Load Specifications
Load data in caliber .300 Weath. Mag. with .308 | 154gr | Peregrine VLR-5 bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.
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 2495 | <<locked>> | 84% | 56,898 psi | 89% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,288 psi | 87% | 3028 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,779 psi | 83% | 3058 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 57,392 psi | 90% | 3064 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,926 psi | 86% | 3117 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 56,782 psi | 89% | 3100 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,592 psi | 86% | 3051 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,478 psi | 89% | 3169 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,896 psi | 84% | 3176 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,463 psi | 88% | 3163 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,201 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,419 psi | 87% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,101 psi | 88% | 3186 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,609 psi | 90% | 3212 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,637 psi | 87% | 3150 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3146 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 3081 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,308 psi | 68% | 2986 fps | 98.2% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,548 psi | 84% | 3225 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,058 psi | 89% | 3120 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,414 psi | 76% | 3058 fps | 96% |
| Bofors RP3 | <<locked>> | 86% | 56,014 psi | 88% | 3087 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3146 fps | 97.3% |
| Bofors RP7 | <<locked>> | 90% | 55,651 psi | 87% | 3074 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 56,637 psi | 89% | 3107 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 57,595 psi | 90% | 3179 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 57,276 psi | 90% | 3136 fps | 98.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,797 psi | 89% | 3140 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 82% | 57,406 psi | 90% | 3110 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,217 psi | 88% | 3100 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,244 psi | 85% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,215 psi | 85% | 3153 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 57% | 1946 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,027 psi | 86% | 3058 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 57,493 psi | 90% | 3087 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,724 psi | 89% | 3068 fps | 98.9% |
| IMR 4350 | <<locked>> | 94% | 56,594 psi | 89% | 3104 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,276 psi | 90% | 3100 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 55,651 psi | 87% | 3114 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,898 psi | 89% | 3127 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,898 psi | 88% | 3087 fps | 95.9% |
| Lovex D073.6 | <<locked>> | 82% | 57,130 psi | 90% | 3068 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,579 psi | 87% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,667 psi | 90% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,203 psi | 90% | 3094 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,013 psi | 86% | 3081 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,584 psi | 68% | 2887 fps | 97.4% |
| Norma 201 | <<locked>> | 82% | 55,361 psi | 87% | 3041 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,072 psi | 88% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,708 psi | 86% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,925 psi | 85% | 3097 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 56,449 psi | 88% | 3238 fps | 99% |
| Norma URP | <<locked>> | 94% | 57,508 psi | 90% | 3163 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,782 psi | 87% | 3110 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 56,565 psi | 89% | 3163 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,195 psi | 72% | 2992 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 57% | 1991 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,652 psi | 89% | 3091 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,623 psi | 89% | 3173 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,072 psi | 89% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,071 psi | 86% | 3143 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,638 psi | 90% | 3238 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 56,014 psi | 88% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,072 psi | 88% | 3084 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,491 psi | 85% | 3074 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 54,781 psi | 86% | 3133 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 55,651 psi | 87% | 3074 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,203 psi | 90% | 3094 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,130 psi | 90% | 3068 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,667 psi | 90% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,013 psi | 86% | 3081 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,215 psi | 85% | 3091 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,361 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,260 psi | 88% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,319 psi | 90% | 2972 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,159 psi | 90% | 3048 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,302 psi | 85% | 3127 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 55,956 psi | 88% | 2966 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,999 psi | 88% | 3081 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 57,000 psi | 89% | 3166 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,492 psi | 87% | 3110 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 56,826 psi | 89% | 2953 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,304 psi | 88% | 2999 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,840 psi | 89% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,580 psi | 90% | 3058 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,999 psi | 88% | 3100 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,126 psi | 80% | 3018 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 54,984 psi | 86% | 3009 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,245 psi | 87% | 3107 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 3166 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3228 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,956 psi | 88% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,983 psi | 85% | 3117 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,976 psi | 70% | 3130 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,419 psi | 87% | 3074 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,912 psi | 88% | 3107 fps | 97.6% |
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 2495 | <<locked>> | 80% | 49,980 psi | 78% | 2904 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,327 psi | 76% | 2904 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 37,115 psi | 58% | 2746 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 47,398 psi | 74% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,940 psi | 56% | 2740 fps | 96.8% |
| ADI AR 2206H | <<locked>> | 80% | 53,301 psi | 84% | 3045 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,237 psi | 71% | 2881 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 46,108 psi | 72% | 2972 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,966 psi | 78% | 3104 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 46,166 psi | 72% | 2969 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,513 psi | 71% | 2904 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,733 psi | 76% | 2979 fps | 99.8% |
| Alliant Reloder-16 | 63.4 gr | 80% | 35,360 psi | 55% | 2756 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,205 psi | 63% | 2894 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 45,600 psi | 71% | 2963 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,963 psi | 72% | 3012 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 29,167 psi | 46% | 2595 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 94% | 35,462 psi | 56% | 2785 fps | 95.3% |
| Alliant Reloder-26 | 75.2 gr | 86% | 33,982 psi | 53% | 2792 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,200 psi | 83% | 3058 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 45,107 psi | 71% | 2992 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 45,672 psi | 72% | 2913 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 45,963 psi | 72% | 3012 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 43,004 psi | 67% | 2831 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,195 psi | 72% | 2923 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 40,814 psi | 64% | 2858 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 82% | 44,005 psi | 69% | 2887 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,084 psi | 83% | 3074 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 53,882 psi | 84% | 3054 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,822 psi | 51% | 2644 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,633 psi | 79% | 3031 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 43,221 psi | 68% | 2940 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 42% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,605 psi | 81% | 3002 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,572 psi | 75% | 2920 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,835 psi | 78% | 2946 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 41,147 psi | 64% | 2808 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,814 psi | 66% | 2808 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 34,577 psi | 54% | 2690 fps | 96.5% |
| IMR 4895 | <<locked>> | 80% | 50,009 psi | 78% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,475 psi | 82% | 3028 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 80% | 53,519 psi | 84% | 3015 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,214 psi | 82% | 2966 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,558 psi | 75% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,218 psi | 61% | 2753 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 39,929 psi | 63% | 2782 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 38,087 psi | 60% | 2769 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 51,938 psi | 81% | 2986 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,591 psi | 82% | 2982 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,109 psi | 75% | 2966 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 46,847 psi | 73% | 2966 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 42,279 psi | 66% | 2966 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 35,998 psi | 56% | 2740 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 80% | 48,443 psi | 76% | 2986 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 37,463 psi | 59% | 2785 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 98% | 42,670 psi | 67% | 2920 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 43% | 1785 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,340 psi | 73% | 2907 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,779 psi | 83% | 3107 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,772 psi | 67% | 2963 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,824 psi | 56% | 2756 fps | 96.4% |
| ReloadSwiss RS 70 | 69.3 gr | 80% | 34,954 psi | 55% | 2759 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 49,255 psi | 77% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,946 psi | 67% | 2854 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 51,082 psi | 80% | 3015 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 44,701 psi | 70% | 2943 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 43,004 psi | 67% | 2831 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,218 psi | 61% | 2753 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,519 psi | 84% | 3015 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,558 psi | 75% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,929 psi | 63% | 2782 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,309 psi | 69% | 2913 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,779 psi | 81% | 3009 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,721 psi | 83% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,454 psi | 70% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,901 psi | 64% | 2746 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,295 psi | 69% | 2936 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 52,576 psi | 82% | 2917 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,395 psi | 68% | 2858 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 32,343 psi | 51% | 2687 fps | 98.7% |
| Somchem S385 | <<locked>> | 90% | 42,308 psi | 66% | 2861 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 53,316 psi | 84% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,530 psi | 78% | 2897 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,995 psi | 78% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,452 psi | 65% | 2782 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 37,420 psi | 59% | 2746 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 96% | 44,715 psi | 70% | 2897 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,254 psi | 76% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,869 psi | 58% | 2740 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 30,052 psi | 47% | 2615 fps | 95% |
| Vihtavuori N560 | <<locked>> | 98% | 52,866 psi | 83% | 3159 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,666 psi | 57% | 2710 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 41,002 psi | 64% | 2861 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,514 psi | 43% | 2618 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,808 psi | 81% | 3015 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,020 psi | 71% | 2910 fps | 95% |
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 96 powders for .300 Weath. Mag. loaded with the .308 | 154gr | Peregrine VLR-5. Norma MRP delivers the highest muzzle velocity at 3,238 fps; across all powders the maximum-charge window runs from 1,946 fps to 3,238 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 154.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, 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. ReloadSwiss RS 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for .300 Weath. Mag. with the .308 | 154gr | Peregrine VLR-5 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.