
Load Specifications
Load data in caliber .30-06 Spring. with .311 | 174gr | Frontier PH HPFB bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 50,009 psi | 85% | 2536 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 51,517 psi | 88% | 2598 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 51,169 psi | 87% | 2598 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 49,647 psi | 85% | 2608 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 50,908 psi | 87% | 2635 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,024 psi | 85% | 2697 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 88% | 52,170 psi | 89% | 2664 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 92% | 50,038 psi | 85% | 2615 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 51,677 psi | 88% | 2625 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 51,663 psi | 88% | 2608 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 52,939 psi | 90% | 2720 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 51,314 psi | 87% | 2762 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 52,634 psi | 90% | 2684 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 52,953 psi | 90% | 2582 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 50,183 psi | 85% | 2654 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,037 psi | 83% | 2700 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 49,545 psi | 84% | 2736 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,664 psi | 59% | 2441 fps | 96.5% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 51,764 psi | 88% | 2674 fps | 99% |
| Bofors RP3 | <<locked>> | 94% | 53,069 psi | 90% | 2697 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 84% | 50,401 psi | 86% | 2566 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 50,401 psi | 86% | 2651 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 51,735 psi | 88% | 2733 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 52,141 psi | 89% | 2621 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,924 psi | 90% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 50,807 psi | 86% | 2654 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 98% | 49,995 psi | 85% | 2694 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 88% | 52,692 psi | 90% | 2674 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,991 psi | 77% | 2585 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 51,358 psi | 87% | 2700 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,867 psi | 59% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 50,821 psi | 87% | 2631 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 52,083 psi | 89% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 52,634 psi | 90% | 2644 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,980 psi | 85% | 2575 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 52,475 psi | 89% | 2641 fps | 96.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,384 psi | 81% | 2638 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 51,430 psi | 88% | 2684 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 86% | 51,677 psi | 88% | 2625 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 51,358 psi | 87% | 2608 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 51,561 psi | 88% | 2644 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 52,228 psi | 89% | 2598 fps | 99.6% |
| Lovex S062 | <<locked>> | 92% | 52,199 psi | 89% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 51,256 psi | 87% | 2635 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,083 psi | 89% | 2664 fps | 96.7% |
| Norma 201 | <<locked>> | 88% | 51,111 psi | 87% | 2615 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 51,590 psi | 88% | 2625 fps | 100% |
| Norma 203B | <<locked>> | 92% | 52,663 psi | 90% | 2690 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 49,545 psi | 84% | 2687 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 92% | 52,924 psi | 90% | 2713 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,602 psi | 83% | 2677 fps | 96.7% |
| Ramshot TAC | <<locked>> | 86% | 51,909 psi | 88% | 2635 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 51,039 psi | 87% | 2654 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 52,460 psi | 89% | 2621 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,389 psi | 60% | 1660 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 51,155 psi | 87% | 2608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 51,619 psi | 88% | 2638 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 49,995 psi | 85% | 2710 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,881 psi | 90% | 2792 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,429 psi | 84% | 2713 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,082 psi | 85% | 2733 fps | 98% |
| Rottweil R 901 | <<locked>> | 86% | 52,417 psi | 89% | 2608 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 51,648 psi | 88% | 2615 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 52,924 psi | 90% | 2687 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 51,256 psi | 87% | 2635 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 51,561 psi | 88% | 2644 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 52,199 psi | 89% | 2644 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,083 psi | 89% | 2664 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 51,213 psi | 87% | 2697 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 49,879 psi | 85% | 2608 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 50,763 psi | 86% | 2638 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,127 psi | 90% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 52,736 psi | 90% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,793 psi | 88% | 2592 fps | 96.3% |
| Somchem S321 | <<locked>> | 84% | 52,504 psi | 89% | 2654 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 52,199 psi | 89% | 2566 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,852 psi | 90% | 2654 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 50,009 psi | 85% | 2638 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,193 psi | 75% | 2641 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 52,765 psi | 90% | 2536 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 50,111 psi | 85% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 50,894 psi | 87% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 51,996 psi | 89% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 51,619 psi | 88% | 2621 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,214 psi | 89% | 2687 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 52,054 psi | 89% | 2625 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 50,024 psi | 85% | 2595 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,024 psi | 87% | 2687 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,941 psi | 63% | 2510 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,924 psi | 90% | 2671 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 51,271 psi | 87% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 49,995 psi | 85% | 2694 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 50,270 psi | 86% | 2644 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,295 psi | 75% | 2454 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,240 psi | 82% | 2552 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,811 psi | 63% | 2375 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,424 psi | 74% | 2513 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 34,766 psi | 59% | 2362 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 35,215 psi | 60% | 2428 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 40,567 psi | 69% | 2464 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 34,635 psi | 59% | 2326 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,569 psi | 72% | 2477 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 42,061 psi | 72% | 2474 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,487 psi | 84% | 2664 fps | 99.6% |
| Alliant Power Pro 2000-MR | 45.6 gr | 80% | 36,608 psi | 62% | 2474 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,794 psi | 58% | 2343 fps | 97% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,835 psi | 85% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,434 psi | 62% | 2398 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,940 psi | 61% | 2438 fps | 95.1% |
| Alliant Reloder-17 | 46.1 gr | 82% | 31,314 psi | 53% | 2352 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,547 psi | 55% | 2385 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,566 psi | 67% | 2464 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 33,272 psi | 57% | 2343 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,643 psi | 76% | 2474 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,944 psi | 70% | 2493 fps | 99.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,063 psi | 77% | 2621 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 48,747 psi | 83% | 2575 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,632 psi | 84% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,247 psi | 67% | 2451 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 96% | 46,804 psi | 80% | 2638 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 40,857 psi | 70% | 2477 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,951 psi | 53% | 2293 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,956 psi | 63% | 2448 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,933 psi | 44% | 1447 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,392 psi | 67% | 2434 fps | 98.1% |
| IMR 3031 | <<locked>> | 80% | 40,190 psi | 68% | 2480 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,318 psi | 62% | 2356 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,934 psi | 80% | 2523 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,514 psi | 79% | 2546 fps | 95% |
| IMR 4831 | <<locked>> | 92% | 36,622 psi | 62% | 2441 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 37,260 psi | 63% | 2428 fps | 97.2% |
| IMR 8208 XBR | <<locked>> | 80% | 42,569 psi | 72% | 2477 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 48,138 psi | 82% | 2559 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,146 psi | 67% | 2448 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 41,205 psi | 70% | 2415 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 36,129 psi | 62% | 2365 fps | 98% |
| Lovex S065 | <<locked>> | 90% | 40,408 psi | 69% | 2444 fps | 95% |
| Lovex S070 | <<locked>> | 96% | 46,050 psi | 78% | 2566 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 39,871 psi | 68% | 2425 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 39,856 psi | 68% | 2434 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 35,795 psi | 61% | 2388 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 35,911 psi | 61% | 2431 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 35,230 psi | 60% | 2395 fps | 96.2% |
| Ramshot Hunter | <<locked>> | 96% | 42,772 psi | 73% | 2572 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 42,598 psi | 73% | 2477 fps | 95.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,872 psi | 71% | 2497 fps | 98.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,079 psi | 78% | 2523 fps | 98.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,237 psi | 45% | 1483 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,935 psi | 82% | 2559 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 45,179 psi | 77% | 2533 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 37,695 psi | 64% | 2487 fps | 96.6% |
| ReloadSwiss RS 60 | 44.9 gr | 80% | 31,082 psi | 53% | 2359 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,594 psi | 64% | 2497 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 40,988 psi | 70% | 2562 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 43,729 psi | 74% | 2470 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,942 psi | 65% | 2382 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 31,357 psi | 53% | 2293 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,408 psi | 69% | 2444 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,146 psi | 67% | 2448 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 36,129 psi | 62% | 2365 fps | 98% |
| Shooters World SW4350 | <<locked>> | 96% | 46,050 psi | 78% | 2566 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,300 psi | 55% | 2333 fps | 95.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,756 psi | 69% | 2451 fps | 96% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,073 psi | 67% | 2434 fps | 97.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,394 psi | 70% | 2392 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,171 psi | 58% | 2264 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 48,327 psi | 82% | 2539 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 45,890 psi | 78% | 2552 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 40,915 psi | 70% | 2392 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,350 psi | 69% | 2451 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 32,343 psi | 55% | 2300 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 28,224 psi | 48% | 2277 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 46,847 psi | 80% | 2454 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,597 psi | 71% | 2388 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,999 psi | 63% | 2372 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,869 psi | 64% | 2379 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,719 psi | 52% | 2244 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 37,637 psi | 64% | 2434 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 42,627 psi | 73% | 2474 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 80% | 36,434 psi | 62% | 2365 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 36,767 psi | 63% | 2434 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 34,751 psi | 59% | 2464 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,285 psi | 53% | 2264 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 41,756 psi | 71% | 2513 fps | 99.6% |
| Winchester 760 | <<locked>> | 96% | 46,804 psi | 80% | 2638 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,479 psi | 66% | 2441 fps | 98% |
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 .30-06 Spring. loaded with the .311 | 174gr | Frontier PH HPFB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,792 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,792 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 (405 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 174.0 gr projectile in 0.311" calls for a 1:12.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .30-06 Spring. with the .311 | 174gr | Frontier PH HPFB 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.