Load Specifications
Bullet:.306 | 120gr | Sax KJG-SR
Bullet Manufacturer:Sax
Bullet Weight:120 gr
Bullet Diameter:0.306"
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:1:12.5
Load data in caliber .300 H&H Mag. with .306 | 120gr | Sax KJG-SR 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.
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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 2015 | <<locked>> | 86% | 53,708 psi | 86% | 3225 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,651 psi | 89% | 3294 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,245 psi | 89% | 3287 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,954 psi | 87% | 3301 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,100 psi | 88% | 3330 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,184 psi | 82% | 3320 fps | 97.2% |
| Accurate LT-30 | <<locked>> | 82% | 55,912 psi | 90% | 3215 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,304 psi | 90% | 3241 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,231 psi | 90% | 3363 fps | 99% |
| ADI AR 2208 | <<locked>> | 94% | 53,853 psi | 86% | 3297 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,390 psi | 89% | 3317 fps | 99.6% |
| Alliant AR-Comp | <<locked>> | 88% | 55,434 psi | 89% | 3307 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 53,316 psi | 85% | 3376 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,956 psi | 90% | 3481 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 53,505 psi | 86% | 3320 fps | 99.3% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,272 psi | 85% | 3235 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,085 psi | 87% | 3340 fps | 98.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,719 psi | 80% | 3320 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,447 psi | 87% | 3442 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,390 psi | 89% | 3199 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,347 psi | 90% | 3369 fps | 98.3% |
| Bofors RP3 | <<locked>> | 94% | 53,983 psi | 87% | 3337 fps | 99.4% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,896 psi | 86% | 3248 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,723 psi | 88% | 3343 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,504 psi | 84% | 3376 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 84% | 55,796 psi | 89% | 3323 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 53,534 psi | 86% | 3287 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,245 psi | 89% | 3343 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 88% | 53,330 psi | 86% | 3317 fps | 99% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,759 psi | 73% | 3186 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,072 psi | 90% | 3409 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,795 psi | 56% | 2093 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,694 psi | 88% | 3320 fps | 99.2% |
| IMR 3031 | <<locked>> | 90% | 56,159 psi | 90% | 3373 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,301 psi | 85% | 3281 fps | 98.3% |
| IMR 4198 | <<locked>> | 82% | 53,214 psi | 85% | 3196 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,486 psi | 78% | 3248 fps | 96.8% |
| IMR 4895 | <<locked>> | 92% | 55,434 psi | 89% | 3379 fps | 99% |
| IMR 8208 XBR | <<locked>> | 88% | 55,390 psi | 89% | 3317 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 84% | 55,680 psi | 89% | 3301 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 55,883 psi | 90% | 3340 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,159 psi | 90% | 3291 fps | 99.1% |
| Lovex S062 | <<locked>> | 94% | 56,246 psi | 90% | 3337 fps | 99.7% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,622 psi | 89% | 3314 fps | 96.7% |
| Norma 201 | <<locked>> | 90% | 54,940 psi | 88% | 3304 fps | 99.6% |
| Norma 202 | <<locked>> | 90% | 55,492 psi | 89% | 3317 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,243 psi | 85% | 3327 fps | 98.7% |
| Norma URPᴾ | <<locked>> | 100% | 50,546 psi | 81% | 3310 fps | 97% |
| Ramshot Big Game | <<locked>> | 92% | 53,838 psi | 86% | 3350 fps | 98.7% |
| Ramshot TAC | <<locked>> | 88% | 56,086 psi | 90% | 3320 fps | 97% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,390 psi | 89% | 3346 fps | 98.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,171 psi | 85% | 3251 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,201 psi | 56% | 2142 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,897 psi | 88% | 3304 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,970 psi | 90% | 3320 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,201 psi | 87% | 3412 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,259 psi | 87% | 3455 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,923 psi | 82% | 3337 fps | 96.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,459 psi | 83% | 3356 fps | 96.3% |
| Rottweil R 901 | <<locked>> | 88% | 55,767 psi | 89% | 3301 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,419 psi | 89% | 3304 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 96% | 53,548 psi | 86% | 3317 fps | 99.2% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,622 psi | 89% | 3314 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,883 psi | 90% | 3340 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,246 psi | 90% | 3337 fps | 99.7% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,636 psi | 88% | 3261 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,651 psi | 89% | 3389 fps | 99% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,027 psi | 87% | 3258 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,331 psi | 87% | 3291 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,723 psi | 88% | 3323 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 53,243 psi | 85% | 3199 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,316 psi | 85% | 3192 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 53,171 psi | 85% | 3291 fps | 99.6% |
| Somchem S335 | <<locked>> | 90% | 55,927 psi | 90% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 53,795 psi | 86% | 3287 fps | 98.7% |
| Somchem S355 | <<locked>> | 96% | 54,201 psi | 87% | 3323 fps | 99.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,121 psi | 72% | 3245 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 86% | 56,376 psi | 90% | 3225 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 53,301 psi | 85% | 3189 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,723 psi | 88% | 3278 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,941 psi | 90% | 3291 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,985 psi | 90% | 3307 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,258 psi | 85% | 3314 fps | 97.5% |
| Vihtavuori N530 | <<locked>> | 88% | 56,086 psi | 90% | 3317 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 54,389 psi | 87% | 3281 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,301 psi | 84% | 3310 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,389 psi | 87% | 3297 fps | 99.4% |
| Winchester 748 | <<locked>> | 88% | 55,564 psi | 89% | 3366 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,578 psi | 88% | 3333 fps | 99.2% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,411 psi | 71% | 3061 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,573 psi | 78% | 3173 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 36,956 psi | 59% | 2940 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 43,801 psi | 70% | 3110 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 34,925 psi | 56% | 2913 fps | 98.2% |
| Accurate 4350 | <<locked>> | 96% | 44,251 psi | 71% | 3179 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 52,504 psi | 84% | 3159 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,881 psi | 85% | 3186 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,770 psi | 65% | 3045 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 86% | 41,901 psi | 67% | 3051 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,757 psi | 69% | 3068 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 42,337 psi | 68% | 3087 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,690 psi | 80% | 3304 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,380 psi | 68% | 3186 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,274 psi | 58% | 2946 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,922 psi | 80% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 41,756 psi | 67% | 3084 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 96% | 43,845 psi | 70% | 3189 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 38,667 psi | 62% | 3087 fps | 95.5% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,025 psi | 83% | 3143 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,714 psi | 68% | 3100 fps | 95.2% |
| Bofors RP3 | <<locked>> | 82% | 35,839 psi | 57% | 2946 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,817 psi | 72% | 3074 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,466 psi | 66% | 3081 fps | 98% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,455 psi | 73% | 3235 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 80% | 48,965 psi | 79% | 3209 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,067 psi | 80% | 3228 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 45,136 psi | 72% | 3143 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 41,060 psi | 66% | 3061 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 37,826 psi | 61% | 3002 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,086 psi | 59% | 3009 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,846 psi | 41% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,624 psi | 64% | 3009 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 40,219 psi | 64% | 3077 fps | 99.9% |
| IMR 4064 | <<locked>> | 84% | 41,278 psi | 66% | 3031 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,111 psi | 80% | 3143 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 42,293 psi | 68% | 3117 fps | 95% |
| IMR 4895 | <<locked>> | 82% | 40,118 psi | 64% | 3061 fps | 95.7% |
| IMR 8208 XBR | <<locked>> | 80% | 42,757 psi | 69% | 3068 fps | 97.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,399 psi | 78% | 3173 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 39,552 psi | 63% | 3025 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 41,249 psi | 66% | 2989 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 36,187 psi | 58% | 2917 fps | 95.9% |
| Lovex S065 | <<locked>> | 96% | 49,110 psi | 79% | 3192 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 39,987 psi | 64% | 3002 fps | 97.1% |
| Norma 202 | <<locked>> | 80% | 40,118 psi | 64% | 3018 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 38,566 psi | 62% | 3012 fps | 95.2% |
| Norma URP | <<locked>> | 96% | 44,121 psi | 71% | 3176 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 40,756 psi | 65% | 3081 fps | 95.7% |
| Ramshot TAC | <<locked>> | 84% | 49,037 psi | 79% | 3189 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,235 psi | 68% | 3081 fps | 96.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,485 psi | 75% | 3123 fps | 97.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 42% | 1923 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,182 psi | 77% | 3179 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,359 psi | 84% | 3255 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 40,814 psi | 65% | 3133 fps | 95.1% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 33,504 psi | 54% | 2953 fps | 96% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 44,179 psi | 71% | 3199 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 48,037 psi | 77% | 3284 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 43,845 psi | 70% | 3074 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 38,058 psi | 61% | 2946 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 84% | 36,056 psi | 58% | 2946 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 96% | 49,110 psi | 79% | 3192 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,552 psi | 63% | 3025 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 36,187 psi | 58% | 2917 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,039 psi | 82% | 3199 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 39,740 psi | 64% | 3064 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,589 psi | 81% | 3202 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 47,166 psi | 76% | 3156 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,392 psi | 63% | 3005 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,394 psi | 66% | 2972 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,171 psi | 55% | 2805 fps | 98.6% |
| Somchem S321 | <<locked>> | 80% | 46,325 psi | 74% | 3159 fps | 98.7% |
| Somchem S335 | <<locked>> | 80% | 41,089 psi | 66% | 2976 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 40,698 psi | 65% | 3025 fps | 95.8% |
| Somchem S355 | <<locked>> | 84% | 36,985 psi | 59% | 2953 fps | 95.2% |
| Somchem S365 | <<locked>> | 92% | 34,606 psi | 55% | 2982 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 46,862 psi | 75% | 3068 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,582 psi | 67% | 2976 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,043 psi | 59% | 2943 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 37,942 psi | 61% | 2943 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 32,895 psi | 53% | 2822 fps | 95.3% |
| Vihtavuori N160 | <<locked>> | 94% | 43,526 psi | 70% | 3120 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,917 psi | 69% | 3064 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 80% | 36,666 psi | 59% | 2923 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 96% | 45,759 psi | 73% | 3182 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 38,682 psi | 62% | 2972 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 42,105 psi | 68% | 3107 fps | 98.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,798 psi | 62% | 3005 fps | 95.9% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 89 powders for .300 H&H Mag. loaded with the .306 | 120gr | Sax KJG-SR. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,481 fps. Accurate 4350 gives the best case fill at 100 %, and 89 of the 89 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 120.0 gr projectile in 0.306" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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.