Load Specifications
Load data in caliber 7.62 UKM with .307 | 150gr | Rhino Penetrator bullet and 95 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-26 and Hodgdon Superformance.
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>> | 82% | 54,810 psi | 86% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,956 psi | 88% | 3061 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,114 psi | 85% | 3100 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 55,216 psi | 87% | 3054 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,159 psi | 88% | 3163 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 57,450 psi | 90% | 3136 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,158 psi | 86% | 3087 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,116 psi | 90% | 3202 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,955 psi | 86% | 3189 fps | 96.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,520 psi | 85% | 3212 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,159 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,362 psi | 88% | 3136 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,724 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,331 psi | 85% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,507 psi | 89% | 3189 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3186 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,647 psi | 79% | 3120 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,295 psi | 69% | 3028 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,723 psi | 86% | 3264 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,682 psi | 90% | 3153 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 3097 fps | 96.3% |
| Bofors RP3 | <<locked>> | 86% | 57,159 psi | 90% | 3130 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,838 psi | 84% | 3186 fps | 97.5% |
| Bofors RP7 | <<locked>> | 90% | 56,376 psi | 88% | 3107 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 86% | 57,392 psi | 90% | 3143 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,679 psi | 86% | 3153 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 88% | 54,317 psi | 85% | 3110 fps | 97.6% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,725 psi | 90% | 3176 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,145 psi | 90% | 3140 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,926 psi | 86% | 3127 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,882 psi | 86% | 3186 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 57% | 1972 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,564 psi | 87% | 3091 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,752 psi | 86% | 3071 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,305 psi | 90% | 3104 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 57,421 psi | 90% | 3140 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,621 psi | 86% | 3081 fps | 98.6% |
| IMR 4831 | <<locked>> | 94% | 56,521 psi | 89% | 3153 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,099 psi | 85% | 3107 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,521 psi | 89% | 3123 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 56,130 psi | 88% | 3054 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,882 psi | 86% | 3064 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,737 psi | 86% | 3081 fps | 99.4% |
| Lovex S070 | <<locked>> | 92% | 56,072 psi | 88% | 3120 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,889 psi | 70% | 2936 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 56,217 psi | 88% | 3077 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,014 psi | 89% | 3074 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,651 psi | 87% | 3120 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,592 psi | 86% | 3133 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3278 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 54,853 psi | 86% | 3146 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 56,420 psi | 88% | 3143 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 57,276 psi | 90% | 3199 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,007 psi | 74% | 3031 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,028 psi | 58% | 2018 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,348 psi | 90% | 3127 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,319 psi | 90% | 3209 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,740 psi | 90% | 3241 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,159 psi | 88% | 3186 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,636 psi | 86% | 3212 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,366 psi | 68% | 3041 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 56,826 psi | 89% | 3077 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,261 psi | 90% | 3127 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,143 psi | 86% | 3110 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 98% | 55,738 psi | 87% | 3173 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 90% | 56,376 psi | 88% | 3107 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,737 psi | 86% | 3081 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 54,882 psi | 86% | 3064 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,072 psi | 88% | 3120 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,143 psi | 86% | 3130 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,985 psi | 88% | 3104 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,855 psi | 89% | 3005 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,505 psi | 85% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,331 psi | 85% | 3025 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,259 psi | 87% | 3169 fps | 97.7% |
| Somchem S335 | <<locked>> | 82% | 56,666 psi | 89% | 2999 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,029 psi | 89% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,145 psi | 90% | 3100 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 54,056 psi | 85% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,376 psi | 88% | 3146 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 57,392 psi | 90% | 2986 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,305 psi | 90% | 3035 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,508 psi | 90% | 3051 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,940 psi | 86% | 3041 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,942 psi | 89% | 3140 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 3058 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 55,912 psi | 88% | 3045 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,028 psi | 88% | 3143 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,797 psi | 89% | 3205 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3264 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,869 psi | 89% | 3104 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,679 psi | 86% | 3153 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,064 psi | 72% | 3176 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,333 psi | 88% | 3114 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,884 psi | 89% | 3143 fps | 97.8% |
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% | 51,314 psi | 80% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,008 psi | 77% | 2940 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 38,392 psi | 60% | 2795 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,617 psi | 76% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,985 psi | 58% | 2789 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 80% | 53,954 psi | 85% | 3077 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,847 psi | 72% | 2917 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 46,934 psi | 74% | 3012 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 51,256 psi | 80% | 3120 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,807 psi | 80% | 3146 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,427 psi | 73% | 2949 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,472 psi | 78% | 3018 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,042 psi | 56% | 2795 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,944 psi | 64% | 2936 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,485 psi | 73% | 3002 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 46,963 psi | 74% | 3054 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 28,210 psi | 44% | 2585 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,419 psi | 57% | 2835 fps | 95.8% |
| Alliant Reloder-26 | 75.3 gr | 86% | 35,041 psi | 55% | 2844 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,027 psi | 85% | 3094 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 46,093 psi | 72% | 3038 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 46,673 psi | 73% | 2956 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 46,963 psi | 74% | 3054 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,060 psi | 64% | 2812 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 47,007 psi | 74% | 2963 fps | 99% |
| Hodgdon H414 | <<locked>> | 82% | 41,756 psi | 65% | 2904 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 82% | 44,788 psi | 70% | 2927 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,795 psi | 84% | 3110 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,576 psi | 53% | 2687 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,329 psi | 80% | 3068 fps | 100% |
| Hodgdon Superformance | 74 gr | 82% | 40,915 psi | 64% | 2910 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,035 psi | 42% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,156 psi | 82% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,225 psi | 76% | 2956 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,589 psi | 79% | 2986 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 41,843 psi | 66% | 2844 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,438 psi | 67% | 2844 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 35,592 psi | 56% | 2736 fps | 96.8% |
| IMR 4895 | <<locked>> | 80% | 50,734 psi | 80% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,098 psi | 83% | 3064 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 52,736 psi | 83% | 3002 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,370 psi | 76% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,045 psi | 63% | 2792 fps | 96.8% |
| Lovex S070 | <<locked>> | 82% | 40,785 psi | 64% | 2825 fps | 95.8% |
| Lovex S071 | <<locked>> | 94% | 36,970 psi | 58% | 2762 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,765 psi | 83% | 3022 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,534 psi | 84% | 3022 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,863 psi | 77% | 3005 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 47,732 psi | 75% | 3005 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 40,205 psi | 63% | 2940 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 36,796 psi | 58% | 2782 fps | 97% |
| Ramshot Big Game | <<locked>> | 80% | 49,356 psi | 77% | 3025 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 38,218 psi | 60% | 2828 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 43,714 psi | 69% | 2963 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 43% | 1808 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,050 psi | 74% | 2943 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,461 psi | 84% | 3146 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,482 psi | 68% | 2999 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,738 psi | 58% | 2802 fps | 96.8% |
| ReloadSwiss RS 70 | 69.4 gr | 80% | 35,853 psi | 56% | 2805 fps | 95.9% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,263 psi | 63% | 2959 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 50,314 psi | 79% | 2972 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,903 psi | 69% | 2897 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 51,692 psi | 81% | 3048 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 45,455 psi | 71% | 2982 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 41,060 psi | 64% | 2812 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,045 psi | 63% | 2792 fps | 96.8% |
| Shooters World Precision | <<locked>> | 80% | 48,370 psi | 76% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,785 psi | 64% | 2825 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,020 psi | 71% | 2953 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,417 psi | 82% | 3045 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,563 psi | 84% | 2956 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,266 psi | 71% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,247 psi | 62% | 2733 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,092 psi | 71% | 2979 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,316 psi | 84% | 2949 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,237 psi | 69% | 2897 fps | 99.7% |
| Somchem S361 | <<locked>> | 94% | 53,505 psi | 84% | 3038 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 33,301 psi | 52% | 2736 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 43,395 psi | 68% | 2907 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 54,085 psi | 85% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,502 psi | 79% | 2936 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,676 psi | 79% | 2946 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,264 psi | 66% | 2825 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,189 psi | 60% | 2785 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 94% | 42,569 psi | 67% | 2874 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,008 psi | 77% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,681 psi | 59% | 2782 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 31,038 psi | 49% | 2667 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 98% | 53,621 psi | 84% | 3196 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,521 psi | 59% | 2756 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 39,102 psi | 61% | 2841 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,529 psi | 45% | 2680 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,678 psi | 83% | 3054 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,992 psi | 72% | 2953 fps | 95.3% |
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 7.62 UKM loaded with the .307 | 150gr | Rhino Penetrator. Norma MRP delivers the highest muzzle velocity at 3,278 fps; across all powders the maximum-charge window runs from 1,972 fps to 3,278 fps. Accurate 3100 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 (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.307" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, Alliant Reloder-22 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-26, Hodgdon Superformance rank at the top here: for 7.62 UKM with the .307 | 150gr | Rhino Penetrator 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.