | 2625 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 86% | 48,167 psi | 85% | 2572 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 49,095 psi | 87% | 2592 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,195 psi | 82% | 2628 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,631 psi | 86% | 2615 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 50,270 psi | 89% | 2661 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 48,602 psi | 86% | 2680 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 49,327 psi | 87% | 2641 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 41,147 psi | 73% | 2408 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,411 psi | 79% | 2500 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,489 psi | 59% | 2326 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 39,697 psi | 70% | 2461 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 31,676 psi | 56% | 2313 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 33,634 psi | 59% | 2418 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 37,710 psi | 67% | 2418 fps | 97.5% |
| ADI AR 2208 | <<locked>> | 82% | 34,229 psi | 61% | 2326 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,726 psi | 70% | 2431 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 38,551 psi | 68% | 2428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,876 psi | 81% | 2615 fps | 99.4% |
| Alliant Power Pro 2000-MR | 42.8 gr | 82% | 36,289 psi | 64% | 2480 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,966 psi | 55% | 2297 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,615 psi | 82% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,678 psi | 60% | 2352 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,418 psi | 63% | 2438 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,574 psi | 54% | 2349 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,347 psi | 64% | 2411 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 30,298 psi | 54% | 2297 fps | 96.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,843 psi | 74% | 2428 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,565 psi | 66% | 2444 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,249 psi | 73% | 2566 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 45,049 psi | 80% | 2523 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,658 psi | 81% | 2546 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 35,868 psi | 63% | 2395 fps | 95% |
| Hodgdon H414 | <<locked>> | 98% | 45,295 psi | 80% | 2625 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 37,985 psi | 67% | 2431 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,153 psi | 53% | 2287 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,837 psi | 60% | 2395 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 45% | 1417 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,434 psi | 64% | 2382 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 36,622 psi | 65% | 2428 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,591 psi | 59% | 2306 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,557 psi | 82% | 2520 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 47,123 psi | 83% | 2457 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 45,774 psi | 81% | 2539 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 35,244 psi | 62% | 2431 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 34,432 psi | 61% | 2382 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 39,726 psi | 70% | 2431 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 44,164 psi | 78% | 2507 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 35,984 psi | 64% | 2402 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 38,479 psi | 68% | 2365 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 33,315 psi | 59% | 2316 fps | 97.6% |
| Lovex S065 | <<locked>> | 92% | 39,479 psi | 70% | 2441 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 44,788 psi | 79% | 2556 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 36,912 psi | 65% | 2375 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 36,854 psi | 65% | 2388 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,069 psi | 58% | 2346 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 35,012 psi | 62% | 2428 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 32,387 psi | 57% | 2346 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 98% | 41,495 psi | 73% | 2559 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 39,421 psi | 70% | 2425 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,392 psi | 68% | 2444 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,888 psi | 76% | 2474 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 46% | 1453 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,382 psi | 78% | 2507 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,353 psi | 78% | 2526 fps | 95.6% |
| ReloadSwiss RS 52 | 40.4 gr | 80% | 34,418 psi | 61% | 2434 fps | 96% |
| ReloadSwiss RS 60 | 41.1 gr | 80% | 28,761 psi | 51% | 2310 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,361 psi | 64% | 2490 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,234 psi | 71% | 2556 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 40,654 psi | 72% | 2421 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,259 psi | 62% | 2336 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 28,442 psi | 50% | 2241 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 39,479 psi | 70% | 2441 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,984 psi | 64% | 2402 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 33,315 psi | 59% | 2316 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 98% | 44,788 psi | 79% | 2556 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,949 psi | 83% | 2523 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,879 psi | 56% | 2339 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,050 psi | 83% | 2507 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,362 psi | 66% | 2395 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,056 psi | 64% | 2385 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,580 psi | 68% | 2343 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,589 psi | 56% | 2221 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,224 psi | 83% | 2533 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 42,264 psi | 75% | 2500 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,058 psi | 67% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 36,985 psi | 65% | 2395 fps | 97.2% |
| Somchem S355 | <<locked>> | 80% | 29,689 psi | 52% | 2254 fps | 95.4% |
| Somchem S365 | <<locked>> | 88% | 27,383 psi | 48% | 2274 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 43,729 psi | 77% | 2408 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,609 psi | 68% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,895 psi | 60% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,809 psi | 62% | 2329 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 28,021 psi | 50% | 2195 fps | 96.4% |
| Vihtavuori N160 | <<locked>> | 92% | 36,593 psi | 65% | 2425 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 39,537 psi | 70% | 2425 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 33,489 psi | 59% | 2320 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 35,708 psi | 63% | 2431 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,806 psi | 54% | 2264 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 38,348 psi | 68% | 2464 fps | 99.4% |
| Winchester 760 | <<locked>> | 98% | 45,556 psi | 81% | 2628 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,244 psi | 62% | 2388 fps | 97.5% |
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 7.62 x 53 R Fin. loaded with the .308 | 180gr | Swift Scirocco. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,759 fps. Accurate 3100 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 (390 MPa), the top charges use 50–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.308" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 7.62 x 53 R Fin. with the .308 | 180gr | Swift Scirocco they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 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.