Load Specifications
Load data in caliber .25 WSSM with .257 | 95gr | Hammer HHT 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 52 and ReloadSwiss RS 60.
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>> | 90% | 57,348 psi | 90% | 3091 fps | 100% |
| Accurate 2460 | <<locked>> | 86% | 56,115 psi | 88% | 3117 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,636 psi | 86% | 3097 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,244 psi | 85% | 3127 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 54,563 psi | 86% | 3143 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 3081 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 84% | 57,072 psi | 89% | 3038 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 57,508 psi | 90% | 3064 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,927 psi | 89% | 3189 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 54,418 psi | 85% | 3123 fps | 98.8% |
| ADI AR 2219 | <<locked>> | 82% | 54,447 psi | 85% | 3114 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 56,144 psi | 88% | 3143 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 56,072 psi | 88% | 3127 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,869 psi | 89% | 3310 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 57,130 psi | 90% | 3202 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 57,522 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 54,665 psi | 86% | 3173 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,992 psi | 74% | 3097 fps | 97.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,665 psi | 86% | 3268 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 56,840 psi | 89% | 3031 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 57,130 psi | 90% | 3202 fps | 98.9% |
| Bofors RP3 | <<locked>> | 96% | 54,027 psi | 85% | 3159 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,752 psi | 86% | 3074 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 55,172 psi | 86% | 3169 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 57,159 psi | 90% | 3278 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 56,985 psi | 89% | 3150 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,447 psi | 85% | 3120 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 55,811 psi | 87% | 3173 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 92% | 57,493 psi | 90% | 3205 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,989 psi | 67% | 2966 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 56,405 psi | 88% | 3232 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,374 psi | 54% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 55,230 psi | 87% | 3146 fps | 99.6% |
| IMR 3031 | <<locked>> | 92% | 56,695 psi | 89% | 3189 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 57,348 psi | 90% | 3166 fps | 99.3% |
| IMR 4198 | <<locked>> | 84% | 54,462 psi | 85% | 3018 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3156 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,976 psi | 70% | 3018 fps | 96.7% |
| IMR 4895 | <<locked>> | 94% | 56,101 psi | 88% | 3212 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 90% | 56,144 psi | 88% | 3143 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 56,289 psi | 88% | 3130 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,999 psi | 88% | 3163 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 57,043 psi | 89% | 3117 fps | 99.5% |
| Lovex S062 | <<locked>> | 96% | 56,681 psi | 89% | 3163 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3081 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 56,753 psi | 89% | 3068 fps | 100% |
| Norma 201 | <<locked>> | 92% | 55,376 psi | 87% | 3130 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 55,883 psi | 88% | 3140 fps | 100% |
| Norma 203B | <<locked>> | 96% | 57,029 psi | 89% | 3209 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 47,021 psi | 74% | 3074 fps | 97% |
| Ramshot Big Game | <<locked>> | 94% | 54,433 psi | 85% | 3182 fps | 99.2% |
| Ramshot TAC | <<locked>> | 90% | 56,898 psi | 89% | 3153 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,970 psi | 88% | 3176 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 57,464 psi | 90% | 3143 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,679 psi | 54% | 1969 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 55,912 psi | 88% | 3133 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 56,173 psi | 88% | 3146 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 54,607 psi | 86% | 3238 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,259 psi | 85% | 3274 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 47,007 psi | 74% | 3100 fps | 96.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,269 psi | 76% | 3123 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 90% | 56,086 psi | 88% | 3117 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,825 psi | 87% | 3127 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 57,290 psi | 90% | 3202 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3081 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,999 psi | 88% | 3163 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,681 psi | 89% | 3163 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,492 psi | 87% | 3091 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,956 psi | 89% | 2769 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,824 psi | 86% | 3120 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 55,854 psi | 88% | 3215 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 54,056 psi | 85% | 3015 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,868 psi | 86% | 3123 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 55,361 psi | 87% | 3156 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 54,027 psi | 85% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 57,566 psi | 90% | 3071 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 53,766 psi | 84% | 3120 fps | 99.8% |
| Somchem S335 | <<locked>> | 92% | 56,565 psi | 89% | 3071 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 54,273 psi | 85% | 3120 fps | 99.2% |
| Somchem S355ᴾ | <<locked>> | 100% | 57,696 psi | 90% | 3199 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,974 psi | 66% | 3018 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 88% | 57,334 psi | 90% | 3048 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,056 psi | 85% | 3015 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,926 psi | 86% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 56,492 psi | 89% | 3114 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 3130 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,690 psi | 78% | 3081 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 90% | 56,724 psi | 89% | 3143 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 54,839 psi | 86% | 3110 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,878 psi | 77% | 3084 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,169 psi | 80% | 3071 fps | 99.3% |
| Winchester 748 | <<locked>> | 90% | 55,985 psi | 88% | 3189 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,172 psi | 86% | 3166 fps | 99.6% |
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% | 41,829 psi | 66% | 2838 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,542 psi | 71% | 2943 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 33,997 psi | 53% | 2723 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 40,930 psi | 64% | 2887 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 32,184 psi | 50% | 2700 fps | 98.3% |
| Accurate 4350 | <<locked>> | 96% | 40,654 psi | 64% | 2949 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 50,401 psi | 79% | 2936 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,836 psi | 80% | 2959 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,392 psi | 60% | 2831 fps | 96% |
| ADI AR 2208 | <<locked>> | 86% | 39,769 psi | 62% | 2841 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 50,908 psi | 80% | 3058 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,451 psi | 63% | 2851 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 39,726 psi | 62% | 2864 fps | 100% |
| Alliant Power Pro 2000-MR | 39.6 gr | 84% | 39,856 psi | 62% | 2959 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,881 psi | 53% | 2736 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,311 psi | 74% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 39,233 psi | 61% | 2867 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 41,220 psi | 65% | 2966 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,085 psi | 57% | 2871 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,574 psi | 78% | 2923 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,335 psi | 63% | 2887 fps | 95.4% |
| Bofors RP3 | <<locked>> | 82% | 33,127 psi | 52% | 2730 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,641 psi | 67% | 2858 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,899 psi | 61% | 2867 fps | 98.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,627 psi | 67% | 3005 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 80% | 46,412 psi | 73% | 2979 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,413 psi | 74% | 3002 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,235 psi | 66% | 2920 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 38,667 psi | 61% | 2841 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,317 psi | 55% | 2789 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,722 psi | 54% | 2795 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,382 psi | 40% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,347 psi | 59% | 2795 fps | 96.2% |
| IMR 3031 | <<locked>> | 80% | 37,942 psi | 59% | 2861 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 39,030 psi | 61% | 2818 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 48,254 psi | 76% | 2923 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,737 psi | 84% | 3097 fps | 95.4% |
| IMR 4831 | <<locked>> | 96% | 39,436 psi | 62% | 2900 fps | 95% |
| IMR 4895 | <<locked>> | 82% | 37,521 psi | 59% | 2841 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 40,451 psi | 63% | 2851 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 80% | 45,368 psi | 71% | 2946 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 36,753 psi | 58% | 2805 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 39,291 psi | 62% | 2782 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 33,953 psi | 53% | 2710 fps | 96.1% |
| Lovex S065 | <<locked>> | 96% | 46,122 psi | 72% | 2969 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 53,519 psi | 84% | 3022 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,652 psi | 59% | 2789 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 37,855 psi | 59% | 2808 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 36,027 psi | 56% | 2795 fps | 95.3% |
| Norma URP | <<locked>> | 96% | 41,321 psi | 65% | 2956 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 84% | 38,189 psi | 60% | 2864 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 46,383 psi | 73% | 2966 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,784 psi | 62% | 2867 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 44,019 psi | 69% | 2904 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,744 psi | 40% | 1765 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,556 psi | 71% | 2956 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 49,327 psi | 77% | 3028 fps | 95.2% |
| ReloadSwiss RS 52 | 37.5 gr | 82% | 38,116 psi | 60% | 2910 fps | 95.2% |
| ReloadSwiss RS 60 | 38.1 gr | 82% | 31,415 psi | 49% | 2746 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,944 psi | 64% | 2972 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 45,150 psi | 71% | 3058 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 41,249 psi | 65% | 2851 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 35,766 psi | 56% | 2733 fps | 96.6% |
| Rottweil R 903 | <<locked>> | 84% | 33,330 psi | 52% | 2730 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 46,122 psi | 72% | 2969 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,753 psi | 58% | 2805 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 33,953 psi | 53% | 2710 fps | 96.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,559 psi | 76% | 2976 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 54,143 psi | 85% | 2733 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 51,387 psi | 81% | 3068 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 37,478 psi | 59% | 2854 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 39,508 psi | 62% | 2766 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 44,193 psi | 69% | 2930 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 37,130 psi | 58% | 2795 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,305 psi | 62% | 2759 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,227 psi | 51% | 2605 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 43,555 psi | 68% | 2936 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 38,870 psi | 61% | 2762 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 38,159 psi | 60% | 2808 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 34,505 psi | 54% | 2743 fps | 95.3% |
| Somchem S365 | <<locked>> | 92% | 31,995 psi | 50% | 2766 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 44,628 psi | 70% | 2848 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,508 psi | 62% | 2766 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,664 psi | 54% | 2733 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 35,839 psi | 56% | 2740 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 30,618 psi | 48% | 2618 fps | 95.4% |
| Vihtavuori N160 | <<locked>> | 94% | 40,828 psi | 64% | 2904 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 40,422 psi | 63% | 2848 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 34,301 psi | 54% | 2713 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 96% | 42,757 psi | 67% | 2966 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,274 psi | 57% | 2762 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 39,610 psi | 62% | 2890 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,390 psi | 57% | 2795 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 110 powders for .25 WSSM loaded with the .257 | 95gr | Hammer HHT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,310 fps. Accurate 4350 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 51–90 %, leaving at least 10 % headroom. The 95.0 gr projectile in 0.257" calls for a 1:9.5 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, ReloadSwiss RS 60 rank at the top here: for .25 WSSM with the .257 | 95gr | Hammer HHT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-23, Alliant Reloder-26, Hodgdon H4350 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.