Load Specifications
Load data in caliber .25 GT with .257 | 100gr | Frontier BTSP bullet and 89 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 CFE223.
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>> | 92% | 55,230 psi | 89% | 2848 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 55,680 psi | 90% | 2936 fps | 98.2% |
| Accurate 2230 | <<locked>> | 82% | 52,605 psi | 85% | 2887 fps | 98% |
| Accurate 2460 | <<locked>> | 88% | 53,577 psi | 86% | 2864 fps | 100% |
| Accurate 2495 | <<locked>> | 98% | 54,882 psi | 89% | 2897 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,708 psi | 88% | 2920 fps | 100% |
| Accurate 4064ᴾ | <<locked>> | 100% | 54,404 psi | 88% | 2930 fps | 100% |
| Accurate LT-30 | <<locked>> | 86% | 55,593 psi | 90% | 2795 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 56,014 psi | 90% | 2818 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 54,128 psi | 87% | 2923 fps | 98.7% |
| ADI AR 2207 | <<locked>> | 82% | 53,867 psi | 87% | 2779 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 55,114 psi | 89% | 2913 fps | 98.2% |
| ADI AR 2219 | <<locked>> | 86% | 55,651 psi | 90% | 2913 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 53,664 psi | 87% | 2884 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 94% | 56,043 psi | 90% | 2920 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 54,926 psi | 89% | 2992 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 53,534 psi | 86% | 3018 fps | 97.9% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 53,577 psi | 86% | 2930 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 88% | 55,114 psi | 89% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 54,810 psi | 88% | 2953 fps | 98.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,616 psi | 77% | 2917 fps | 98.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 54,665 psi | 88% | 2792 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 54,882 psi | 89% | 2795 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,693 psi | 87% | 2930 fps | 97.7% |
| Bofors RP3ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 2946 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 92% | 56,101 psi | 90% | 2874 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 94% | 55,361 psi | 89% | 2959 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 90% | 53,447 psi | 86% | 2995 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 88% | 54,114 psi | 87% | 2894 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 55,521 psi | 90% | 2920 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 52,156 psi | 84% | 2894 fps | 96.7% |
| Hodgdon H4198 | <<locked>> | 82% | 54,476 psi | 88% | 2799 fps | 100% |
| Hodgdon H4895 | <<locked>> | 94% | 54,520 psi | 88% | 2933 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 52,721 psi | 85% | 2959 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,113 psi | 55% | 1745 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 52,837 psi | 85% | 2887 fps | 98.8% |
| IMR 3031 | <<locked>> | 94% | 53,301 psi | 86% | 2933 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 54,520 psi | 88% | 2897 fps | 98.3% |
| IMR 4198 | <<locked>> | 88% | 55,883 psi | 90% | 2825 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 52,736 psi | 85% | 2936 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 92% | 53,664 psi | 87% | 2884 fps | 99.4% |
| Lovex D073.4 | <<locked>> | 82% | 53,447 psi | 86% | 2874 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 88% | 53,519 psi | 86% | 2871 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 94% | 52,721 psi | 85% | 2900 fps | 99.9% |
| Lovex S060 | <<locked>> | 94% | 54,853 psi | 88% | 2858 fps | 98.7% |
| Lovex S062 | <<locked>> | 98% | 53,316 psi | 86% | 2890 fps | 99.4% |
| Norma 200 | <<locked>> | 84% | 55,100 psi | 89% | 2831 fps | 100% |
| Norma 201 | <<locked>> | 96% | 55,883 psi | 90% | 2917 fps | 99.6% |
| Norma 202 | <<locked>> | 94% | 52,779 psi | 85% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 98% | 53,853 psi | 87% | 2943 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 98% | 54,085 psi | 87% | 2963 fps | 98.6% |
| Ramshot TAC | <<locked>> | 92% | 54,302 psi | 88% | 2887 fps | 96.4% |
| Ramshot Wild Boar | <<locked>> | 92% | 53,069 psi | 86% | 2910 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 90% | 55,172 psi | 89% | 2884 fps | 98.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,185 psi | 55% | 1785 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 53,577 psi | 86% | 2877 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 54,346 psi | 88% | 3018 fps | 98.4% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,879 psi | 82% | 2992 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 92% | 53,650 psi | 87% | 2861 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 53,185 psi | 86% | 2867 fps | 99.4% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,995 psi | 81% | 2874 fps | 98.7% |
| Shooters World AR Plus | <<locked>> | 82% | 53,447 psi | 86% | 2874 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 52,721 psi | 85% | 2900 fps | 99.9% |
| Shooters World Precision | <<locked>> | 98% | 53,316 psi | 86% | 2890 fps | 99.4% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 53,447 psi | 86% | 2838 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 53,229 psi | 86% | 2516 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 52,765 psi | 85% | 2874 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,996 psi | 84% | 2936 fps | 98.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 52,736 psi | 85% | 2831 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 94% | 55,724 psi | 90% | 2913 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,941 psi | 90% | 2943 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 55,492 psi | 90% | 2828 fps | 100% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2818 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 54,911 psi | 89% | 2923 fps | 99.6% |
| Somchem S335 | <<locked>> | 94% | 54,302 psi | 88% | 2828 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 54,998 psi | 89% | 2910 fps | 98.7% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,850 psi | 82% | 2877 fps | 98.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,564 psi | 59% | 2687 fps | 96.5% |
| Vihtavuori N120 | <<locked>> | 82% | 53,751 psi | 87% | 2726 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 54,955 psi | 89% | 2802 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 55,143 psi | 89% | 2818 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 54,897 psi | 89% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 53,330 psi | 86% | 2858 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 2815 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 92% | 54,012 psi | 87% | 2881 fps | 99.5% |
| Vihtavuori N540 | <<locked>> | 98% | 54,911 psi | 89% | 2900 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 45,150 psi | 73% | 2746 fps | 97.4% |
| Winchester 748 | <<locked>> | 92% | 52,881 psi | 85% | 2927 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 96% | 55,361 psi | 89% | 2949 fps | 99.2% |
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% | 37,884 psi | 61% | 2562 fps | 99.9% |
| Accurate 2200 | <<locked>> | 80% | 48,979 psi | 79% | 2825 fps | 97% |
| Accurate 2230 | <<locked>> | 80% | 49,284 psi | 79% | 2831 fps | 97.5% |
| Accurate 2460 | <<locked>> | 80% | 40,814 psi | 66% | 2651 fps | 99.1% |
| Accurate 2495 | <<locked>> | 80% | 30,298 psi | 49% | 2454 fps | 99.2% |
| Accurate 2520 | <<locked>> | 80% | 36,361 psi | 59% | 2595 fps | 97.9% |
| Accurate 4064 | <<locked>> | 80% | 28,645 psi | 46% | 2425 fps | 96.6% |
| Accurate LT-30 | <<locked>> | 80% | 46,470 psi | 75% | 2657 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 46,847 psi | 76% | 2674 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 39,305 psi | 63% | 2648 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 50,488 psi | 81% | 2733 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 42,989 psi | 69% | 2703 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 45,803 psi | 74% | 2762 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 36,593 psi | 59% | 2566 fps | 96.1% |
| Alliant AR-Comp | <<locked>> | 80% | 35,041 psi | 57% | 2585 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 41,901 psi | 68% | 2756 fps | 97% |
| Alliant Power Pro 2000-MR | 33.8 gr | 90% | 43,555 psi | 70% | 2828 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,548 psi | 56% | 2569 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 42,975 psi | 69% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 40,030 psi | 65% | 2684 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 94% | 39,117 psi | 63% | 2736 fps | 95.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 51,343 psi | 83% | 2746 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 45,223 psi | 73% | 2648 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 43,874 psi | 71% | 2756 fps | 95.5% |
| Bofors RP3 | <<locked>> | 88% | 36,056 psi | 58% | 2618 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,943 psi | 63% | 2572 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,548 psi | 56% | 2572 fps | 96.2% |
| Hodgdon CFE223 | 31.6 gr | 82% | 40,843 psi | 66% | 2756 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 80% | 41,698 psi | 67% | 2687 fps | 99.8% |
| Hodgdon H335 | <<locked>> | 80% | 42,438 psi | 68% | 2707 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 94% | 45,832 psi | 74% | 2785 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 51,169 psi | 83% | 2753 fps | 100% |
| Hodgdon H4895 | <<locked>> | 82% | 37,130 psi | 60% | 2608 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,621 psi | 57% | 2621 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,208 psi | 41% | 1558 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 38,232 psi | 62% | 2615 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 33,576 psi | 54% | 2572 fps | 99.2% |
| IMR 4064 | <<locked>> | 88% | 39,755 psi | 64% | 2631 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 43,947 psi | 71% | 2644 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 38,435 psi | 62% | 2667 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 36,593 psi | 59% | 2566 fps | 96.1% |
| Lovex D073.4 | <<locked>> | 80% | 50,082 psi | 81% | 2822 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 80% | 40,756 psi | 66% | 2651 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 32,677 psi | 53% | 2523 fps | 96.8% |
| Lovex S060 | <<locked>> | 82% | 38,319 psi | 62% | 2556 fps | 95.2% |
| Lovex S062 | <<locked>> | 84% | 34,592 psi | 56% | 2533 fps | 95.6% |
| Norma 200 | <<locked>> | 80% | 48,588 psi | 78% | 2740 fps | 100% |
| Norma 201 | <<locked>> | 80% | 34,055 psi | 55% | 2507 fps | 95.4% |
| Norma 202 | <<locked>> | 80% | 34,055 psi | 55% | 2530 fps | 97.9% |
| Norma 203B | <<locked>> | 88% | 39,305 psi | 63% | 2674 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 88% | 38,986 psi | 63% | 2680 fps | 95.1% |
| Ramshot TAC | <<locked>> | 90% | 50,676 psi | 82% | 2828 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 37,884 psi | 61% | 2625 fps | 95% |
| Ramshot X-Terminator | <<locked>> | 80% | 39,813 psi | 64% | 2608 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,382 psi | 41% | 1594 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,307 psi | 67% | 2664 fps | 98.6% |
| ReloadSwiss RS 52 | 32.1 gr | 88% | 41,437 psi | 67% | 2782 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 32,140 psi | 52% | 2569 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 37,623 psi | 61% | 2572 fps | 98.5% |
| Rottweil R 902 | <<locked>> | 82% | 34,534 psi | 56% | 2510 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 90% | 35,926 psi | 58% | 2605 fps | 95.4% |
| Shooters World AR Plus | <<locked>> | 80% | 50,082 psi | 81% | 2822 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,677 psi | 53% | 2523 fps | 96.8% |
| Shooters World Precision | <<locked>> | 84% | 34,592 psi | 56% | 2533 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 43,758 psi | 71% | 2677 fps | 97.6% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 50,879 psi | 82% | 2487 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 46,209 psi | 75% | 2769 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 40,234 psi | 65% | 2713 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 43,729 psi | 71% | 2687 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 48,617 psi | 78% | 2802 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 37,942 psi | 61% | 2615 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,911 psi | 58% | 2490 fps | 98.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,211 psi | 47% | 2346 fps | 97.4% |
| Somchem S321 | <<locked>> | 80% | 39,189 psi | 63% | 2644 fps | 97.3% |
| Somchem S335 | <<locked>> | 80% | 35,273 psi | 57% | 2490 fps | 98.8% |
| Somchem S341 | <<locked>> | 84% | 39,117 psi | 63% | 2631 fps | 95.3% |
| Somchem S355 | <<locked>> | 90% | 37,391 psi | 60% | 2621 fps | 95.6% |
| Somchem S365 | <<locked>> | 98% | 34,360 psi | 55% | 2631 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 50,444 psi | 81% | 2684 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 40,785 psi | 66% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,868 psi | 58% | 2497 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 80% | 30,980 psi | 50% | 2461 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 80% | 31,995 psi | 52% | 2461 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 88% | 33,286 psi | 54% | 2503 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 36,376 psi | 59% | 2556 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 80% | 30,690 psi | 49% | 2441 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 39,668 psi | 64% | 2638 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 35,346 psi | 57% | 2598 fps | 96.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 37,159 psi | 60% | 2621 fps | 95.6% |
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 89 powders for .25 GT loaded with the .257 | 100gr | Frontier BTSP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,745 fps to 3,018 fps. Accurate 4064 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.257" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4064, ADI AR 2208, Alliant Reloder- TS 15.5 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 CFE223 rank at the top here: for .25 GT with the .257 | 100gr | Frontier BTSP 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.