Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 135gr | CutEdge ER Raptor bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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.
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>> | 84% | 53,476 psi | 86% | 3074 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,550 psi | 89% | 3153 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,419 psi | 89% | 3143 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,188 psi | 90% | 3205 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 55,448 psi | 89% | 3192 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 3274 fps | 99.1% |
| ADI AR 2206H | <<locked>> | 86% | 52,866 psi | 85% | 3169 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 92% | 54,128 psi | 87% | 3173 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,405 psi | 89% | 3182 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,159 psi | 90% | 3163 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 52,663 psi | 84% | 3291 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,070 psi | 87% | 3199 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,534 psi | 87% | 3215 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,621 psi | 86% | 3278 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 55,042 psi | 88% | 3323 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,000 psi | 61% | 2959 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,714 psi | 68% | 3127 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,765 psi | 85% | 3179 fps | 98.8% |
| Bofors RP3 | <<locked>> | 92% | 54,549 psi | 87% | 3212 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 54,665 psi | 88% | 3166 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,650 psi | 86% | 3110 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,984 psi | 88% | 3209 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,171 psi | 85% | 3251 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 84% | 55,332 psi | 89% | 3169 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,680 psi | 89% | 3225 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 94% | 53,316 psi | 85% | 3232 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 53,432 psi | 86% | 3186 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,908 psi | 80% | 3143 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,953 psi | 85% | 3219 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 56% | 1998 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,766 psi | 86% | 3173 fps | 99.7% |
| IMR 3031 | <<locked>> | 90% | 55,259 psi | 89% | 3205 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,999 psi | 90% | 3196 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 94% | 55,608 psi | 89% | 3163 fps | 96.8% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,143 psi | 88% | 3192 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,519 psi | 86% | 3153 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,630 psi | 75% | 3091 fps | 97.8% |
| IMR 4895 | <<locked>> | 90% | 55,941 psi | 90% | 3251 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 55,405 psi | 89% | 3182 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,361 psi | 89% | 3159 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,188 psi | 90% | 3205 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,927 psi | 90% | 3153 fps | 99.7% |
| Lovex S062 | <<locked>> | 90% | 53,113 psi | 85% | 3150 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 55,883 psi | 90% | 3199 fps | 98.1% |
| Lovex S070 | <<locked>> | 98% | 53,461 psi | 86% | 3173 fps | 96.7% |
| Norma 201 | <<locked>> | 88% | 54,984 psi | 88% | 3173 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,564 psi | 89% | 3179 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,722 psi | 86% | 3202 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 54,926 psi | 88% | 3261 fps | 99% |
| Ramshot Big Game | <<locked>> | 90% | 54,418 psi | 87% | 3228 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 54,070 psi | 87% | 3255 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 56,072 psi | 90% | 3196 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,637 psi | 89% | 3219 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,347 psi | 90% | 3179 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,563 psi | 57% | 2044 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,868 psi | 88% | 3163 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,072 psi | 90% | 3199 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,955 psi | 88% | 3291 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,810 psi | 88% | 3327 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,970 psi | 90% | 3297 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 3327 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 55,535 psi | 89% | 3153 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,506 psi | 89% | 3169 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,157 psi | 87% | 3196 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 54,665 psi | 88% | 3166 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,883 psi | 90% | 3199 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,188 psi | 90% | 3205 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,113 psi | 85% | 3150 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 53,461 psi | 86% | 3173 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 52,750 psi | 85% | 3205 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,157 psi | 87% | 3166 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,911 psi | 88% | 3199 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,113 psi | 85% | 3061 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,447 psi | 86% | 3054 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,026 psi | 85% | 3087 fps | 96.3% |
| Somchem S321 | <<locked>> | 82% | 52,997 psi | 85% | 3153 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,970 psi | 90% | 3110 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,824 psi | 86% | 3159 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 54,621 psi | 88% | 3199 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,211 psi | 79% | 3199 fps | 100% |
| Unknown powder | <<locked>> | 98% | 56,246 psi | 90% | 3271 fps | 98.7% |
| Vihtavuori N130 | <<locked>> | 84% | 55,042 psi | 88% | 3064 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,130 psi | 90% | 3094 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,216 psi | 89% | 3140 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,317 psi | 89% | 3143 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 55,956 psi | 90% | 3176 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,258 psi | 85% | 3182 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 84% | 55,085 psi | 88% | 3189 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,172 psi | 88% | 3169 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 53,258 psi | 85% | 3228 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,539 psi | 67% | 3048 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,607 psi | 88% | 3179 fps | 99.9% |
| Winchester 748 | <<locked>> | 82% | 52,736 psi | 85% | 3179 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,316 psi | 85% | 3232 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,405 psi | 90% | 3228 fps | 99.9% |
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% | 47,166 psi | 76% | 2972 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,880 psi | 83% | 3094 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,320 psi | 63% | 2867 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,324 psi | 73% | 3022 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 37,217 psi | 60% | 2851 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 38,957 psi | 62% | 2943 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 43,569 psi | 70% | 2989 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 36,970 psi | 59% | 2815 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,672 psi | 73% | 3005 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 45,716 psi | 73% | 3002 fps | 100% |
| Alliant Power Pro 2000-MR | 61.4 gr | 80% | 39,523 psi | 63% | 2999 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,347 psi | 58% | 2835 fps | 97.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,233 psi | 63% | 2907 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 38,957 psi | 62% | 2959 fps | 95.6% |
| Alliant Reloder-17 | 62 gr | 82% | 33,692 psi | 54% | 2844 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 33,446 psi | 54% | 2831 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,769 psi | 64% | 3054 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,960 psi | 69% | 2989 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 35,882 psi | 58% | 2831 fps | 97% |
| Bofors RP7 | <<locked>> | 94% | 51,285 psi | 82% | 3107 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,427 psi | 76% | 2999 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,396 psi | 71% | 3018 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,356 psi | 79% | 3182 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 48,530 psi | 78% | 3058 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 39,508 psi | 63% | 2900 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 92% | 49,719 psi | 80% | 3166 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 43,947 psi | 70% | 3002 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 33,431 psi | 54% | 2779 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,507 psi | 60% | 2900 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,962 psi | 42% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,044 psi | 63% | 2877 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 39,697 psi | 64% | 2927 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,129 psi | 58% | 2792 fps | 95.5% |
| IMR 4166 Enduron | <<locked>> | 90% | 49,139 psi | 79% | 3045 fps | 95.4% |
| IMR 4350 | <<locked>> | 98% | 51,822 psi | 83% | 3136 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 50,067 psi | 80% | 3087 fps | 95.5% |
| IMR 4831 | <<locked>> | 94% | 38,363 psi | 62% | 2910 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,205 psi | 64% | 2943 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 45,672 psi | 73% | 3005 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 51,735 psi | 83% | 3100 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,409 psi | 68% | 2963 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 43,627 psi | 70% | 2927 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 38,522 psi | 62% | 2858 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 43,497 psi | 70% | 2959 fps | 95.4% |
| Lovex S070 | <<locked>> | 94% | 46,862 psi | 75% | 3051 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,395 psi | 68% | 2936 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 42,801 psi | 69% | 2949 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 38,624 psi | 62% | 2894 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 39,233 psi | 63% | 2946 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 38,174 psi | 61% | 2904 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 44,048 psi | 71% | 3054 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 45,701 psi | 73% | 3002 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,107 psi | 72% | 3022 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,516 psi | 79% | 3061 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 42% | 1831 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,256 psi | 82% | 3104 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,876 psi | 74% | 3012 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,336 psi | 66% | 3022 fps | 96.9% |
| ReloadSwiss RS 60 | 60.5 gr | 80% | 33,518 psi | 54% | 2854 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,914 psi | 62% | 2963 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,105 psi | 68% | 3045 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 46,180 psi | 74% | 2992 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,306 psi | 65% | 2881 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 33,750 psi | 54% | 2769 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 94% | 51,285 psi | 82% | 3107 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,497 psi | 70% | 2959 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,409 psi | 68% | 2963 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 38,522 psi | 62% | 2858 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 94% | 46,862 psi | 75% | 3051 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,969 psi | 56% | 2825 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,859 psi | 70% | 2969 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,192 psi | 68% | 2953 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,874 psi | 70% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,361 psi | 58% | 2740 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 49,429 psi | 79% | 3025 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 49,574 psi | 79% | 3094 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 43,468 psi | 70% | 2897 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,743 psi | 70% | 2972 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 34,577 psi | 55% | 2779 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 30,560 psi | 49% | 2756 fps | 95.8% |
| Unknown powder | <<locked>> | 88% | 40,176 psi | 64% | 2956 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 48,689 psi | 78% | 2963 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,408 psi | 66% | 2844 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,697 psi | 64% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,103 psi | 64% | 2871 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 29,414 psi | 47% | 2615 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 88% | 40,306 psi | 65% | 2930 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 80% | 48,153 psi | 77% | 3068 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 39,682 psi | 64% | 2884 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 88% | 40,582 psi | 65% | 2972 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 36,172 psi | 58% | 2917 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 33,736 psi | 54% | 2743 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 49,211 psi | 79% | 3117 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 49,719 psi | 80% | 3166 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,243 psi | 84% | 3159 fps | 99.7% |
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 95 powders for .300 Win. Mag. loaded with the .308 | 135gr | CutEdge ER Raptor. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,327 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,327 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 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 135.0 gr projectile in 0.308" calls for a 1:10.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .300 Win. Mag. with the .308 | 135gr | CutEdge ER Raptor they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.