Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 135gr | Atomic 29 FNHP bullet and 90 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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>> | 82% | 53,882 psi | 86% | 3097 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,260 psi | 90% | 3166 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,505 psi | 87% | 3186 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,724 psi | 89% | 3166 fps | 96.6% |
| Accurate 4064 | <<locked>> | 88% | 52,881 psi | 85% | 3163 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,417 psi | 86% | 3248 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 84% | 53,287 psi | 85% | 3199 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 90% | 54,534 psi | 87% | 3202 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,709 psi | 89% | 3205 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,200 psi | 85% | 3130 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,272 psi | 85% | 3320 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,679 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,158 psi | 88% | 3245 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,810 psi | 88% | 3320 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,159 psi | 90% | 3356 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,945 psi | 67% | 3071 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,645 psi | 76% | 3255 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,374 psi | 86% | 3209 fps | 99.2% |
| Bofors RP3 | <<locked>> | 90% | 55,317 psi | 89% | 3238 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 55,288 psi | 89% | 3205 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,809 psi | 86% | 3133 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,521 psi | 89% | 3232 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 56,376 psi | 90% | 3255 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 94% | 52,852 psi | 85% | 3241 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 53,882 psi | 86% | 3209 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,752 psi | 88% | 3238 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,621 psi | 86% | 3245 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,345 psi | 86% | 3278 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 57% | 2037 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,347 psi | 89% | 3219 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 53,940 psi | 86% | 3199 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,925 psi | 86% | 3182 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,693 psi | 86% | 3153 fps | 97% |
| IMR 4350 | <<locked>> | 98% | 56,188 psi | 90% | 3235 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,969 psi | 87% | 3182 fps | 97% |
| IMR 4831 | <<locked>> | 98% | 54,230 psi | 87% | 3245 fps | 99.3% |
| IMR 4895 | <<locked>> | 86% | 53,127 psi | 85% | 3222 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 84% | 55,709 psi | 89% | 3205 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,098 psi | 85% | 3169 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,231 psi | 90% | 3182 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 53,867 psi | 86% | 3179 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,330 psi | 86% | 3176 fps | 98.2% |
| Lovex S070 | <<locked>> | 96% | 54,346 psi | 87% | 3209 fps | 97.4% |
| Norma 201 | <<locked>> | 86% | 55,317 psi | 89% | 3199 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,159 psi | 90% | 3202 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,375 psi | 87% | 3232 fps | 99.8% |
| Norma URP | <<locked>> | 98% | 56,405 psi | 90% | 3301 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 88% | 55,405 psi | 89% | 3258 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 55,361 psi | 89% | 3294 fps | 98.2% |
| Ramshot TAC | <<locked>> | 84% | 56,130 psi | 90% | 3219 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,014 psi | 90% | 3241 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,998 psi | 58% | 2083 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,011 psi | 85% | 3169 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,840 psi | 90% | 3320 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,840 psi | 90% | 3360 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,534 psi | 86% | 3271 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,939 psi | 85% | 3301 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 56,057 psi | 90% | 3182 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 56,014 psi | 90% | 3199 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,405 psi | 89% | 3232 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 55,288 psi | 89% | 3205 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,330 psi | 86% | 3176 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,098 psi | 85% | 3169 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,867 psi | 86% | 3179 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,346 psi | 87% | 3209 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,795 psi | 86% | 3238 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 54,650 psi | 88% | 3196 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,332 psi | 89% | 3222 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,388 psi | 86% | 3084 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,012 psi | 87% | 3081 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,388 psi | 86% | 3120 fps | 96.9% |
| Somchem S335 | <<locked>> | 86% | 56,202 psi | 90% | 3130 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,389 psi | 87% | 3186 fps | 99.7% |
| Somchem S355 | <<locked>> | 92% | 55,564 psi | 89% | 3232 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,621 psi | 88% | 3301 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 56,304 psi | 90% | 3094 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 53,795 psi | 86% | 3071 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,883 psi | 90% | 3159 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,171 psi | 85% | 3123 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,664 psi | 86% | 3153 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 55,071 psi | 88% | 3235 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 84% | 56,202 psi | 90% | 3205 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,998 psi | 88% | 3166 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,302 psi | 87% | 3241 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,311 psi | 74% | 3156 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,506 psi | 89% | 3212 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,721 psi | 85% | 3196 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,069 psi | 85% | 3248 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,536 psi | 60% | 3064 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,492 psi | 89% | 3235 fps | 100% |
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 2015 | <<locked>> | 80% | 50,531 psi | 81% | 3045 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,033 psi | 69% | 2946 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,894 psi | 82% | 3127 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,141 psi | 84% | 3107 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 40,741 psi | 65% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 37,362 psi | 60% | 2913 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 46,775 psi | 75% | 3074 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 39,740 psi | 64% | 2900 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,950 psi | 78% | 3087 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 49,705 psi | 80% | 3077 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,047 psi | 69% | 3107 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,465 psi | 63% | 2923 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,395 psi | 68% | 2995 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 37,101 psi | 59% | 2930 fps | 95.5% |
| Alliant Reloder-17 | 65.1 gr | 80% | 34,142 psi | 55% | 2874 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,256 psi | 52% | 2812 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 94% | 38,087 psi | 61% | 3028 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,354 psi | 74% | 3077 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 39,233 psi | 63% | 2927 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 48,733 psi | 78% | 3081 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,604 psi | 81% | 3077 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,298 psi | 77% | 3110 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 40,089 psi | 64% | 2930 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 90% | 46,035 psi | 74% | 3110 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 47,253 psi | 76% | 3087 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 31,937 psi | 51% | 2749 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,598 psi | 70% | 3051 fps | 99.2% |
| Hodgdon Superformance | 79.2 gr | 92% | 49,574 psi | 79% | 3202 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 42% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,353 psi | 73% | 3035 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 47,152 psi | 76% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,742 psi | 67% | 2943 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 47,268 psi | 76% | 3031 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 49,342 psi | 79% | 3114 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 47,500 psi | 76% | 3058 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 35,969 psi | 58% | 2864 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 43,453 psi | 70% | 3031 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 48,950 psi | 78% | 3087 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 46,224 psi | 74% | 3051 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,514 psi | 75% | 3005 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 41,568 psi | 67% | 2943 fps | 99% |
| Lovex S065 | <<locked>> | 86% | 41,321 psi | 66% | 2930 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 44,788 psi | 72% | 3025 fps | 95% |
| Norma 201 | <<locked>> | 80% | 45,716 psi | 73% | 3022 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 46,180 psi | 74% | 3031 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,742 psi | 67% | 2982 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 37,463 psi | 60% | 2913 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 41,771 psi | 67% | 2999 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 45,078 psi | 72% | 3094 fps | 95.9% |
| Ramshot TAC | <<locked>> | 80% | 49,124 psi | 79% | 3091 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,820 psi | 78% | 3117 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 43% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,236 psi | 69% | 2976 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,107 psi | 72% | 3117 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,390 psi | 58% | 2956 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,289 psi | 60% | 2930 fps | 95% |
| ReloadSwiss RS 70 | 72.8 gr | 88% | 39,856 psi | 64% | 3012 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,429 psi | 79% | 3071 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,410 psi | 70% | 2966 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 36,709 psi | 59% | 2858 fps | 97.4% |
| Rottweil R 907 | <<locked>> | 90% | 48,733 psi | 78% | 3081 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,321 psi | 66% | 2930 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,224 psi | 74% | 3051 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,568 psi | 67% | 2943 fps | 99% |
| Shooters World SW4350 | <<locked>> | 90% | 44,788 psi | 72% | 3025 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,985 psi | 61% | 2917 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,297 psi | 76% | 3061 fps | 97.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,324 psi | 73% | 3035 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,891 psi | 75% | 2972 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,117 psi | 63% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,746 psi | 75% | 2995 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 46,659 psi | 75% | 2972 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,152 psi | 76% | 3058 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 37,608 psi | 60% | 2867 fps | 97.4% |
| Somchem S365 | <<locked>> | 82% | 29,167 psi | 47% | 2720 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 52,866 psi | 85% | 3045 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,355 psi | 76% | 2966 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,047 psi | 69% | 2949 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,700 psi | 70% | 2956 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,737 psi | 57% | 2795 fps | 98.2% |
| Vihtavuori N160 | <<locked>> | 86% | 39,276 psi | 63% | 2923 fps | 95.9% |
| Vihtavuori N530 | <<locked>> | 80% | 49,182 psi | 79% | 3084 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 42,293 psi | 68% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 38,595 psi | 62% | 2917 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 35,099 psi | 56% | 2897 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,705 psi | 51% | 2700 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 49,226 psi | 79% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,253 psi | 74% | 3114 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 32,721 psi | 52% | 2907 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,078 psi | 72% | 3041 fps | 99.1% |
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 109 powders for .300 Win. Mag. loaded with the .308 | 135gr | Atomic 29 FNHP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,360 fps; across all powders the maximum-charge window runs from 2,037 fps to 3,360 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.308" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 135gr | Atomic 29 FNHP they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 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.