Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:115 gr
Bullet Diameter:0.308"
Bullet Length:<<locked>>
Caliber:.300 H&H Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:85.9 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:14.5
Load data in caliber .300 H&H Mag. with .308 | 115gr | Sierra VarmintKing bullet and 89 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 2015 | <<locked>> | 86% | 53,809 psi | 86% | 3294 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,970 psi | 90% | 3366 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,506 psi | 89% | 3356 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,172 psi | 87% | 3369 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,216 psi | 89% | 3396 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,474 psi | 83% | 3386 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 82% | 55,941 psi | 90% | 3284 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,333 psi | 90% | 3310 fps | 100% |
| ADI AR 2206H | <<locked>> | 88% | 52,910 psi | 85% | 3366 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 94% | 53,998 psi | 87% | 3363 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,506 psi | 89% | 3386 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 88% | 55,695 psi | 89% | 3379 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,447 psi | 86% | 3445 fps | 98.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,289 psi | 90% | 3550 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,635 psi | 86% | 3389 fps | 99.2% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,156 psi | 85% | 3301 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,418 psi | 87% | 3412 fps | 98.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,835 psi | 80% | 3386 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,549 psi | 87% | 3507 fps | 99.2% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,695 psi | 89% | 3268 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 52,721 psi | 85% | 3369 fps | 97.5% |
| Bofors RP3 | <<locked>> | 94% | 54,230 psi | 87% | 3406 fps | 99.3% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,085 psi | 87% | 3317 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,781 psi | 88% | 3409 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,649 psi | 84% | 3445 fps | 98% |
| Hodgdon H322 | <<locked>> | 84% | 56,115 psi | 90% | 3399 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,606 psi | 86% | 3356 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,448 psi | 89% | 3412 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 88% | 53,417 psi | 86% | 3383 fps | 98.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,137 psi | 74% | 3251 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,318 psi | 90% | 3478 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,809 psi | 56% | 2149 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,882 psi | 88% | 3389 fps | 99.1% |
| IMR 3031 | <<locked>> | 90% | 56,289 psi | 90% | 3442 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,505 psi | 86% | 3350 fps | 98.2% |
| IMR 4198 | <<locked>> | 82% | 53,272 psi | 85% | 3268 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,762 psi | 78% | 3314 fps | 96.6% |
| IMR 4895 | <<locked>> | 92% | 55,796 psi | 89% | 3451 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 88% | 55,506 psi | 89% | 3386 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 84% | 55,927 psi | 90% | 3373 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 56,014 psi | 90% | 3409 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,217 psi | 90% | 3356 fps | 98.9% |
| Lovex S062 | <<locked>> | 94% | 56,405 psi | 90% | 3406 fps | 99.6% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 3383 fps | 96.6% |
| Norma 201 | <<locked>> | 90% | 54,984 psi | 88% | 3373 fps | 99.5% |
| Norma 202 | <<locked>> | 90% | 55,535 psi | 89% | 3386 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,592 psi | 86% | 3396 fps | 98.6% |
| Norma URPᴾ | <<locked>> | 100% | 50,850 psi | 82% | 3376 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 92% | 54,172 psi | 87% | 3419 fps | 98.6% |
| Ramshot TAC | <<locked>> | 88% | 56,318 psi | 90% | 3389 fps | 96.8% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,651 psi | 89% | 3415 fps | 98.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,127 psi | 85% | 3317 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,186 psi | 56% | 2198 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,114 psi | 88% | 3373 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 56,028 psi | 90% | 3386 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,317 psi | 87% | 3478 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,433 psi | 87% | 3524 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,169 psi | 82% | 3399 fps | 96.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,808 psi | 83% | 3425 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 88% | 56,057 psi | 90% | 3373 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,477 psi | 89% | 3369 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 96% | 53,809 psi | 86% | 3389 fps | 99.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,912 psi | 90% | 3383 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 90% | 56,014 psi | 90% | 3409 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,405 psi | 90% | 3406 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,708 psi | 88% | 3330 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,912 psi | 90% | 3458 fps | 98.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,128 psi | 87% | 3330 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,360 psi | 87% | 3356 fps | 97% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,795 psi | 88% | 3392 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,519 psi | 86% | 3271 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,548 psi | 86% | 3261 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 53,388 psi | 86% | 3360 fps | 99.5% |
| Somchem S335 | <<locked>> | 90% | 56,043 psi | 90% | 3317 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,824 psi | 86% | 3353 fps | 98.5% |
| Somchem S355 | <<locked>> | 96% | 54,520 psi | 87% | 3392 fps | 99% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,353 psi | 73% | 3310 fps | 98.8% |
| Vihtavuori N130 | <<locked>> | 84% | 53,214 psi | 85% | 3245 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,577 psi | 86% | 3261 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,839 psi | 88% | 3350 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 56,115 psi | 90% | 3360 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,130 psi | 90% | 3373 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 3379 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 88% | 56,101 psi | 90% | 3386 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 92% | 54,389 psi | 87% | 3346 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,678 psi | 84% | 3379 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,737 psi | 88% | 3363 fps | 99.3% |
| Winchester 748 | <<locked>> | 88% | 55,666 psi | 89% | 3435 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,781 psi | 88% | 3402 fps | 99.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,353 psi | 71% | 3123 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,588 psi | 78% | 3235 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 37,014 psi | 59% | 3002 fps | 99.8% |
| Accurate 2520 | <<locked>> | 80% | 43,787 psi | 70% | 3173 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 34,983 psi | 56% | 2972 fps | 98% |
| Accurate 4350 | <<locked>> | 96% | 44,483 psi | 71% | 3245 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 52,634 psi | 84% | 3232 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,982 psi | 85% | 3255 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 40,915 psi | 66% | 3110 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 86% | 42,119 psi | 68% | 3114 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,960 psi | 69% | 3133 fps | 97.5% |
| Alliant AR-Comp | <<locked>> | 80% | 42,424 psi | 68% | 3150 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,893 psi | 80% | 3376 fps | 98.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 45,701 psi | 73% | 3327 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,405 psi | 58% | 3009 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,125 psi | 80% | 3251 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 41,814 psi | 67% | 3146 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 96% | 44,092 psi | 71% | 3255 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 38,740 psi | 62% | 3146 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,156 psi | 84% | 3212 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,989 psi | 69% | 3166 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 35,897 psi | 58% | 3005 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,860 psi | 72% | 3136 fps | 98.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,452 psi | 66% | 3140 fps | 97.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,571 psi | 73% | 3297 fps | 96.3% |
| Hodgdon H322 | <<locked>> | 80% | 48,950 psi | 78% | 3274 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,995 psi | 80% | 3291 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 48,457 psi | 78% | 3278 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 41,234 psi | 66% | 3123 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 37,956 psi | 61% | 3061 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,144 psi | 60% | 3068 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,788 psi | 41% | 1926 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,610 psi | 64% | 3068 fps | 95.8% |
| IMR 3031 | <<locked>> | 80% | 40,335 psi | 65% | 3140 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 41,408 psi | 66% | 3094 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 50,227 psi | 81% | 3215 fps | 100% |
| IMR 4831 | <<locked>> | 98% | 45,513 psi | 73% | 3245 fps | 95.7% |
| IMR 4895 | <<locked>> | 82% | 40,219 psi | 64% | 3123 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 42,960 psi | 69% | 3133 fps | 97.5% |
| Lovex D073.5 | <<locked>> | 80% | 48,602 psi | 78% | 3241 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 39,639 psi | 64% | 3087 fps | 98.3% |
| Lovex S060 | <<locked>> | 80% | 41,321 psi | 66% | 3051 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 36,245 psi | 58% | 2976 fps | 95.6% |
| Lovex S065 | <<locked>> | 96% | 49,327 psi | 79% | 3258 fps | 95% |
| Norma 201 | <<locked>> | 80% | 40,030 psi | 64% | 3064 fps | 96.9% |
| Norma 202 | <<locked>> | 80% | 40,176 psi | 64% | 3081 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 41,133 psi | 66% | 3133 fps | 95.7% |
| Norma URP | <<locked>> | 96% | 44,338 psi | 71% | 3241 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 40,988 psi | 66% | 3143 fps | 95.4% |
| Ramshot TAC | <<locked>> | 84% | 49,211 psi | 79% | 3251 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,192 psi | 68% | 3143 fps | 96% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,644 psi | 75% | 3189 fps | 97.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 42% | 1972 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,327 psi | 77% | 3248 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,518 psi | 84% | 3320 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 43,990 psi | 71% | 3268 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 33,634 psi | 54% | 3012 fps | 95.7% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 47,747 psi | 77% | 3333 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 48,254 psi | 77% | 3346 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 43,758 psi | 70% | 3133 fps | 99.3% |
| Rottweil R 902 | <<locked>> | 80% | 38,159 psi | 61% | 3005 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 86% | 38,508 psi | 62% | 3064 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 96% | 49,327 psi | 79% | 3258 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,639 psi | 64% | 3087 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 36,245 psi | 58% | 2976 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,966 psi | 82% | 3261 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 39,958 psi | 64% | 3123 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,792 psi | 81% | 3274 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 47,369 psi | 76% | 3222 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,465 psi | 63% | 3064 fps | 95.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,582 psi | 67% | 3038 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,316 psi | 55% | 2867 fps | 98.5% |
| Somchem S321 | <<locked>> | 80% | 46,485 psi | 75% | 3225 fps | 98.6% |
| Somchem S335 | <<locked>> | 80% | 41,147 psi | 66% | 3038 fps | 99.5% |
| Somchem S341 | <<locked>> | 80% | 40,814 psi | 65% | 3084 fps | 95.5% |
| Somchem S355 | <<locked>> | 86% | 39,465 psi | 63% | 3074 fps | 95.8% |
| Somchem S365 | <<locked>> | 92% | 34,766 psi | 56% | 3038 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 47,021 psi | 75% | 3136 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,742 psi | 67% | 3041 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,173 psi | 60% | 3009 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 38,130 psi | 61% | 3009 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 82% | 32,982 psi | 53% | 2877 fps | 95% |
| Vihtavuori N160 | <<locked>> | 96% | 46,673 psi | 75% | 3248 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 42,888 psi | 69% | 3127 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 80% | 36,738 psi | 59% | 2982 fps | 98% |
| Vihtavuori N550 | <<locked>> | 96% | 46,079 psi | 74% | 3251 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 38,783 psi | 62% | 3028 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 42,322 psi | 68% | 3173 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,798 psi | 62% | 3064 fps | 95.6% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 107 powders for .300 H&H Mag. loaded with the .308 | 115gr | Sierra VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,550 fps; across all powders the maximum-charge window runs from 2,149 fps to 3,550 fps. Accurate 4350 gives the best case fill at 100 %, and 107 of the 107 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.308" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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. As outliers, Accurate 2700, Alliant Reloder-23, Alliant Reloder-26 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.