Load Specifications
Load data in caliber 7.62 x 53 R Fin. with .308 | 174gr | Prvi Partizan FMJ BT bullet and 93 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: 27"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 49,705 psi | 88% | 2592 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,111 psi | 90% | 2657 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 49,879 psi | 88% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 49,139 psi | 87% | 2671 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 49,705 psi | 88% | 2690 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 45,005 psi | 80% | 2690 fps | 98% |
| ADI AR 2206H | <<locked>> | 88% | 48,631 psi | 86% | 2674 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 94% | 49,690 psi | 88% | 2674 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 88% | 51,155 psi | 90% | 2680 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 50,778 psi | 90% | 2664 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 49,313 psi | 87% | 2730 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 50,923 psi | 90% | 2825 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 48,776 psi | 86% | 2694 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 49,661 psi | 88% | 2598 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 49,327 psi | 87% | 2707 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 45,310 psi | 80% | 2700 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 48,733 psi | 86% | 2795 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 47,892 psi | 85% | 2684 fps | 98.5% |
| Bofors RP3 | <<locked>> | 94% | 48,733 psi | 86% | 2703 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 50,198 psi | 89% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 49,603 psi | 88% | 2707 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 51,068 psi | 90% | 2795 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 48,414 psi | 86% | 2635 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 49,255 psi | 87% | 2657 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 50,212 psi | 89% | 2713 fps | 98.3% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 48,747 psi | 86% | 2743 fps | 96% |
| Hodgdon H4895 | <<locked>> | 88% | 48,994 psi | 87% | 2687 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,263 psi | 73% | 2585 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 50,560 psi | 89% | 2762 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,679 psi | 61% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 50,415 psi | 89% | 2690 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 48,109 psi | 85% | 2677 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 49,168 psi | 87% | 2657 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,908 psi | 88% | 2631 fps | 95.9% |
| IMR 4198 | <<locked>> | 82% | 50,357 psi | 89% | 2562 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 43,236 psi | 76% | 2641 fps | 97.7% |
| IMR 4895 | <<locked>> | 92% | 50,517 psi | 89% | 2740 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 51,155 psi | 90% | 2680 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 51,039 psi | 90% | 2667 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 50,560 psi | 89% | 2700 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 49,182 psi | 87% | 2612 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 48,631 psi | 86% | 2657 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,618 psi | 89% | 2687 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 47,790 psi | 84% | 2664 fps | 95.9% |
| Norma 201 | <<locked>> | 90% | 50,531 psi | 89% | 2674 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 50,966 psi | 90% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 92% | 48,501 psi | 86% | 2697 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 45,121 psi | 80% | 2687 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 92% | 48,660 psi | 86% | 2720 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 44,875 psi | 79% | 2680 fps | 95.9% |
| Ramshot TAC | <<locked>> | 86% | 48,298 psi | 85% | 2641 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 88% | 50,691 psi | 90% | 2717 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 49,284 psi | 87% | 2638 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,911 psi | 62% | 1670 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 50,792 psi | 90% | 2667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,039 psi | 90% | 2694 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 48,805 psi | 86% | 2766 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 48,878 psi | 86% | 2805 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,846 psi | 79% | 2710 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,253 psi | 82% | 2733 fps | 97.1% |
| Rottweil R 901 | <<locked>> | 86% | 48,849 psi | 86% | 2618 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 51,082 psi | 90% | 2671 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 48,312 psi | 85% | 2690 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,618 psi | 89% | 2687 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 50,560 psi | 89% | 2700 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 48,631 psi | 86% | 2657 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 47,790 psi | 84% | 2664 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 50,662 psi | 90% | 2638 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 50,314 psi | 89% | 2753 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 50,430 psi | 89% | 2618 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 49,588 psi | 88% | 2667 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 50,125 psi | 89% | 2697 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 49,719 psi | 88% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 49,240 psi | 87% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 50,850 psi | 90% | 2641 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 48,689 psi | 86% | 2664 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 48,718 psi | 86% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 48,921 psi | 86% | 2661 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 49,269 psi | 87% | 2694 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 40,234 psi | 71% | 2638 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 49,806 psi | 88% | 2552 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 49,690 psi | 88% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 49,966 psi | 88% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 51,184 psi | 90% | 2657 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 50,444 psi | 89% | 2674 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,747 psi | 84% | 2687 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 86% | 48,414 psi | 86% | 2635 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 49,647 psi | 88% | 2657 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,688 psi | 83% | 2694 fps | 97.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 49,081 psi | 87% | 2677 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 50,633 psi | 90% | 2726 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 49,081 psi | 87% | 2746 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 90% | 49,588 psi | 88% | 2703 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% | 41,336 psi | 73% | 2464 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 44,788 psi | 79% | 2562 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,837 psi | 60% | 2385 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,103 psi | 71% | 2523 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 31,995 psi | 57% | 2372 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 33,968 psi | 60% | 2477 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 37,971 psi | 67% | 2480 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 34,476 psi | 61% | 2385 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,987 psi | 71% | 2490 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 38,725 psi | 68% | 2487 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,209 psi | 82% | 2677 fps | 99.4% |
| Alliant Power Pro 2000-MR | 44.3 gr | 82% | 36,463 psi | 64% | 2539 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,241 psi | 55% | 2352 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,847 psi | 83% | 2559 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,924 psi | 60% | 2411 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 35,534 psi | 63% | 2493 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 30,937 psi | 55% | 2411 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 36,608 psi | 65% | 2470 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 30,501 psi | 54% | 2349 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,872 psi | 74% | 2484 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,855 psi | 67% | 2507 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,539 psi | 73% | 2628 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 45,368 psi | 80% | 2589 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,963 psi | 81% | 2608 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 38,740 psi | 68% | 2507 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 45,788 psi | 81% | 2690 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 38,261 psi | 68% | 2490 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,371 psi | 54% | 2343 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,142 psi | 60% | 2454 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,802 psi | 46% | 1457 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,680 psi | 65% | 2444 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 37,028 psi | 65% | 2490 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,895 psi | 60% | 2365 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 46,963 psi | 83% | 2582 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 47,514 psi | 84% | 2523 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 35,476 psi | 63% | 2487 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,693 psi | 61% | 2441 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 80% | 39,987 psi | 71% | 2490 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 44,498 psi | 79% | 2569 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 36,143 psi | 64% | 2457 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 38,769 psi | 69% | 2425 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 33,620 psi | 59% | 2375 fps | 97.6% |
| Lovex S065 | <<locked>> | 94% | 42,105 psi | 74% | 2546 fps | 95.7% |
| Lovex S070 | <<locked>> | 98% | 44,947 psi | 79% | 2615 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 37,217 psi | 66% | 2438 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 37,188 psi | 66% | 2451 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 33,330 psi | 59% | 2402 fps | 96.1% |
| Norma URP | <<locked>> | 92% | 35,070 psi | 62% | 2484 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 32,663 psi | 58% | 2405 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 98% | 41,930 psi | 74% | 2625 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 39,668 psi | 70% | 2484 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,682 psi | 68% | 2503 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,207 psi | 76% | 2533 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,860 psi | 46% | 1490 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,889 psi | 79% | 2572 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 44,875 psi | 79% | 2592 fps | 95.5% |
| ReloadSwiss RS 52 | 41.9 gr | 80% | 34,824 psi | 62% | 2497 fps | 95.9% |
| ReloadSwiss RS 60 | 42.5 gr | 80% | 28,863 psi | 51% | 2362 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 36,695 psi | 65% | 2549 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 40,335 psi | 71% | 2615 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 40,814 psi | 72% | 2484 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,375 psi | 63% | 2388 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 28,718 psi | 51% | 2297 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,105 psi | 74% | 2546 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,143 psi | 64% | 2457 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 33,620 psi | 59% | 2375 fps | 97.6% |
| Shooters World SW4350 | <<locked>> | 98% | 44,947 psi | 79% | 2615 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,282 psi | 84% | 2585 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,952 psi | 56% | 2392 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,587 psi | 84% | 2575 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 37,608 psi | 66% | 2454 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,448 psi | 64% | 2448 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,972 psi | 69% | 2405 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,981 psi | 57% | 2280 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 47,601 psi | 84% | 2592 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 42,554 psi | 75% | 2562 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 38,363 psi | 68% | 2408 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 37,260 psi | 66% | 2454 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 29,950 psi | 53% | 2310 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 27,746 psi | 49% | 2333 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 44,193 psi | 78% | 2470 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,073 psi | 69% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,316 psi | 61% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,099 psi | 62% | 2388 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 28,268 psi | 50% | 2251 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 92% | 36,869 psi | 65% | 2484 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 39,755 psi | 70% | 2484 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 33,634 psi | 59% | 2375 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 36,158 psi | 64% | 2493 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,980 psi | 55% | 2320 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 38,740 psi | 68% | 2526 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 45,788 psi | 81% | 2690 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,592 psi | 63% | 2448 fps | 97.4% |
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 93 powders for 7.62 x 53 R Fin. loaded with the .308 | 174gr | Prvi Partizan FMJ BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,825 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,825 fps. Accurate 4350 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 174.0 gr projectile in 0.308" calls for a 1:12.0 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 7.62 x 53 R Fin. with the .308 | 174gr | Prvi Partizan FMJ 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.