Load Specifications
Bullet Manufacturer:Speer
Bullet Weight:123 gr
Bullet Diameter:0.31"
Bullet Length:<<locked>>
Caliber:.300 Norma Mag. load data
Case Length (l3):2.49"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:104 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:16.5
Load data in caliber .300 Norma Mag. with .310 | 123gr | Speer Gold Dot bullet and 88 powders. The key underlying parameters are shown in the table above.
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% | 55,869 psi | 88% | 3337 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,740 psi | 90% | 3392 fps | 97.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,488 psi | 81% | 3340 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 56,231 psi | 88% | 3389 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,305 psi | 90% | 3491 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 82% | 55,347 psi | 87% | 3422 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 56,463 psi | 88% | 3419 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,537 psi | 90% | 3425 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,825 psi | 87% | 3553 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,781 psi | 86% | 3448 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,276 psi | 90% | 3448 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,638 psi | 90% | 3474 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,740 psi | 90% | 3553 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,695 psi | 87% | 3524 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3507 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,312 psi | 76% | 3369 fps | 99.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 3589 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,405 psi | 87% | 3425 fps | 99.5% |
| Bofors RP3 | <<locked>> | 86% | 54,549 psi | 85% | 3402 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 54,244 psi | 85% | 3369 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 86% | 55,172 psi | 86% | 3415 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 92% | 55,898 psi | 88% | 3478 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 90% | 55,666 psi | 87% | 3432 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 82% | 55,956 psi | 88% | 3432 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,520 psi | 85% | 3409 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,144 psi | 88% | 3465 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,463 psi | 88% | 3510 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,056 psi | 56% | 2215 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,971 psi | 89% | 3432 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,434 psi | 88% | 3419 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,956 psi | 88% | 3406 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,259 psi | 87% | 3373 fps | 97.6% |
| IMR 4350 | <<locked>> | 94% | 55,071 psi | 86% | 3396 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,854 psi | 88% | 3402 fps | 97.6% |
| IMR 4831 | <<locked>> | 96% | 57,580 psi | 90% | 3478 fps | 99.7% |
| IMR 4895 | <<locked>> | 84% | 55,448 psi | 87% | 3445 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 82% | 57,537 psi | 90% | 3425 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,666 psi | 87% | 3389 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,580 psi | 90% | 3396 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,159 psi | 88% | 3399 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,898 psi | 88% | 3399 fps | 98.7% |
| Lovex S070 | <<locked>> | 94% | 57,290 psi | 90% | 3442 fps | 98.1% |
| Norma 201 | <<locked>> | 84% | 57,450 psi | 90% | 3419 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,549 psi | 85% | 3356 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,855 psi | 89% | 3458 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,130 psi | 88% | 3455 fps | 96% |
| Norma MRPᴾ | <<locked>> | 100% | 54,723 psi | 86% | 3530 fps | 97.6% |
| Norma URP | <<locked>> | 94% | 55,854 psi | 88% | 3471 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 84% | 54,027 psi | 85% | 3415 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 94% | 54,882 psi | 86% | 3458 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,651 psi | 57% | 2264 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,129 psi | 86% | 3389 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,752 psi | 86% | 3484 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,085 psi | 86% | 3524 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,406 psi | 90% | 3510 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,941 psi | 88% | 3537 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 54,534 psi | 85% | 3356 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,563 psi | 86% | 3399 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3484 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,244 psi | 85% | 3369 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,898 psi | 88% | 3399 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,666 psi | 87% | 3389 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,159 psi | 88% | 3399 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,290 psi | 90% | 3442 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,434 psi | 88% | 3461 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,811 psi | 89% | 3415 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,348 psi | 90% | 3442 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,708 psi | 86% | 3291 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,883 psi | 88% | 3291 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,883 psi | 88% | 3346 fps | 97.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,260 psi | 88% | 3481 fps | 96.4% |
| Somchem S335 | <<locked>> | 82% | 54,462 psi | 85% | 3284 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,391 psi | 88% | 3402 fps | 99.9% |
| Somchem S355 | <<locked>> | 88% | 54,534 psi | 85% | 3392 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,897 psi | 86% | 3474 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3461 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 55,201 psi | 87% | 3274 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,679 psi | 86% | 3323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,201 psi | 87% | 3333 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,086 psi | 88% | 3369 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,418 psi | 85% | 3406 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 86% | 57,319 psi | 90% | 3383 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,464 psi | 90% | 3471 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 3465 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,404 psi | 85% | 3366 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,086 psi | 88% | 3481 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,758 psi | 69% | 3402 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,969 psi | 85% | 3386 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 48,994 psi | 77% | 3222 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 50,444 psi | 79% | 3255 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 41,698 psi | 65% | 3136 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,325 psi | 73% | 3215 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 37,565 psi | 59% | 3071 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 51,692 psi | 81% | 3353 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 43,903 psi | 69% | 3166 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,795 psi | 84% | 3356 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,385 psi | 76% | 3406 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,242 psi | 80% | 3383 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,324 psi | 69% | 3202 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,268 psi | 74% | 3274 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 36,637 psi | 57% | 3081 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,928 psi | 61% | 3166 fps | 98% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,998 psi | 85% | 3438 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 32,460 psi | 51% | 2966 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 90% | 38,377 psi | 60% | 3189 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,634 psi | 81% | 3356 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 44,454 psi | 70% | 3205 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 47,616 psi | 75% | 3235 fps | 95.2% |
| Hodgdon H380 | <<locked>> | 80% | 44,976 psi | 70% | 3209 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 86% | 45,527 psi | 71% | 3264 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 52,011 psi | 82% | 3363 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 52,301 psi | 82% | 3366 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,792 psi | 50% | 2894 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,081 psi | 77% | 3333 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 48,588 psi | 76% | 3356 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 42% | 1985 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,082 psi | 78% | 3304 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 52,692 psi | 83% | 3360 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,151 psi | 72% | 3215 fps | 98.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,660 psi | 76% | 3241 fps | 96.1% |
| IMR 4350 | <<locked>> | 90% | 48,443 psi | 76% | 3268 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 46,325 psi | 73% | 3212 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 36,114 psi | 57% | 3015 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 48,501 psi | 76% | 3310 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 53,795 psi | 84% | 3356 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,924 psi | 81% | 3327 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,923 psi | 80% | 3274 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 46,398 psi | 73% | 3219 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 40,727 psi | 64% | 3081 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 44,295 psi | 69% | 3179 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 50,691 psi | 79% | 3297 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 51,271 psi | 80% | 3301 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,644 psi | 73% | 3261 fps | 99.1% |
| Norma 204 | <<locked>> | 92% | 52,301 psi | 82% | 3379 fps | 95% |
| Norma MRP | <<locked>> | 96% | 47,340 psi | 74% | 3376 fps | 95.7% |
| Norma URP | <<locked>> | 82% | 37,275 psi | 58% | 3064 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 47,094 psi | 74% | 3281 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 41,698 psi | 65% | 3182 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 43% | 2031 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,194 psi | 71% | 3189 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,966 psi | 80% | 3412 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,365 psi | 65% | 3245 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 37,333 psi | 59% | 3081 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 39,233 psi | 61% | 3159 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 48,254 psi | 76% | 3238 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 41,887 psi | 66% | 3140 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 98% | 53,026 psi | 83% | 3419 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 86% | 47,616 psi | 75% | 3235 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 40,727 psi | 64% | 3081 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,924 psi | 81% | 3327 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,398 psi | 73% | 3219 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 44,295 psi | 69% | 3179 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,960 psi | 67% | 3192 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,866 psi | 83% | 3346 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,386 psi | 79% | 3314 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,416 psi | 81% | 3235 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,352 psi | 68% | 3071 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,730 psi | 72% | 3146 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 52,533 psi | 82% | 3409 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,314 psi | 80% | 3228 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,489 psi | 82% | 3333 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 42,279 psi | 66% | 3143 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 31,430 psi | 49% | 2940 fps | 96.7% |
| Somchem S385 | <<locked>> | 94% | 47,108 psi | 74% | 3258 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 51,880 psi | 81% | 3222 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,138 psi | 75% | 3212 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,660 psi | 76% | 3219 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,379 psi | 63% | 3064 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 38,899 psi | 61% | 3074 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 80% | 47,021 psi | 74% | 3202 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 38,450 psi | 60% | 3071 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 35,926 psi | 56% | 3058 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,766 psi | 56% | 2969 fps | 97.4% |
| Winchester 760 | <<locked>> | 86% | 45,687 psi | 72% | 3271 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 30,922 psi | 48% | 2992 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,401 psi | 79% | 3320 fps | 99.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 88 powders for .300 Norma Mag. loaded with the .310 | 123gr | Speer Gold Dot. Alliant Reloder-26 delivers the highest muzzle velocity at 3,589 fps; across all powders the maximum-charge window runs from 2,215 fps to 3,589 fps. Accurate 3100 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.31" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-19, 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.