Load Specifications
Bullet Manufacturer:Brenneke
Bullet Weight:132 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:1:11.5
Load data in caliber .300 H&H Mag. with .308 | 132gr | Brenneke TIG nature bullet and 95 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% | 55,695 psi | 89% | 3123 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,983 psi | 87% | 3143 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,708 psi | 86% | 3136 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,405 psi | 90% | 3212 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,795 psi | 86% | 3182 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,940 psi | 86% | 3251 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 55,071 psi | 88% | 3219 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 56,217 psi | 90% | 3215 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,969 psi | 87% | 3169 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 54,375 psi | 87% | 3153 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,695 psi | 89% | 3291 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,940 psi | 88% | 3343 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,811 psi | 89% | 3238 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,172 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,040 psi | 85% | 3202 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,967 psi | 83% | 3255 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,330 psi | 86% | 3304 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,738 psi | 59% | 2930 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,998 psi | 88% | 3228 fps | 98.8% |
| Bofors RP3 | <<locked>> | 92% | 52,721 psi | 85% | 3192 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,869 psi | 90% | 3159 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,229 psi | 85% | 3196 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,332 psi | 89% | 3304 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 82% | 54,505 psi | 87% | 3173 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,811 psi | 89% | 3199 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,969 psi | 87% | 3205 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 98% | 53,563 psi | 86% | 3248 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 88% | 55,622 psi | 89% | 3235 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,196 psi | 77% | 3123 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,897 psi | 88% | 3261 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,983 psi | 56% | 2005 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,287 psi | 85% | 3176 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 55,114 psi | 88% | 3222 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,593 psi | 89% | 3202 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,782 psi | 89% | 3173 fps | 96.4% |
| IMR 4198 | <<locked>> | 82% | 55,463 psi | 89% | 3094 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,347 psi | 89% | 3192 fps | 96.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,966 psi | 82% | 3182 fps | 98.2% |
| IMR 4895 | <<locked>> | 90% | 54,404 psi | 87% | 3238 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 53,969 psi | 87% | 3169 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 53,838 psi | 86% | 3150 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,563 psi | 87% | 3196 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,578 psi | 88% | 3143 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 55,042 psi | 88% | 3192 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 54,549 psi | 87% | 3182 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 3215 fps | 96.6% |
| Norma 201 | <<locked>> | 88% | 53,490 psi | 86% | 3159 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 54,027 psi | 87% | 3166 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,695 psi | 89% | 3248 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 53,127 psi | 85% | 3241 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 90% | 52,924 psi | 85% | 3215 fps | 99.2% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,214 psi | 84% | 3228 fps | 96.7% |
| Ramshot TAC | <<locked>> | 86% | 54,491 psi | 87% | 3176 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,969 psi | 87% | 3202 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,013 psi | 88% | 3166 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 57% | 2054 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,388 psi | 86% | 3153 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,447 psi | 87% | 3182 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,229 psi | 85% | 3271 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,069 psi | 85% | 3310 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,853 psi | 86% | 3274 fps | 98.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,925 psi | 86% | 3301 fps | 98% |
| Rottweil R 901 | <<locked>> | 86% | 54,273 psi | 87% | 3150 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,012 psi | 87% | 3159 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 56,231 psi | 90% | 3241 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,549 psi | 87% | 3182 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,563 psi | 87% | 3196 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,042 psi | 88% | 3192 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 3215 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,694 psi | 88% | 3251 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,188 psi | 90% | 3159 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,707 psi | 85% | 3150 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,476 psi | 86% | 3182 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,172 psi | 88% | 3107 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,579 psi | 89% | 3100 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,998 psi | 88% | 3130 fps | 96.2% |
| Somchem S321 | <<locked>> | 84% | 55,434 psi | 89% | 3205 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,592 psi | 88% | 3104 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,115 psi | 90% | 3205 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 53,142 psi | 85% | 3182 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,456 psi | 76% | 3179 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 55,071 psi | 88% | 3074 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,390 psi | 89% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,563 psi | 86% | 3130 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,824 psi | 88% | 3146 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,723 psi | 88% | 3166 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 3245 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 54,549 psi | 87% | 3169 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 53,055 psi | 85% | 3136 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,824 psi | 88% | 3241 fps | 98.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,871 psi | 64% | 3018 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,127 psi | 85% | 3166 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 54,375 psi | 87% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,809 psi | 86% | 3251 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,417 psi | 86% | 3192 fps | 99.6% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,919 psi | 74% | 2966 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,357 psi | 81% | 3084 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,058 psi | 61% | 2851 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,600 psi | 73% | 3028 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 36,042 psi | 58% | 2831 fps | 99.2% |
| Accurate 4350 | <<locked>> | 92% | 40,335 psi | 65% | 2986 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 42,424 psi | 68% | 2976 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 38,435 psi | 62% | 2861 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,570 psi | 71% | 2995 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 44,309 psi | 71% | 2992 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,098 psi | 84% | 3228 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,493 psi | 62% | 2979 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,288 psi | 57% | 2815 fps | 96.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,677 psi | 83% | 3077 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,145 psi | 61% | 2890 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,364 psi | 65% | 3002 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 34,998 psi | 56% | 2890 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,592 psi | 55% | 2867 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,684 psi | 67% | 2969 fps | 96.1% |
| Bofors RP3 | <<locked>> | 80% | 34,766 psi | 56% | 2812 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,311 psi | 74% | 2989 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,221 psi | 69% | 3005 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,790 psi | 77% | 3166 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 51,010 psi | 82% | 3117 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,170 psi | 84% | 3140 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,089 psi | 66% | 2946 fps | 95% |
| Hodgdon H414 | <<locked>> | 96% | 49,908 psi | 80% | 3179 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 42,830 psi | 69% | 2989 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,606 psi | 55% | 2818 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,740 psi | 62% | 2943 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,918 psi | 42% | 1795 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,162 psi | 66% | 2936 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 42,061 psi | 67% | 2992 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,739 psi | 61% | 2841 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,388 psi | 84% | 3110 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 52,127 psi | 84% | 3045 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,025 psi | 83% | 3130 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 38,914 psi | 62% | 2933 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,102 psi | 63% | 2927 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,570 psi | 71% | 2995 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 50,227 psi | 81% | 3091 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,205 psi | 66% | 2949 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,612 psi | 68% | 2913 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 37,420 psi | 60% | 2844 fps | 97.4% |
| Lovex S065 | <<locked>> | 92% | 45,063 psi | 72% | 3002 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 48,646 psi | 78% | 3091 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,292 psi | 66% | 2923 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 41,611 psi | 67% | 2936 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 37,521 psi | 60% | 2877 fps | 96% |
| Norma URP | <<locked>> | 92% | 40,611 psi | 65% | 2986 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,115 psi | 60% | 2884 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 48,675 psi | 78% | 3159 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,498 psi | 71% | 2986 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,990 psi | 71% | 3012 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,211 psi | 77% | 3045 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,208 psi | 42% | 1837 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,053 psi | 80% | 3094 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,747 psi | 77% | 3058 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,842 psi | 64% | 2999 fps | 96% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,460 psi | 52% | 2828 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,219 psi | 64% | 3002 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,700 psi | 70% | 3087 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 45,020 psi | 72% | 2982 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,189 psi | 63% | 2864 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 82% | 34,853 psi | 56% | 2808 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,063 psi | 72% | 3002 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,205 psi | 66% | 2949 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 37,420 psi | 60% | 2844 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 96% | 48,646 psi | 78% | 3091 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,303 psi | 58% | 2867 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,837 psi | 85% | 3107 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,554 psi | 68% | 2949 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,944 psi | 66% | 2933 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,960 psi | 69% | 2890 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,534 psi | 57% | 2733 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,416 psi | 82% | 3068 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 48,196 psi | 77% | 3077 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 42,380 psi | 68% | 2887 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,438 psi | 68% | 2953 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 33,562 psi | 54% | 2759 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 31,546 psi | 51% | 2792 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,646 psi | 78% | 2976 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,279 psi | 69% | 2894 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,682 psi | 62% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,378 psi | 63% | 2864 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,894 psi | 51% | 2694 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 90% | 39,871 psi | 64% | 2933 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 44,570 psi | 71% | 2986 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,029 psi | 61% | 2848 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 41,887 psi | 67% | 2989 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 98% | 37,173 psi | 60% | 2953 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,085 psi | 56% | 2785 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 44,034 psi | 71% | 3031 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 50,140 psi | 80% | 3182 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,451 psi | 65% | 2936 fps | 97.5% |
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 | 132gr | Brenneke TIG nature. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,343 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,343 fps. Accurate 3100 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 53–90 %, leaving at least 10 % headroom. The 132.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 3100, Alliant Reloder-19, 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.