Load Specifications
Load data in caliber .25 GT with .257 | 110gr | Hornady ELD-X bullet and 94 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, Hodgdon CFE223 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 54,810 psi | 88% | 2703 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,998 psi | 89% | 2792 fps | 98.8% |
| Accurate 2460 | <<locked>> | 86% | 53,490 psi | 86% | 2730 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,216 psi | 89% | 2759 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,911 psi | 89% | 2789 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 54,810 psi | 88% | 2799 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,816 psi | 71% | 2694 fps | 96.6% |
| Accurate LT-30 | <<locked>> | 84% | 54,984 psi | 89% | 2654 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,390 psi | 89% | 2677 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 53,998 psi | 87% | 2789 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 98% | 54,955 psi | 89% | 2782 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 84% | 55,724 psi | 90% | 2776 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 53,359 psi | 86% | 2749 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 92% | 56,101 psi | 90% | 2776 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,708 psi | 88% | 2851 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 53,156 psi | 86% | 2887 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 53,766 psi | 87% | 2802 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,897 psi | 89% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,940 psi | 89% | 2825 fps | 99.1% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,425 psi | 72% | 2703 fps | 96.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2858 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,983 psi | 87% | 2651 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,461 psi | 86% | 2799 fps | 98.5% |
| Bofors RP3 | <<locked>> | 98% | 53,954 psi | 87% | 2815 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,579 psi | 90% | 2736 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 55,593 psi | 90% | 2828 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,287 psi | 86% | 2858 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 86% | 54,201 psi | 87% | 2756 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,882 psi | 89% | 2776 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,927 psi | 90% | 2825 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 92% | 54,418 psi | 88% | 2802 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,277 psi | 65% | 2585 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 52,591 psi | 85% | 2825 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,418 psi | 56% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,028 psi | 90% | 2805 fps | 99.7% |
| IMR 3031 | <<locked>> | 92% | 53,345 psi | 86% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,346 psi | 88% | 2766 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,332 psi | 89% | 2743 fps | 95.9% |
| IMR 4198 | <<locked>> | 86% | 55,317 psi | 89% | 2674 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,858 psi | 68% | 2638 fps | 96.1% |
| IMR 4895 | <<locked>> | 94% | 52,852 psi | 85% | 2805 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 53,359 psi | 86% | 2749 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 53,534 psi | 86% | 2740 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 52,953 psi | 85% | 2772 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,288 psi | 88% | 2720 fps | 99.3% |
| Lovex S062 | <<locked>> | 96% | 53,824 psi | 87% | 2769 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,429 psi | 80% | 2697 fps | 96.2% |
| Norma 200 | <<locked>> | 82% | 54,969 psi | 89% | 2687 fps | 100% |
| Norma 201 | <<locked>> | 92% | 52,750 psi | 85% | 2740 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 53,171 psi | 86% | 2749 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,041 psi | 87% | 2812 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 44,193 psi | 71% | 2690 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 96% | 54,041 psi | 87% | 2831 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 53,737 psi | 87% | 2753 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 90% | 52,678 psi | 85% | 2776 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,520 psi | 88% | 2746 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,606 psi | 56% | 1699 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,200 psi | 86% | 2736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 53,084 psi | 86% | 2753 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,317 psi | 88% | 2884 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 54,592 psi | 88% | 2923 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,613 psi | 70% | 2707 fps | 96% |
| Rottweil R 901 | <<locked>> | 90% | 53,708 psi | 87% | 2726 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 52,953 psi | 85% | 2733 fps | 99.7% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 53,795 psi | 87% | 2802 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,429 psi | 80% | 2697 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 52,953 psi | 85% | 2772 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 53,824 psi | 87% | 2769 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 52,982 psi | 85% | 2703 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,695 psi | 90% | 2415 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,840 psi | 90% | 2782 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 55,811 psi | 90% | 2864 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 56,014 psi | 90% | 2733 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 55,332 psi | 89% | 2782 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,506 psi | 90% | 2805 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,781 psi | 88% | 2687 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 54,288 psi | 88% | 2684 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 54,433 psi | 88% | 2782 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 53,983 psi | 87% | 2690 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,694 psi | 88% | 2779 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 54,462 psi | 88% | 2802 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,349 psi | 63% | 2638 fps | 98.5% |
| Vihtavuori N130 | <<locked>> | 88% | 54,737 psi | 88% | 2661 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,607 psi | 88% | 2674 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 55,434 psi | 89% | 2756 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,301 psi | 86% | 2723 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,750 psi | 85% | 2740 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,702 psi | 75% | 2694 fps | 96.9% |
| Vihtavuori N530 | <<locked>> | 90% | 53,737 psi | 87% | 2746 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 55,027 psi | 89% | 2769 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,411 psi | 73% | 2694 fps | 96.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,877 psi | 77% | 2684 fps | 98.9% |
| Winchester 748 | <<locked>> | 90% | 52,576 psi | 85% | 2789 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 55,085 psi | 89% | 2815 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% | 40,364 psi | 65% | 2484 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,503 psi | 83% | 2736 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 43,758 psi | 71% | 2579 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 32,779 psi | 53% | 2392 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 38,885 psi | 63% | 2526 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 31,024 psi | 50% | 2372 fps | 98.3% |
| Accurate 4350 | <<locked>> | 98% | 40,872 psi | 66% | 2638 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 48,878 psi | 79% | 2566 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,197 psi | 79% | 2585 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,985 psi | 60% | 2480 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 86% | 37,956 psi | 61% | 2484 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 48,428 psi | 78% | 2671 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,957 psi | 63% | 2497 fps | 97.8% |
| Alliant AR-Comp | <<locked>> | 80% | 37,695 psi | 61% | 2507 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,875 psi | 72% | 2687 fps | 98.5% |
| Alliant Power Pro 2000-MR | 31.8 gr | 86% | 40,495 psi | 65% | 2648 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,358 psi | 52% | 2398 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,585 psi | 74% | 2579 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 37,492 psi | 60% | 2513 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 41,727 psi | 67% | 2648 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,374 psi | 55% | 2513 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,514 psi | 77% | 2559 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,392 psi | 62% | 2526 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 31,691 psi | 51% | 2398 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,191 psi | 66% | 2500 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,854 psi | 59% | 2507 fps | 97.9% |
| Hodgdon CFE223 | 30.3 gr | 80% | 40,480 psi | 65% | 2628 fps | 96.4% |
| Hodgdon H322 | <<locked>> | 80% | 44,498 psi | 72% | 2608 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,991 psi | 73% | 2625 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 43,076 psi | 69% | 2615 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 37,188 psi | 60% | 2490 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,752 psi | 58% | 2490 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,083 psi | 53% | 2444 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 41% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,853 psi | 58% | 2448 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 36,100 psi | 58% | 2503 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 37,318 psi | 60% | 2464 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 92% | 52,011 psi | 84% | 2694 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 46,296 psi | 75% | 2546 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 39,218 psi | 63% | 2585 fps | 95.3% |
| IMR 4895 | <<locked>> | 82% | 35,940 psi | 58% | 2490 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 38,957 psi | 63% | 2497 fps | 97.8% |
| Lovex D073.5 | <<locked>> | 80% | 43,308 psi | 70% | 2579 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 35,317 psi | 57% | 2464 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 38,058 psi | 61% | 2434 fps | 96.3% |
| Lovex S062 | <<locked>> | 80% | 32,851 psi | 53% | 2379 fps | 96.1% |
| Lovex S065 | <<locked>> | 98% | 46,398 psi | 75% | 2644 fps | 95.5% |
| Norma 200 | <<locked>> | 80% | 51,561 psi | 83% | 2641 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,274 psi | 59% | 2441 fps | 97.2% |
| Norma 202 | <<locked>> | 80% | 36,405 psi | 59% | 2461 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 34,519 psi | 56% | 2451 fps | 95.1% |
| Norma URP | <<locked>> | 98% | 41,423 psi | 67% | 2638 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 84% | 36,376 psi | 59% | 2510 fps | 95.4% |
| Ramshot TAC | <<locked>> | 84% | 44,382 psi | 72% | 2595 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,826 psi | 61% | 2507 fps | 96.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,337 psi | 68% | 2543 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 42% | 1522 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,947 psi | 71% | 2589 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 49,864 psi | 80% | 2700 fps | 95.5% |
| ReloadSwiss RS 52 | 30.2 gr | 84% | 38,928 psi | 63% | 2608 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 30,153 psi | 49% | 2408 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 40,901 psi | 66% | 2654 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 39,929 psi | 64% | 2497 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 34,519 psi | 56% | 2395 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 31,923 psi | 51% | 2395 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 98% | 46,398 psi | 75% | 2644 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,317 psi | 57% | 2464 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 32,851 psi | 53% | 2379 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,180 psi | 74% | 2598 fps | 98.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,736 psi | 85% | 2379 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,863 psi | 79% | 2680 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,636 psi | 57% | 2497 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,427 psi | 75% | 2598 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 42,047 psi | 68% | 2562 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,505 psi | 57% | 2448 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,043 psi | 61% | 2415 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,111 psi | 50% | 2283 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 41,582 psi | 67% | 2569 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 37,478 psi | 60% | 2421 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,390 psi | 59% | 2457 fps | 95.6% |
| Somchem S355 | <<locked>> | 84% | 33,156 psi | 53% | 2408 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 30,530 psi | 49% | 2421 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 43,149 psi | 70% | 2493 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,087 psi | 61% | 2421 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,301 psi | 54% | 2395 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,229 psi | 55% | 2395 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 29,428 psi | 47% | 2300 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 96% | 41,046 psi | 66% | 2592 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,783 psi | 63% | 2490 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 80% | 32,909 psi | 53% | 2382 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 98% | 42,627 psi | 69% | 2641 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,621 psi | 56% | 2421 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 37,623 psi | 61% | 2530 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,548 psi | 56% | 2444 fps | 95.8% |
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 .25 GT loaded with the .257 | 110gr | Hornady ELD-X. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,923 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 (427 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 110.0 gr projectile in 0.257" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for .25 GT with the .257 | 110gr | Hornady ELD-X 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.