Load Specifications
Load data in caliber .264 Leroy N.E. with .264 | 93gr | Sax KJG-SR bullet and 96 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.
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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 56,942 psi | 89% | 3159 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 57,217 psi | 90% | 3274 fps | 99% |
| Accurate 2460 | <<locked>> | 86% | 55,738 psi | 87% | 3189 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,534 psi | 85% | 3173 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 57,435 psi | 90% | 3251 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 54,331 psi | 85% | 3219 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,543 psi | 73% | 3150 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 84% | 56,565 psi | 89% | 3104 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 56,942 psi | 89% | 3130 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 56,391 psi | 88% | 3261 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 57,000 psi | 89% | 3245 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 57,566 psi | 90% | 3238 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 55,564 psi | 87% | 3212 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 90% | 55,347 psi | 87% | 3196 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 56,956 psi | 89% | 3333 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 56,072 psi | 88% | 3379 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 56,463 psi | 88% | 3271 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 56,681 psi | 89% | 3173 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 57,319 psi | 90% | 3294 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,180 psi | 72% | 3156 fps | 97.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,911 psi | 84% | 3337 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 55,883 psi | 88% | 3094 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 56,333 psi | 88% | 3271 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 57,232 psi | 90% | 3291 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 57,740 psi | 90% | 3199 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,563 psi | 86% | 3241 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 56,246 psi | 88% | 3343 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 86% | 56,333 psi | 88% | 3219 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 57,493 psi | 90% | 3245 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,795 psi | 86% | 3238 fps | 98% |
| Hodgdon H4895 | <<locked>> | 92% | 56,898 psi | 89% | 3274 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,554 psi | 67% | 3031 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 55,506 psi | 87% | 3301 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,476 psi | 54% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,636 psi | 86% | 3215 fps | 99.5% |
| IMR 3031 | <<locked>> | 92% | 55,999 psi | 88% | 3261 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 56,710 psi | 89% | 3232 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 94% | 57,348 psi | 90% | 3202 fps | 96.2% |
| IMR 4198 | <<locked>> | 86% | 57,174 psi | 90% | 3133 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 56,623 psi | 89% | 3222 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,483 psi | 70% | 3087 fps | 96.6% |
| IMR 4895 | <<locked>> | 94% | 55,071 psi | 86% | 3274 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 90% | 55,564 psi | 87% | 3212 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 86% | 55,912 psi | 88% | 3199 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 55,463 psi | 87% | 3235 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 56,130 psi | 88% | 3179 fps | 99.4% |
| Lovex S062 | <<locked>> | 96% | 56,173 psi | 88% | 3232 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3150 fps | 96.6% |
| Norma 200 | <<locked>> | 82% | 56,623 psi | 89% | 3143 fps | 100% |
| Norma 201 | <<locked>> | 92% | 54,969 psi | 86% | 3202 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 55,274 psi | 87% | 3209 fps | 100% |
| Norma 203B | <<locked>> | 96% | 56,405 psi | 88% | 3281 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 46,456 psi | 73% | 3143 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 96% | 57,276 psi | 90% | 3307 fps | 99.5% |
| Ramshot TAC | <<locked>> | 90% | 56,289 psi | 88% | 3222 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 55,317 psi | 87% | 3245 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 56,927 psi | 89% | 3212 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,809 psi | 55% | 2018 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 54,998 psi | 86% | 3196 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 55,579 psi | 87% | 3212 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 57,551 psi | 90% | 3373 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 57,551 psi | 90% | 3409 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,383 psi | 73% | 3169 fps | 96.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,688 psi | 75% | 3189 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 90% | 55,941 psi | 88% | 3189 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 55,056 psi | 86% | 3192 fps | 99.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 3271 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,706 psi | 81% | 3150 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 92% | 55,463 psi | 87% | 3235 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 56,173 psi | 88% | 3232 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 54,969 psi | 86% | 3159 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 56,666 psi | 89% | 2831 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,302 psi | 85% | 3192 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 54,998 psi | 86% | 3281 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 57,696 psi | 90% | 3196 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,317 psi | 85% | 3192 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,708 psi | 86% | 3225 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 56,884 psi | 89% | 3143 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 56,898 psi | 89% | 3136 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 56,753 psi | 89% | 3248 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 56,159 psi | 88% | 3143 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 57,624 psi | 90% | 3248 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 57,043 psi | 89% | 3271 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,597 psi | 65% | 3087 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 88% | 56,898 psi | 89% | 3114 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 56,739 psi | 89% | 3127 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 57,711 psi | 90% | 3212 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 55,883 psi | 88% | 3182 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,361 psi | 87% | 3196 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 3146 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 90% | 56,144 psi | 88% | 3212 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 57,493 psi | 90% | 3225 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 48,298 psi | 76% | 3153 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,560 psi | 79% | 3136 fps | 99.3% |
| Winchester 748 | <<locked>> | 90% | 55,230 psi | 87% | 3258 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,491 psi | 85% | 3235 fps | 99.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 41,756 psi | 65% | 2910 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 53,505 psi | 84% | 3209 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 45,484 psi | 71% | 3015 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 34,389 psi | 54% | 2805 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,785 psi | 64% | 2963 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 32,518 psi | 51% | 2782 fps | 98.5% |
| Accurate 4350 | <<locked>> | 96% | 40,306 psi | 63% | 3022 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 50,024 psi | 78% | 3002 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,401 psi | 79% | 3025 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,305 psi | 60% | 2900 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 86% | 39,523 psi | 62% | 2910 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 50,386 psi | 79% | 3127 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,263 psi | 63% | 2920 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 80% | 39,421 psi | 62% | 2936 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,543 psi | 73% | 3143 fps | 98.6% |
| Alliant Power Pro 2000-MR | 39.6 gr | 84% | 39,537 psi | 62% | 3028 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,794 psi | 53% | 2812 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,094 psi | 74% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 39,088 psi | 61% | 2940 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 40,944 psi | 64% | 3035 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,926 psi | 56% | 2940 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,153 psi | 77% | 2989 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 40,016 psi | 63% | 2956 fps | 95.3% |
| Bofors RP3 | <<locked>> | 82% | 33,185 psi | 52% | 2808 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,453 psi | 67% | 2923 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,450 psi | 60% | 2930 fps | 98.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,206 psi | 66% | 3074 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 46,050 psi | 72% | 3051 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,992 psi | 74% | 3074 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 42,003 psi | 66% | 2992 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 38,537 psi | 60% | 2913 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,172 psi | 55% | 2854 fps | 95.4% |
| Hodgdon LEVERevolution | 37 gr | 80% | 34,606 psi | 54% | 2867 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 40% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,173 psi | 58% | 2864 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 37,376 psi | 59% | 2927 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 38,856 psi | 61% | 2887 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,201 psi | 85% | 3150 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 47,848 psi | 75% | 2989 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,113 psi | 83% | 3163 fps | 95.2% |
| IMR 4831 | <<locked>> | 98% | 41,524 psi | 65% | 3025 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 34,969 psi | 55% | 2851 fps | 95% |
| IMR 8208 XBR | <<locked>> | 80% | 40,263 psi | 63% | 2920 fps | 97.9% |
| Lovex D073.5 | <<locked>> | 80% | 45,252 psi | 71% | 3018 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 36,724 psi | 58% | 2881 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 39,175 psi | 61% | 2848 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 33,997 psi | 53% | 2782 fps | 96.2% |
| Lovex S065 | <<locked>> | 96% | 45,832 psi | 72% | 3038 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 53,417 psi | 84% | 3094 fps | 100% |
| Norma 201 | <<locked>> | 80% | 37,753 psi | 59% | 2861 fps | 97.3% |
| Norma 202 | <<locked>> | 80% | 37,782 psi | 59% | 2881 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 35,911 psi | 56% | 2864 fps | 95.3% |
| Norma URP | <<locked>> | 96% | 40,944 psi | 64% | 3025 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 37,942 psi | 59% | 2933 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 46,093 psi | 72% | 3035 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,566 psi | 62% | 2936 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,787 psi | 69% | 2972 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,904 psi | 41% | 1811 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,266 psi | 71% | 3025 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 48,863 psi | 77% | 3094 fps | 95.1% |
| ReloadSwiss RS 52 | 37.5 gr | 82% | 37,811 psi | 59% | 2982 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,457 psi | 46% | 2756 fps | 95.1% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 40,611 psi | 64% | 3045 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 44,411 psi | 70% | 3117 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 41,466 psi | 65% | 2927 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 35,897 psi | 56% | 2808 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 33,344 psi | 52% | 2802 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 45,832 psi | 72% | 3038 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,724 psi | 58% | 2881 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 33,997 psi | 53% | 2782 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 47,877 psi | 75% | 3038 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,882 psi | 84% | 2795 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,923 psi | 80% | 3136 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 36,985 psi | 58% | 2917 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 47,863 psi | 75% | 3041 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 43,961 psi | 69% | 2999 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,970 psi | 58% | 2864 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,233 psi | 61% | 2828 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,213 psi | 50% | 2674 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 43,308 psi | 68% | 3009 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 38,870 psi | 61% | 2835 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 37,942 psi | 59% | 2877 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 34,461 psi | 54% | 2815 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 31,952 psi | 50% | 2835 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 44,483 psi | 70% | 2920 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,334 psi | 62% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,592 psi | 54% | 2805 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 35,723 psi | 56% | 2808 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 30,647 psi | 48% | 2690 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 96% | 42,931 psi | 67% | 3025 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 40,234 psi | 63% | 2917 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 34,272 psi | 54% | 2785 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 42,003 psi | 66% | 3025 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,114 psi | 57% | 2831 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 39,305 psi | 62% | 2959 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,245 psi | 57% | 2867 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 96 powders for .264 Leroy N.E. loaded with the .264 | 93gr | Sax KJG-SR. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,409 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,409 fps. Accurate 4350 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 93.0 gr projectile in 0.264" 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, ReloadSwiss RS 52, Hodgdon LEVERevolution rank at the top here: for .264 Leroy N.E. with the .264 | 93gr | Sax KJG-SR 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.