Load Specifications
Load data in caliber .300 Rem. Ultra Mag. with .308 | 115gr | Berger Target FB bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, Norma MRP and ReloadSwiss RS 70.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 57,072 psi | 88% | 3291 fps | 98.3% |
| Accurate 3100 | <<locked>> | 98% | 58,233 psi | 90% | 3333 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 56,623 psi | 87% | 3294 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,897 psi | 84% | 3333 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 84% | 56,246 psi | 87% | 3323 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,260 psi | 87% | 3376 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 98% | 58,189 psi | 90% | 3428 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,508 psi | 89% | 3350 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,377 psi | 88% | 3369 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,608 psi | 86% | 3402 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,217 psi | 88% | 3422 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,811 psi | 86% | 3360 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 57,856 psi | 89% | 3422 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 58,711 psi | 90% | 3409 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,836 psi | 78% | 3323 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,637 psi | 86% | 3428 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 56,753 psi | 87% | 3399 fps | 97.8% |
| Bofors RP3 | <<locked>> | 84% | 58,711 psi | 90% | 3363 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 57,856 psi | 89% | 3422 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 57,812 psi | 89% | 3340 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 55,085 psi | 85% | 3317 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 56,985 psi | 88% | 3383 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 86% | 56,028 psi | 86% | 3343 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 96% | 58,131 psi | 89% | 3363 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,072 psi | 86% | 3314 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,777 psi | 77% | 3360 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 88% | 58,305 psi | 90% | 3415 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,347 psi | 56% | 2257 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,550 psi | 85% | 3307 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,986 psi | 89% | 3333 fps | 98.9% |
| IMR 4350 | <<locked>> | 90% | 55,825 psi | 86% | 3310 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,738 psi | 86% | 3310 fps | 98.6% |
| IMR 4831 | <<locked>> | 90% | 55,390 psi | 85% | 3323 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 98% | 55,695 psi | 86% | 3392 fps | 96.4% |
| Lovex S062 | <<locked>> | 82% | 55,811 psi | 86% | 3301 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,217 psi | 87% | 3307 fps | 99.5% |
| Lovex S070 | <<locked>> | 90% | 57,957 psi | 89% | 3353 fps | 99.1% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,300 psi | 79% | 3222 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 56,681 psi | 87% | 3353 fps | 100% |
| Norma 204 | <<locked>> | 90% | 57,087 psi | 88% | 3363 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 57,856 psi | 89% | 3448 fps | 99.1% |
| Norma URP | <<locked>> | 90% | 57,101 psi | 88% | 3376 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 58,349 psi | 90% | 3373 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,449 psi | 87% | 3406 fps | 97% |
| Ramshot Hunter | <<locked>> | 90% | 56,333 psi | 87% | 3369 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,463 psi | 85% | 3340 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,086 psi | 57% | 2310 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,926 psi | 85% | 3291 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,362 psi | 87% | 3415 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 55,259 psi | 85% | 3350 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,754 psi | 89% | 3442 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,995 psi | 78% | 3360 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 82% | 57,609 psi | 89% | 3317 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 55,013 psi | 85% | 3301 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,638 psi | 89% | 3340 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 94% | 55,085 psi | 85% | 3340 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 88% | 57,812 psi | 89% | 3340 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,217 psi | 87% | 3307 fps | 99.5% |
| Shooters World Precision | <<locked>> | 82% | 55,811 psi | 86% | 3301 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,957 psi | 89% | 3353 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,000 psi | 88% | 3363 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,259 psi | 85% | 3186 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,912 psi | 86% | 3248 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 58,436 psi | 90% | 3399 fps | 98.1% |
| Somchem S355 | <<locked>> | 86% | 58,595 psi | 90% | 3353 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 57,464 psi | 88% | 3379 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,869 psi | 86% | 3314 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 58,088 psi | 89% | 3278 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 58,610 psi | 90% | 3284 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 56,376 psi | 87% | 3268 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,332 psi | 85% | 3310 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 98% | 55,593 psi | 86% | 3284 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 56,985 psi | 88% | 3271 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 58,537 psi | 90% | 3369 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,942 psi | 88% | 3379 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 57,682 psi | 89% | 3432 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,680 psi | 86% | 3261 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,203 psi | 88% | 3389 fps | 98.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,318 psi | 87% | 3481 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,130 psi | 86% | 3304 fps | 97.6% |
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 2700 | <<locked>> | 80% | 53,200 psi | 82% | 3225 fps | 97.6% |
| Accurate 3100 | <<locked>> | 86% | 37,753 psi | 58% | 2943 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 52,910 psi | 81% | 3238 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,176 psi | 63% | 3071 fps | 97.8% |
| ADI AR 2208 | <<locked>> | 80% | 49,371 psi | 76% | 3205 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 48,878 psi | 75% | 3238 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 54,215 psi | 83% | 3356 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,415 psi | 78% | 3235 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,809 psi | 83% | 3314 fps | 99.9% |
| Alliant Reloder-16 | 77.5 gr | 80% | 39,421 psi | 61% | 3081 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,585 psi | 70% | 3222 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 48,646 psi | 75% | 3228 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 46,760 psi | 72% | 3215 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 31,299 psi | 48% | 2848 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 35,998 psi | 55% | 2982 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 82% | 34,534 psi | 53% | 2979 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 46,108 psi | 71% | 3202 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,184 psi | 79% | 3245 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 46,760 psi | 72% | 3215 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 44,498 psi | 68% | 3091 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,430 psi | 79% | 3255 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 42,989 psi | 66% | 3117 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 80% | 45,614 psi | 70% | 3146 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 94% | 54,143 psi | 83% | 3294 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,043 psi | 57% | 2959 fps | 98.3% |
| Hodgdon Retumbo | <<locked>> | 98% | 46,383 psi | 71% | 3287 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 42,612 psi | 66% | 3120 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,093 psi | 42% | 2037 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,909 psi | 80% | 3248 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,288 psi | 84% | 3274 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 42,859 psi | 66% | 3061 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,876 psi | 71% | 3123 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 39,218 psi | 60% | 3012 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 96% | 51,837 psi | 80% | 3320 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 52,388 psi | 81% | 3245 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,352 psi | 67% | 3068 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 41,727 psi | 64% | 3041 fps | 95.5% |
| Lovex S071 | <<locked>> | 92% | 39,131 psi | 60% | 2976 fps | 95.6% |
| Norma 203B | <<locked>> | 80% | 53,185 psi | 82% | 3297 fps | 100% |
| Norma 204 | <<locked>> | 86% | 49,516 psi | 76% | 3228 fps | 95.8% |
| Norma MRP | 91.3 gr | 88% | 42,859 psi | 66% | 3159 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,553 psi | 62% | 3061 fps | 97.5% |
| Ramshot Big Game | <<locked>> | 80% | 54,186 psi | 83% | 3310 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,402 psi | 81% | 3333 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 39,653 psi | 61% | 3038 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 94% | 43,714 psi | 67% | 3117 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,543 psi | 42% | 2083 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,372 psi | 79% | 3228 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,399 psi | 74% | 3287 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,249 psi | 63% | 3081 fps | 97.6% |
| ReloadSwiss RS 70 | 84.7 gr | 80% | 39,726 psi | 61% | 3087 fps | 96.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 40,567 psi | 62% | 3120 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 54,056 psi | 83% | 3261 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,066 psi | 74% | 3182 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 53,882 psi | 83% | 3278 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 90% | 47,805 psi | 74% | 3209 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,498 psi | 68% | 3091 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,352 psi | 67% | 3068 fps | 97.2% |
| Shooters World Precision | <<locked>> | 80% | 52,388 psi | 81% | 3245 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,727 psi | 64% | 3041 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,632 psi | 76% | 3238 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,530 psi | 75% | 3087 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,569 psi | 66% | 3002 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 47,384 psi | 73% | 3202 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,037 psi | 74% | 3182 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 37,115 psi | 57% | 3009 fps | 99.3% |
| Somchem S385 | <<locked>> | 86% | 42,438 psi | 65% | 3061 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 54,360 psi | 84% | 3225 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,810 psi | 84% | 3232 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,050 psi | 71% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,018 psi | 65% | 3061 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 92% | 45,049 psi | 69% | 3094 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 53,374 psi | 82% | 3219 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,640 psi | 64% | 3061 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 32,489 psi | 50% | 2874 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 94% | 53,577 psi | 82% | 3360 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,510 psi | 64% | 3018 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 43,134 psi | 66% | 3120 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 27,920 psi | 43% | 2802 fps | 95% |
| Winchester Supreme 780 | <<locked>> | 92% | 48,602 psi | 75% | 3169 fps | 95.8% |
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 93 powders for .300 Rem. Ultra Mag. loaded with the .308 | 115gr | Berger Target FB. Winchester StaBALL HD delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,257 fps to 3,481 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 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. The 115.0 gr projectile in 0.308" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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-16, Norma MRP, ReloadSwiss RS 70 rank at the top here: for .300 Rem. Ultra Mag. with the .308 | 115gr | Berger Target FB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 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.