Load Specifications
Load data in caliber .244 Rem. with .243 | 89gr | Merlin Virtus bullet and 94 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% | 55,071 psi | 88% | 3031 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,200 psi | 85% | 3045 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,811 psi | 89% | 3123 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,113 psi | 85% | 3038 fps | 96% |
| Accurate 4064 | <<locked>> | 90% | 53,461 psi | 86% | 3094 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,954 psi | 87% | 3179 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 86% | 54,288 psi | 87% | 3133 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 55,593 psi | 89% | 3136 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,330 psi | 86% | 3081 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,172 psi | 87% | 3064 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,331 psi | 87% | 3258 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,405 psi | 89% | 3156 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,086 psi | 90% | 3179 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,274 psi | 89% | 3245 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 94% | 52,750 psi | 85% | 3219 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,305 psi | 63% | 2940 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,150 psi | 71% | 3110 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,215 psi | 87% | 3143 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 55,970 psi | 90% | 3169 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,304 psi | 90% | 3136 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,868 psi | 88% | 3064 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,376 psi | 90% | 3166 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,650 psi | 88% | 3215 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 90% | 53,606 psi | 86% | 3127 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 96% | 53,316 psi | 85% | 3173 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 54,882 psi | 88% | 3146 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,416 psi | 82% | 3107 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,737 psi | 88% | 3182 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,317 psi | 87% | 3212 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,317 psi | 57% | 1952 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,405 psi | 90% | 3150 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,810 psi | 88% | 3130 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,882 psi | 88% | 3114 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,013 psi | 88% | 3091 fps | 97.2% |
| IMR 4350 | <<locked>> | 98% | 53,069 psi | 85% | 3100 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,868 psi | 88% | 3117 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,621 psi | 88% | 3173 fps | 99.4% |
| IMR 4895 | <<locked>> | 88% | 53,925 psi | 86% | 3156 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 84% | 53,330 psi | 86% | 3081 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,128 psi | 87% | 3107 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,085 psi | 87% | 3061 fps | 99.8% |
| Lovex S062 | <<locked>> | 90% | 54,621 psi | 88% | 3110 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,838 psi | 86% | 3100 fps | 98.2% |
| Lovex S070 | <<locked>> | 98% | 54,998 psi | 88% | 3143 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 56,188 psi | 90% | 3127 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,679 psi | 86% | 3081 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,259 psi | 89% | 3166 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 53,084 psi | 85% | 3166 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 90% | 56,043 psi | 90% | 3189 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,521 psi | 89% | 3219 fps | 98.3% |
| Ramshot TAC | <<locked>> | 84% | 53,853 psi | 86% | 3097 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,330 psi | 86% | 3117 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,215 psi | 87% | 3081 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 57% | 1998 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,072 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,824 psi | 86% | 3104 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,040 psi | 85% | 3189 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,333 psi | 90% | 3284 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,911 psi | 86% | 3202 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,345 psi | 86% | 3225 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 84% | 53,505 psi | 86% | 3054 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,490 psi | 86% | 3074 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,825 psi | 90% | 3159 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,304 psi | 90% | 3136 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,838 psi | 86% | 3100 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,128 psi | 87% | 3107 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,621 psi | 88% | 3110 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,998 psi | 88% | 3143 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,215 psi | 87% | 3166 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,709 psi | 89% | 3130 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,011 psi | 85% | 3100 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,476 psi | 87% | 3015 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,114 psi | 88% | 3015 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,505 psi | 87% | 3058 fps | 97.2% |
| Somchem S321 | <<locked>> | 82% | 54,476 psi | 87% | 3114 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 53,998 psi | 87% | 3012 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,274 psi | 89% | 3120 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 56,347 psi | 90% | 3159 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,937 psi | 82% | 3166 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,085 psi | 87% | 2979 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,781 psi | 88% | 3002 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,388 psi | 86% | 3041 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,346 psi | 87% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,172 psi | 87% | 3081 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,767 psi | 89% | 3169 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 84% | 53,708 psi | 86% | 3081 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,057 psi | 90% | 3104 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,549 psi | 87% | 3166 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,178 psi | 69% | 3025 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,231 psi | 90% | 3143 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,911 psi | 86% | 3133 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,737 psi | 86% | 3182 fps | 97.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,027 psi | 56% | 2920 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,289 psi | 90% | 3163 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% | 48,544 psi | 78% | 2930 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,582 psi | 65% | 2828 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,472 psi | 78% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,792 psi | 80% | 2979 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 38,377 psi | 62% | 2818 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 37,579 psi | 60% | 2854 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 44,672 psi | 72% | 2953 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 80% | 38,087 psi | 61% | 2789 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,804 psi | 75% | 2966 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 80% | 47,413 psi | 76% | 2959 fps | 100% |
| Alliant Power Pro 2000-MR | 38.2 gr | 80% | 40,959 psi | 66% | 2982 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,449 psi | 60% | 2805 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,321 psi | 65% | 2877 fps | 97.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 37,739 psi | 61% | 2877 fps | 95.9% |
| Alliant Reloder-17 | 37.6 gr | 80% | 32,503 psi | 52% | 2759 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,474 psi | 52% | 2753 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,189 psi | 61% | 2963 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,034 psi | 71% | 2953 fps | 97.7% |
| Bofors RP3 | <<locked>> | 80% | 37,072 psi | 59% | 2805 fps | 97.9% |
| Bofors RP7 | <<locked>> | 92% | 49,414 psi | 79% | 3015 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,675 psi | 78% | 2959 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,963 psi | 74% | 2989 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,068 psi | 82% | 3153 fps | 99.3% |
| Hodgdon H380 | <<locked>> | 80% | 38,029 psi | 61% | 2812 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 92% | 46,644 psi | 75% | 3048 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 45,078 psi | 72% | 2966 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,430 psi | 52% | 2700 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,220 psi | 66% | 2930 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 94% | 50,415 psi | 81% | 3143 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,281 psi | 42% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,366 psi | 70% | 2913 fps | 98.8% |
| IMR 3031 | <<locked>> | 80% | 44,817 psi | 72% | 2966 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,987 psi | 64% | 2828 fps | 97.3% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,382 psi | 73% | 2910 fps | 95% |
| IMR 4350 | <<locked>> | 96% | 50,111 psi | 80% | 3048 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 48,283 psi | 77% | 2995 fps | 95.7% |
| IMR 4831 | <<locked>> | 88% | 36,230 psi | 58% | 2805 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,321 psi | 66% | 2910 fps | 98.1% |
| IMR 8208 XBR | <<locked>> | 80% | 46,804 psi | 75% | 2966 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 43,816 psi | 70% | 2930 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 44,599 psi | 72% | 2887 fps | 98.7% |
| Lovex S062 | <<locked>> | 80% | 39,537 psi | 63% | 2825 fps | 98.7% |
| Lovex S065 | <<locked>> | 88% | 41,843 psi | 67% | 2871 fps | 95.5% |
| Lovex S070 | <<locked>> | 92% | 45,208 psi | 72% | 2959 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 43,497 psi | 70% | 2900 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,990 psi | 71% | 2913 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,697 psi | 64% | 2864 fps | 97.7% |
| Norma URP | <<locked>> | 88% | 37,971 psi | 61% | 2864 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,624 psi | 64% | 2881 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 42,337 psi | 68% | 2966 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 46,818 psi | 75% | 2969 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,543 psi | 75% | 2992 fps | 99% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,604 psi | 81% | 3018 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,469 psi | 42% | 1788 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,576 psi | 84% | 3058 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,048 psi | 71% | 2917 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,743 psi | 69% | 2992 fps | 97.8% |
| ReloadSwiss RS 60 | 37.6 gr | 80% | 34,650 psi | 56% | 2838 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 37,565 psi | 60% | 2877 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 40,306 psi | 65% | 2949 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 47,340 psi | 76% | 2949 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,365 psi | 66% | 2844 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 34,766 psi | 56% | 2740 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 92% | 49,414 psi | 79% | 3015 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,843 psi | 67% | 2871 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,816 psi | 70% | 2930 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 39,537 psi | 63% | 2825 fps | 98.7% |
| Shooters World SW4350 | <<locked>> | 92% | 45,208 psi | 72% | 2959 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,100 psi | 58% | 2799 fps | 96.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,991 psi | 72% | 2936 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,366 psi | 70% | 2920 fps | 98.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,194 psi | 72% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,550 psi | 60% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 47,616 psi | 76% | 2936 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 50,705 psi | 81% | 3051 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,556 psi | 71% | 2854 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,817 psi | 72% | 2936 fps | 98.7% |
| Somchem S355 | <<locked>> | 80% | 35,607 psi | 57% | 2749 fps | 97% |
| Somchem S365 | <<locked>> | 84% | 29,486 psi | 47% | 2674 fps | 96% |
| Vihtavuori N130 | <<locked>> | 80% | 51,053 psi | 82% | 2933 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,585 psi | 73% | 2858 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,147 psi | 66% | 2838 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,655 psi | 67% | 2841 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,910 psi | 54% | 2684 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 86% | 37,057 psi | 59% | 2802 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 46,978 psi | 75% | 2963 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 80% | 40,263 psi | 65% | 2828 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 88% | 39,175 psi | 63% | 2867 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 94% | 35,172 psi | 56% | 2841 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,358 psi | 52% | 2654 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 46,862 psi | 75% | 3012 fps | 99.9% |
| Winchester 760 | <<locked>> | 92% | 46,644 psi | 75% | 3048 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,822 psi | 53% | 2848 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,946 psi | 69% | 2923 fps | 98.8% |
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 94 powders for .244 Rem. loaded with the .243 | 89gr | Merlin Virtus. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,952 fps to 3,284 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 94 of the 94 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 89.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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 .244 Rem. with the .243 | 89gr | Merlin Virtus 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.