Load Specifications
Load data in caliber .25 GT with .257 | 110gr | Nosler AccuBond bullet and 95 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 52 and Hodgdon LEVERevolution.
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% | 55,477 psi | 89% | 2713 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,651 psi | 90% | 2808 fps | 98.9% |
| Accurate 2460 | <<locked>> | 86% | 54,114 psi | 87% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,825 psi | 90% | 2769 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,492 psi | 90% | 2799 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 55,448 psi | 89% | 2812 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,396 psi | 72% | 2707 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 84% | 55,608 psi | 90% | 2664 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,014 psi | 90% | 2687 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,563 psi | 88% | 2802 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 55,448 psi | 89% | 2792 fps | 99% |
| ADI AR 2219 | <<locked>> | 84% | 55,840 psi | 90% | 2779 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 53,925 psi | 87% | 2759 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 53,084 psi | 86% | 2740 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,448 psi | 89% | 2864 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 53,621 psi | 86% | 2900 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 54,317 psi | 88% | 2812 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,608 psi | 90% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,506 psi | 90% | 2835 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,396 psi | 72% | 2707 fps | 96.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 51,488 psi | 83% | 2867 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,505 psi | 88% | 2661 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,954 psi | 87% | 2808 fps | 98.6% |
| Bofors RP3 | <<locked>> | 98% | 54,505 psi | 88% | 2825 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 52,852 psi | 85% | 2700 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 52,272 psi | 84% | 2785 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,867 psi | 87% | 2871 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 86% | 54,331 psi | 88% | 2759 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 55,492 psi | 90% | 2785 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 52,852 psi | 85% | 2782 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 92% | 54,998 psi | 89% | 2812 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,698 psi | 66% | 2598 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,127 psi | 86% | 2835 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,461 psi | 56% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,098 psi | 86% | 2766 fps | 99.5% |
| IMR 3031 | <<locked>> | 92% | 53,998 psi | 87% | 2802 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,882 psi | 89% | 2779 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,825 psi | 90% | 2756 fps | 96% |
| IMR 4198 | <<locked>> | 86% | 55,506 psi | 90% | 2680 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 54,288 psi | 88% | 2762 fps | 95.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,308 psi | 68% | 2651 fps | 96.3% |
| IMR 4895 | <<locked>> | 94% | 53,359 psi | 86% | 2818 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 90% | 53,925 psi | 87% | 2759 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 54,070 psi | 87% | 2749 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 53,055 psi | 86% | 2776 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,810 psi | 88% | 2733 fps | 99.4% |
| Lovex S062 | <<locked>> | 96% | 53,853 psi | 87% | 2772 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2707 fps | 96.4% |
| Norma 200 | <<locked>> | 82% | 55,158 psi | 89% | 2694 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,316 psi | 86% | 2749 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 53,258 psi | 86% | 2753 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,592 psi | 88% | 2825 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2703 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 96% | 54,998 psi | 89% | 2848 fps | 99.3% |
| Ramshot TAC | <<locked>> | 90% | 54,215 psi | 87% | 2766 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,200 psi | 86% | 2789 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,984 psi | 89% | 2759 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,635 psi | 56% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,287 psi | 86% | 2743 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 53,534 psi | 86% | 2762 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,926 psi | 89% | 2894 fps | 99.1% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,027 psi | 89% | 2933 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,034 psi | 71% | 2720 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 90% | 54,331 psi | 88% | 2740 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 53,548 psi | 86% | 2746 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,389 psi | 88% | 2815 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,893 psi | 80% | 2707 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 92% | 53,055 psi | 86% | 2776 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 53,853 psi | 87% | 2772 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 53,577 psi | 86% | 2717 fps | 99.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,956 psi | 90% | 2421 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 52,576 psi | 85% | 2740 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 52,895 psi | 85% | 2825 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,171 psi | 86% | 2700 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 55,883 psi | 90% | 2795 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 56,028 psi | 90% | 2818 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,376 psi | 89% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 54,853 psi | 88% | 2694 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 54,955 psi | 89% | 2795 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 54,563 psi | 88% | 2700 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,187 psi | 89% | 2789 fps | 99.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 54,998 psi | 89% | 2812 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,740 psi | 64% | 2651 fps | 98.6% |
| Vihtavuori N130 | <<locked>> | 88% | 55,361 psi | 89% | 2674 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,216 psi | 89% | 2687 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 55,579 psi | 90% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,867 psi | 87% | 2733 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,258 psi | 86% | 2749 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 2707 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 90% | 54,317 psi | 88% | 2759 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 55,521 psi | 90% | 2779 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,832 psi | 74% | 2703 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,167 psi | 78% | 2690 fps | 99% |
| Winchester 748 | <<locked>> | 90% | 53,185 psi | 86% | 2802 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 52,170 psi | 84% | 2776 fps | 99.5% |
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% | 40,538 psi | 65% | 2490 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,156 psi | 84% | 2753 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 44,266 psi | 71% | 2592 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 33,011 psi | 53% | 2398 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,436 psi | 64% | 2539 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 31,227 psi | 50% | 2379 fps | 98.4% |
| Accurate 4350 | <<locked>> | 96% | 38,609 psi | 62% | 2595 fps | 95.1% |
| Accurate LT-30 | <<locked>> | 80% | 49,023 psi | 79% | 2572 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,400 psi | 80% | 2592 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,492 psi | 60% | 2493 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 38,435 psi | 62% | 2497 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 49,052 psi | 79% | 2684 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,508 psi | 64% | 2513 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 37,956 psi | 61% | 2513 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,556 psi | 73% | 2703 fps | 98.7% |
| Alliant Power Pro 2000-MR | 31.4 gr | 84% | 38,450 psi | 62% | 2605 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,822 psi | 53% | 2411 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 46,224 psi | 75% | 2592 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 38,000 psi | 61% | 2526 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,595 psi | 64% | 2608 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,751 psi | 56% | 2526 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,037 psi | 77% | 2572 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,522 psi | 62% | 2533 fps | 95.2% |
| Bofors RP3 | <<locked>> | 82% | 32,155 psi | 52% | 2411 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,350 psi | 67% | 2507 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,347 psi | 60% | 2520 fps | 98.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 40,973 psi | 66% | 2641 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 44,701 psi | 72% | 2615 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,527 psi | 73% | 2638 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 40,480 psi | 65% | 2569 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 37,739 psi | 61% | 2507 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,924 psi | 55% | 2451 fps | 95.2% |
| Hodgdon LEVERevolution | 29.3 gr | 80% | 33,533 psi | 54% | 2461 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,802 psi | 42% | 1493 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,347 psi | 59% | 2461 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 36,332 psi | 59% | 2510 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 37,826 psi | 61% | 2477 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 52,489 psi | 85% | 2703 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 47,021 psi | 76% | 2562 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 51,503 psi | 83% | 2720 fps | 95% |
| IMR 4831 | <<locked>> | 98% | 39,668 psi | 64% | 2598 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,171 psi | 55% | 2454 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 39,508 psi | 64% | 2513 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 43,859 psi | 71% | 2592 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 35,520 psi | 57% | 2470 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 38,232 psi | 62% | 2441 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 33,025 psi | 53% | 2385 fps | 96.2% |
| Lovex S065 | <<locked>> | 98% | 46,876 psi | 76% | 2657 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 51,779 psi | 84% | 2648 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,506 psi | 59% | 2448 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 36,579 psi | 59% | 2467 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 35,027 psi | 56% | 2464 fps | 95.4% |
| Norma URP | <<locked>> | 96% | 39,276 psi | 63% | 2595 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 36,825 psi | 59% | 2523 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 44,831 psi | 72% | 2608 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,305 psi | 62% | 2520 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,467 psi | 68% | 2549 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 41% | 1519 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,106 psi | 71% | 2595 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 50,314 psi | 81% | 2713 fps | 95.7% |
| ReloadSwiss RS 52 | 29.7 gr | 82% | 36,593 psi | 59% | 2559 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 30,516 psi | 49% | 2425 fps | 96.2% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 41,263 psi | 67% | 2664 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 40,147 psi | 65% | 2503 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 34,693 psi | 56% | 2402 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 84% | 32,097 psi | 52% | 2402 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 46,876 psi | 76% | 2657 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,520 psi | 57% | 2470 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 33,025 psi | 53% | 2385 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,717 psi | 75% | 2612 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,011 psi | 86% | 2385 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,429 psi | 80% | 2694 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,708 psi | 58% | 2503 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,644 psi | 75% | 2605 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 42,569 psi | 69% | 2575 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,984 psi | 58% | 2461 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,218 psi | 62% | 2421 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,314 psi | 51% | 2290 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 42,090 psi | 68% | 2582 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 37,652 psi | 61% | 2425 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,840 psi | 59% | 2470 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 33,344 psi | 54% | 2415 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 30,879 psi | 50% | 2438 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 43,381 psi | 70% | 2500 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,276 psi | 62% | 2428 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,533 psi | 54% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,403 psi | 55% | 2402 fps | 99% |
| Vihtavuori N150 | <<locked>> | 82% | 29,588 psi | 48% | 2303 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 96% | 41,495 psi | 67% | 2602 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 39,334 psi | 63% | 2507 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 33,359 psi | 54% | 2392 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 40,364 psi | 65% | 2602 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,940 psi | 56% | 2431 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 38,145 psi | 62% | 2543 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 35,027 psi | 56% | 2461 fps | 96.1% |
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 95 powders for .25 GT loaded with the .257 | 110gr | Nosler AccuBond. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,933 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,933 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 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 1:10.0 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, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .25 GT with the .257 | 110gr | Nosler AccuBond 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.