Load Specifications
Bullet Manufacturer:Cutting Edge
Bullet Weight:100 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 Rem. Ultra Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:112.5 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:64,977 psi
Load data in caliber .300 Rem. Ultra Mag. with .308 | 100gr | CutEdge ESP Raptor 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 Reloder-26, Alliant Reloder-16 and Winchester 760.
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 2495 | <<locked>> | 84% | 56,231 psi | 87% | 3412 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,752 psi | 84% | 3392 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,795 psi | 83% | 3406 fps | 98.3% |
| Accurate 4064 | <<locked>> | 86% | 56,768 psi | 87% | 3465 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,042 psi | 85% | 3491 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 82% | 55,898 psi | 86% | 3504 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 57,682 psi | 89% | 3504 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 98% | 57,116 psi | 88% | 3533 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 58,160 psi | 90% | 3507 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 57,435 psi | 88% | 3629 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,188 psi | 88% | 3524 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 58,450 psi | 90% | 3527 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 58,566 psi | 90% | 3550 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,985 psi | 86% | 3566 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 58,001 psi | 89% | 3599 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,376 psi | 87% | 3510 fps | 96.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,896 psi | 83% | 3497 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,444 psi | 78% | 3435 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,961 psi | 68% | 3317 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,390 psi | 85% | 3579 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,652 psi | 87% | 3501 fps | 99.6% |
| Bofors RP3 | <<locked>> | 86% | 55,521 psi | 85% | 3474 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,896 psi | 83% | 3497 fps | 96.1% |
| Bofors RP7 | <<locked>> | 90% | 55,245 psi | 85% | 3445 fps | 97% |
| Hodgdon H380 | <<locked>> | 86% | 56,304 psi | 87% | 3491 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 92% | 57,899 psi | 89% | 3550 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 90% | 57,101 psi | 88% | 3507 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 56,521 psi | 87% | 3514 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,434 psi | 87% | 3478 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,522 psi | 89% | 3543 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,926 psi | 85% | 3507 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,607 psi | 55% | 2379 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,957 psi | 89% | 3517 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,855 psi | 88% | 3504 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,855 psi | 88% | 3488 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,188 psi | 86% | 3455 fps | 97.7% |
| IMR 4350 | <<locked>> | 94% | 56,898 psi | 88% | 3471 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,159 psi | 88% | 3481 fps | 97.8% |
| IMR 4831 | <<locked>> | 94% | 55,811 psi | 86% | 3484 fps | 99.6% |
| IMR 4895 | <<locked>> | 84% | 56,275 psi | 87% | 3527 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 58,160 psi | 90% | 3507 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 56,594 psi | 87% | 3468 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 58,204 psi | 90% | 3481 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,753 psi | 87% | 3478 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,043 psi | 88% | 3474 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 54,969 psi | 85% | 3448 fps | 97.8% |
| Norma 201 | <<locked>> | 84% | 58,088 psi | 89% | 3501 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,172 psi | 85% | 3445 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,798 psi | 89% | 3537 fps | 100% |
| Norma 204 | <<locked>> | 94% | 58,392 psi | 90% | 3527 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 58,001 psi | 89% | 3599 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 57,769 psi | 89% | 3543 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 55,390 psi | 85% | 3488 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 57,159 psi | 88% | 3530 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 55% | 2428 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,333 psi | 87% | 3465 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,651 psi | 86% | 3563 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,087 psi | 88% | 3596 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,564 psi | 86% | 3504 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 58,798 psi | 90% | 3609 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 58,160 psi | 90% | 3488 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 58,784 psi | 90% | 3497 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,564 psi | 86% | 3468 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 55,259 psi | 85% | 3491 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 90% | 55,245 psi | 85% | 3445 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,043 psi | 88% | 3474 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,594 psi | 87% | 3468 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,753 psi | 87% | 3478 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,969 psi | 85% | 3448 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 58,030 psi | 89% | 3537 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,957 psi | 89% | 3494 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 58,494 psi | 90% | 3520 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,027 psi | 85% | 3383 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,652 psi | 87% | 3373 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,319 psi | 88% | 3415 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,781 psi | 84% | 3484 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 58,711 psi | 90% | 3422 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,580 psi | 89% | 3474 fps | 99.9% |
| Somchem S355 | <<locked>> | 88% | 55,564 psi | 86% | 3471 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,319 psi | 88% | 3540 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,159 psi | 86% | 3461 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,535 psi | 85% | 3366 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,201 psi | 85% | 3409 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,130 psi | 86% | 3415 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,493 psi | 88% | 3445 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,072 psi | 86% | 3474 fps | 99.5% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,938 psi | 80% | 3360 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 86% | 58,566 psi | 90% | 3458 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,521 psi | 85% | 3474 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,376 psi | 87% | 3527 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,971 psi | 88% | 3432 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,899 psi | 89% | 3550 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,006 psi | 71% | 3474 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,042 psi | 85% | 3465 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,145 psi | 88% | 3458 fps | 96.6% |
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 2495 | <<locked>> | 80% | 48,689 psi | 75% | 3297 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 51,111 psi | 79% | 3327 fps | 95.8% |
| Accurate 3100 | <<locked>> | 94% | 43,047 psi | 66% | 3199 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 46,050 psi | 71% | 3287 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 37,695 psi | 58% | 3133 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 52,141 psi | 80% | 3438 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 44,092 psi | 68% | 3251 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 96% | 53,113 psi | 82% | 3461 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,273 psi | 84% | 3445 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,342 psi | 76% | 3484 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,229 psi | 82% | 3451 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,512 psi | 69% | 3278 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,601 psi | 73% | 3353 fps | 98.7% |
| Alliant Reloder-16 | 78.2 gr | 82% | 36,796 psi | 57% | 3150 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,465 psi | 61% | 3238 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,460 psi | 81% | 3442 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 50,067 psi | 77% | 3425 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,924 psi | 51% | 3028 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 98% | 41,017 psi | 63% | 3241 fps | 95.8% |
| Alliant Reloder-26 | 94.8 gr | 90% | 39,943 psi | 61% | 3258 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,678 psi | 81% | 3435 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 44,773 psi | 69% | 3281 fps | 99.3% |
| Bofors RP5 | <<locked>> | 98% | 50,067 psi | 77% | 3425 fps | 95% |
| Bofors RP7 | <<locked>> | 86% | 48,341 psi | 74% | 3314 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 45,440 psi | 70% | 3287 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 46,514 psi | 72% | 3337 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 53,243 psi | 82% | 3438 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 52,707 psi | 81% | 3451 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 34,113 psi | 53% | 3025 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,705 psi | 76% | 3412 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 46,818 psi | 72% | 3350 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 41% | 2152 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,589 psi | 78% | 3392 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 53,026 psi | 82% | 3448 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,325 psi | 71% | 3297 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,994 psi | 75% | 3323 fps | 96% |
| IMR 4350 | <<locked>> | 90% | 49,719 psi | 77% | 3343 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,876 psi | 72% | 3287 fps | 95.3% |
| IMR 4831 | <<locked>> | 84% | 38,972 psi | 60% | 3146 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 48,892 psi | 75% | 3396 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 54,273 psi | 84% | 3445 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,489 psi | 81% | 3402 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,140 psi | 79% | 3360 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 46,427 psi | 71% | 3297 fps | 99.6% |
| Lovex S065 | <<locked>> | 82% | 40,988 psi | 63% | 3156 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 44,875 psi | 69% | 3255 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,705 psi | 78% | 3379 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 51,619 psi | 79% | 3386 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,978 psi | 72% | 3340 fps | 99% |
| Norma 204 | <<locked>> | 92% | 54,114 psi | 83% | 3451 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 46,079 psi | 71% | 3373 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 37,623 psi | 58% | 3136 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,921 psi | 74% | 3353 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 42,743 psi | 66% | 3248 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,701 psi | 41% | 2198 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,629 psi | 70% | 3261 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,721 psi | 80% | 3491 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,047 psi | 65% | 3320 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,869 psi | 58% | 3146 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 40,103 psi | 62% | 3228 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 54,462 psi | 84% | 3432 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,138 psi | 74% | 3320 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 41,872 psi | 64% | 3212 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 96% | 51,474 psi | 79% | 3422 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 48,341 psi | 74% | 3314 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,988 psi | 63% | 3156 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,489 psi | 81% | 3402 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,427 psi | 71% | 3297 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 86% | 44,875 psi | 69% | 3255 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,511 psi | 67% | 3271 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,824 psi | 83% | 3422 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,010 psi | 79% | 3396 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,605 psi | 79% | 3330 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,468 psi | 67% | 3156 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 46,427 psi | 71% | 3219 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,024 psi | 79% | 3412 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,416 psi | 79% | 3314 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,548 psi | 82% | 3412 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 42,235 psi | 65% | 3215 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 31,386 psi | 48% | 2999 fps | 96.3% |
| Somchem S385 | <<locked>> | 94% | 48,776 psi | 75% | 3327 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,141 psi | 80% | 3317 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,225 psi | 74% | 3301 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,950 psi | 75% | 3304 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,524 psi | 62% | 3140 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 39,218 psi | 60% | 3140 fps | 95.8% |
| Vihtavuori N165 | <<locked>> | 98% | 48,414 psi | 75% | 3294 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 47,659 psi | 73% | 3284 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 38,899 psi | 60% | 3140 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 88% | 36,506 psi | 56% | 3120 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,347 psi | 56% | 3038 fps | 97.5% |
| Winchester 760 | 86.5 gr | 86% | 46,673 psi | 72% | 3340 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 90% | 31,618 psi | 49% | 3054 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,140 psi | 79% | 3399 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,953 psi | 81% | 3386 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 95 powders for .300 Rem. Ultra Mag. loaded with the .308 | 100gr | CutEdge ESP Raptor. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,629 fps; across all powders the maximum-charge window runs from 2,379 fps to 3,629 fps. Accurate 3100 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 (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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 Reloder-26, Alliant Reloder-16, Winchester 760 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 100gr | CutEdge ESP Raptor 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.