Load Specifications
Load data in caliber .264 Leroy N.E. with .264 | 90gr | Speer TNT bullet and 97 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 60 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 55,811 psi | 87% | 3212 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,389 psi | 85% | 3238 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 57,130 psi | 90% | 3278 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 54,143 psi | 85% | 3281 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 57,130 psi | 90% | 3327 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,081 psi | 77% | 3264 fps | 97.7% |
| Accurate LT-30 | <<locked>> | 82% | 54,868 psi | 86% | 3153 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,245 psi | 87% | 3179 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,781 psi | 86% | 3304 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 96% | 55,811 psi | 87% | 3297 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 82% | 55,970 psi | 88% | 3284 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 57,464 psi | 90% | 3314 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 57,537 psi | 90% | 3294 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,535 psi | 87% | 3383 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 54,462 psi | 85% | 3425 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,317 psi | 87% | 3323 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,506 psi | 87% | 3225 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 56,144 psi | 88% | 3346 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,341 psi | 76% | 3271 fps | 97.8% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3448 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,360 psi | 85% | 3140 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 54,592 psi | 86% | 3314 fps | 98.7% |
| Bofors RP3 | <<locked>> | 96% | 55,825 psi | 87% | 3337 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,883 psi | 88% | 3245 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,927 psi | 89% | 3350 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 54,839 psi | 86% | 3392 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 88% | 57,551 psi | 90% | 3310 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,492 psi | 87% | 3284 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 57,348 psi | 90% | 3350 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 98% | 54,375 psi | 85% | 3353 fps | 96.1% |
| Hodgdon H4198 | <<locked>> | 82% | 56,724 psi | 89% | 3205 fps | 100% |
| Hodgdon H4895 | <<locked>> | 90% | 55,259 psi | 87% | 3320 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,454 psi | 70% | 3140 fps | 98.3% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 54,389 psi | 85% | 3350 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,795 psi | 55% | 2037 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,579 psi | 87% | 3304 fps | 99.6% |
| IMR 3031 | <<locked>> | 94% | 56,318 psi | 88% | 3337 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 57,566 psi | 90% | 3317 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 98% | 57,508 psi | 90% | 3281 fps | 96.4% |
| IMR 4198 | <<locked>> | 84% | 55,477 psi | 87% | 3182 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,071 psi | 86% | 3271 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 41,423 psi | 65% | 3084 fps | 95.9% |
| IMR 4895 | <<locked>> | 94% | 57,580 psi | 90% | 3386 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 90% | 57,464 psi | 90% | 3314 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 54,331 psi | 85% | 3245 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,143 psi | 85% | 3281 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,969 psi | 86% | 3232 fps | 99.4% |
| Lovex S062 | <<locked>> | 94% | 54,839 psi | 86% | 3281 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3258 fps | 97.2% |
| Norma 201 | <<locked>> | 92% | 56,942 psi | 89% | 3304 fps | 99.9% |
| Norma 202 | <<locked>> | 92% | 57,682 psi | 90% | 3314 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,288 psi | 87% | 3333 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 48,762 psi | 76% | 3255 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 94% | 56,014 psi | 88% | 3360 fps | 99.4% |
| Ramshot TAC | <<locked>> | 88% | 54,592 psi | 86% | 3264 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 57,537 psi | 90% | 3353 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,492 psi | 87% | 3261 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,099 psi | 55% | 2087 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 57,101 psi | 89% | 3301 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,418 psi | 85% | 3268 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 56,434 psi | 88% | 3425 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 55,970 psi | 88% | 3458 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,052 psi | 77% | 3287 fps | 97.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 3307 fps | 96.9% |
| Rottweil R 901 | <<locked>> | 88% | 54,520 psi | 85% | 3241 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 57,319 psi | 90% | 3297 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 55,695 psi | 87% | 3327 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,056 psi | 85% | 3258 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,143 psi | 85% | 3281 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,839 psi | 86% | 3281 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 57,261 psi | 90% | 3268 fps | 99.9% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,405 psi | 88% | 3297 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 53,940 psi | 85% | 3333 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,115 psi | 88% | 3245 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,521 psi | 89% | 3301 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,942 psi | 89% | 3330 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,448 psi | 87% | 3192 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,405 psi | 87% | 3182 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 54,679 psi | 86% | 3205 fps | 95.9% |
| Somchem S321 | <<locked>> | 86% | 55,405 psi | 87% | 3297 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 54,665 psi | 86% | 3189 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,782 psi | 87% | 3291 fps | 99.4% |
| Somchem S355 | <<locked>> | 98% | 56,144 psi | 88% | 3323 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,613 psi | 68% | 3199 fps | 99.3% |
| Unknown powderᴾ | <<locked>> | 100% | 53,461 psi | 84% | 3330 fps | 97.8% |
| Vihtavuori N130 | <<locked>> | 86% | 55,114 psi | 86% | 3159 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,463 psi | 87% | 3179 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,578 psi | 86% | 3232 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,346 psi | 85% | 3251 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,343 psi | 80% | 3255 fps | 97.9% |
| Vihtavuori N530 | <<locked>> | 88% | 54,520 psi | 85% | 3258 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 94% | 56,492 psi | 89% | 3281 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 3264 fps | 97.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,649 psi | 83% | 3241 fps | 99.6% |
| Winchester 748 | <<locked>> | 86% | 54,723 psi | 86% | 3320 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,375 psi | 85% | 3353 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,766 psi | 86% | 3310 fps | 99.7% |
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% | 43,453 psi | 68% | 3005 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,369 psi | 74% | 3117 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,984 psi | 56% | 2900 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 41,147 psi | 64% | 3041 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 33,982 psi | 53% | 2874 fps | 98.8% |
| Accurate 4350 | <<locked>> | 94% | 39,740 psi | 62% | 3068 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 51,605 psi | 81% | 3097 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 51,953 psi | 81% | 3123 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 39,871 psi | 62% | 3002 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 38,392 psi | 60% | 2946 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 52,170 psi | 82% | 3225 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 41,887 psi | 66% | 3022 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 80% | 41,220 psi | 65% | 3035 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,544 psi | 76% | 3255 fps | 99% |
| Alliant Power Pro 2000-MR | 42.2 gr | 84% | 41,365 psi | 65% | 3143 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,141 psi | 52% | 2851 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 48,994 psi | 77% | 3120 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 38,029 psi | 60% | 2979 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 39,987 psi | 63% | 3077 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,012 psi | 55% | 2979 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,995 psi | 80% | 3087 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 38,957 psi | 61% | 2995 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 32,489 psi | 51% | 2844 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 43,787 psi | 69% | 3022 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,422 psi | 63% | 3038 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,150 psi | 69% | 3186 fps | 97.3% |
| Hodgdon H322 | <<locked>> | 80% | 44,295 psi | 69% | 3084 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,532 psi | 81% | 3219 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 41,060 psi | 64% | 3035 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 51,024 psi | 80% | 3291 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 53,345 psi | 84% | 3153 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 40,147 psi | 63% | 3018 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,301 psi | 54% | 2894 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,968 psi | 53% | 2910 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,759 psi | 40% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,868 psi | 56% | 2894 fps | 95.9% |
| IMR 3031 | <<locked>> | 80% | 35,752 psi | 56% | 2946 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 37,623 psi | 59% | 2920 fps | 95.4% |
| IMR 4166 Enduron | <<locked>> | 94% | 51,024 psi | 80% | 3166 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 49,255 psi | 77% | 3084 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,851 psi | 81% | 3212 fps | 95.1% |
| IMR 4831 | <<locked>> | 98% | 38,856 psi | 61% | 3028 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 36,535 psi | 57% | 2953 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 41,887 psi | 66% | 3022 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 47,065 psi | 74% | 3117 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 38,609 psi | 61% | 2986 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 40,480 psi | 63% | 2946 fps | 96.8% |
| Lovex S062 | <<locked>> | 80% | 35,375 psi | 55% | 2881 fps | 96.7% |
| Lovex S065 | <<locked>> | 94% | 44,788 psi | 70% | 3081 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 39,117 psi | 61% | 2956 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 39,175 psi | 61% | 2976 fps | 99.4% |
| Norma 203B | <<locked>> | 80% | 35,099 psi | 55% | 2907 fps | 95.1% |
| Norma URP | <<locked>> | 94% | 40,045 psi | 63% | 3068 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 37,173 psi | 58% | 2976 fps | 95.6% |
| Ramshot TAC | <<locked>> | 82% | 44,904 psi | 70% | 3077 fps | 95.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,118 psi | 64% | 3038 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,295 psi | 71% | 3071 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,136 psi | 41% | 1870 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 46,891 psi | 73% | 3123 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,558 psi | 75% | 3140 fps | 95% |
| ReloadSwiss RS 52 | 38.9 gr | 80% | 36,825 psi | 58% | 3018 fps | 95% |
| ReloadSwiss RS 60 | 39.5 gr | 80% | 30,472 psi | 48% | 2851 fps | 95.9% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 42,525 psi | 67% | 3153 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 46,543 psi | 73% | 3238 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 42,786 psi | 67% | 3022 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 37,289 psi | 58% | 2904 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 32,634 psi | 51% | 2841 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 94% | 44,788 psi | 70% | 3081 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,609 psi | 61% | 2986 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 35,375 psi | 55% | 2881 fps | 96.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,922 psi | 78% | 3146 fps | 99.3% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,765 psi | 83% | 3238 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,289 psi | 57% | 2959 fps | 95.3% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 49,777 psi | 78% | 3143 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 42,946 psi | 67% | 3045 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,363 psi | 60% | 2959 fps | 96.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 40,727 psi | 64% | 2927 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,547 psi | 53% | 2769 fps | 99.1% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 51,271 psi | 80% | 3146 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 45,252 psi | 71% | 3114 fps | 99.1% |
| Somchem S335 | <<locked>> | 80% | 40,219 psi | 63% | 2927 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 39,726 psi | 62% | 2979 fps | 96.5% |
| Somchem S355 | <<locked>> | 82% | 33,736 psi | 53% | 2854 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 31,473 psi | 49% | 2881 fps | 95.6% |
| Unknown powder | <<locked>> | 94% | 43,961 psi | 69% | 3143 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 46,151 psi | 72% | 3015 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,915 psi | 64% | 2930 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,057 psi | 58% | 2900 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 29,994 psi | 47% | 2726 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 42,163 psi | 66% | 3074 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 41,800 psi | 66% | 3015 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 80% | 35,650 psi | 56% | 2881 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 41,539 psi | 65% | 3077 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,143 psi | 55% | 2867 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 44,425 psi | 70% | 3133 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 51,024 psi | 80% | 3291 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,108 psi | 74% | 3169 fps | 98.8% |
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 97 powders for .264 Leroy N.E. loaded with the .264 | 90gr | Speer TNT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,458 fps; across all powders the maximum-charge window runs from 2,037 fps to 3,458 fps. Accurate 4350 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.264" calls for a 1:12.5 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 60, ReloadSwiss RS 52 rank at the top here: for .264 Leroy N.E. with the .264 | 90gr | Speer TNT 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.