Load Specifications
Load data in caliber .244 Rem. with .243 | 80gr | Osprey 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 ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Power Pro 2000-MR.
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% | 55,709 psi | 89% | 3199 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,302 psi | 87% | 3222 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,070 psi | 87% | 3215 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,634 psi | 84% | 3232 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 54,070 psi | 87% | 3261 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,433 psi | 87% | 3337 fps | 98.7% |
| ADI AR 2206H | <<locked>> | 88% | 55,361 psi | 89% | 3304 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 94% | 56,188 psi | 90% | 3294 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,085 psi | 87% | 3248 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,491 psi | 87% | 3232 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,854 psi | 90% | 3373 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,216 psi | 89% | 3425 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,072 psi | 90% | 3320 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,419 psi | 89% | 3212 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,330 psi | 86% | 3284 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,489 psi | 84% | 3340 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,679 psi | 86% | 3386 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,115 psi | 60% | 3009 fps | 96.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,158 psi | 88% | 3307 fps | 98.9% |
| Bofors RP3 | <<locked>> | 92% | 53,214 psi | 85% | 3278 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,912 psi | 90% | 3235 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,476 psi | 86% | 3274 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,608 psi | 89% | 3386 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 82% | 54,926 psi | 88% | 3255 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,086 psi | 90% | 3278 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,259 psi | 87% | 3284 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 98% | 53,795 psi | 86% | 3327 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 88% | 55,898 psi | 90% | 3317 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,544 psi | 78% | 3202 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,201 psi | 89% | 3343 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,983 psi | 56% | 2060 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,534 psi | 86% | 3258 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 55,506 psi | 89% | 3304 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,941 psi | 90% | 3284 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,115 psi | 90% | 3255 fps | 96.5% |
| IMR 4198 | <<locked>> | 82% | 55,434 psi | 89% | 3173 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,637 psi | 89% | 3271 fps | 96.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,488 psi | 83% | 3264 fps | 98.3% |
| IMR 4895 | <<locked>> | 90% | 54,694 psi | 88% | 3320 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 86% | 54,085 psi | 87% | 3248 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 53,998 psi | 87% | 3225 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,795 psi | 88% | 3274 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,056 psi | 88% | 3228 fps | 99.5% |
| Lovex S062 | <<locked>> | 92% | 55,143 psi | 88% | 3271 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 54,810 psi | 88% | 3261 fps | 97.6% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 3294 fps | 96.7% |
| Norma 201 | <<locked>> | 88% | 53,766 psi | 86% | 3238 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 54,375 psi | 87% | 3248 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,985 psi | 90% | 3330 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 53,621 psi | 86% | 3323 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 90% | 53,200 psi | 85% | 3294 fps | 99.2% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,692 psi | 84% | 3314 fps | 96.9% |
| Ramshot TAC | <<locked>> | 86% | 54,665 psi | 88% | 3258 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,099 psi | 87% | 3278 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,245 psi | 89% | 3248 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,331 psi | 57% | 2110 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,476 psi | 86% | 3228 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,824 psi | 88% | 3261 fps | 96.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,621 psi | 86% | 3356 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,287 psi | 85% | 3392 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,360 psi | 87% | 3356 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,505 psi | 87% | 3386 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 86% | 54,563 psi | 87% | 3228 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,201 psi | 87% | 3238 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 94% | 52,663 psi | 84% | 3258 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,810 psi | 88% | 3261 fps | 97.6% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,795 psi | 88% | 3274 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,143 psi | 88% | 3271 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,767 psi | 89% | 3294 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,955 psi | 88% | 3333 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,895 psi | 85% | 3228 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,809 psi | 86% | 3264 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,680 psi | 89% | 3189 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,927 psi | 90% | 3179 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,550 psi | 89% | 3212 fps | 96.4% |
| Somchem S321 | <<locked>> | 84% | 55,767 psi | 89% | 3287 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,824 psi | 88% | 3179 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,304 psi | 90% | 3287 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 53,432 psi | 86% | 3264 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,761 psi | 77% | 3258 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 84% | 55,071 psi | 88% | 3150 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,883 psi | 90% | 3176 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,650 psi | 86% | 3205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,911 psi | 88% | 3222 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,245 psi | 89% | 3248 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,405 psi | 90% | 3323 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 54,897 psi | 88% | 3251 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 53,330 psi | 86% | 3215 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,390 psi | 89% | 3327 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,248 psi | 65% | 3097 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,505 psi | 86% | 3241 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 54,679 psi | 88% | 3304 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,157 psi | 87% | 3333 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,722 psi | 86% | 3274 fps | 99.6% |
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 2015 | <<locked>> | 80% | 46,093 psi | 74% | 3041 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,488 psi | 81% | 3159 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,334 psi | 61% | 2927 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,759 psi | 73% | 3107 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 36,260 psi | 58% | 2907 fps | 99.2% |
| Accurate 4350 | <<locked>> | 92% | 40,582 psi | 65% | 3061 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,554 psi | 68% | 3048 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 38,537 psi | 62% | 2933 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,686 psi | 72% | 3071 fps | 98.9% |
| Alliant AR-Comp | <<locked>> | 80% | 44,585 psi | 71% | 3071 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,243 psi | 84% | 3307 fps | 99.5% |
| Alliant Power Pro 2000-MR | 39.2 gr | 80% | 38,667 psi | 62% | 3058 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,520 psi | 57% | 2890 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,895 psi | 83% | 3156 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,290 psi | 61% | 2963 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,567 psi | 65% | 3077 fps | 95.7% |
| Alliant Reloder-17 | 40.5 gr | 84% | 35,172 psi | 56% | 2963 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,809 psi | 56% | 2943 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,916 psi | 67% | 3045 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 34,940 psi | 56% | 2884 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,383 psi | 74% | 3064 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,439 psi | 70% | 3081 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,022 psi | 77% | 3241 fps | 98.2% |
| Hodgdon H322 | <<locked>> | 80% | 51,024 psi | 82% | 3192 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,272 psi | 84% | 3215 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,423 psi | 66% | 3025 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 96% | 50,357 psi | 81% | 3261 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 42,946 psi | 69% | 3064 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,679 psi | 56% | 2887 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,827 psi | 62% | 3015 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,904 psi | 42% | 1844 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,394 psi | 66% | 3012 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 42,134 psi | 68% | 3068 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,855 psi | 61% | 2910 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,707 psi | 85% | 3192 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 52,257 psi | 84% | 3123 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,286 psi | 84% | 3212 fps | 95.5% |
| IMR 4831 | <<locked>> | 92% | 39,059 psi | 63% | 3005 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 39,233 psi | 63% | 2999 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 80% | 44,686 psi | 72% | 3071 fps | 98.9% |
| Lovex D073.5 | <<locked>> | 80% | 50,647 psi | 81% | 3169 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,365 psi | 66% | 3025 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,830 psi | 69% | 2989 fps | 97.6% |
| Lovex S062 | <<locked>> | 80% | 37,637 psi | 60% | 2917 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 45,324 psi | 73% | 3081 fps | 95.4% |
| Lovex S070 | <<locked>> | 96% | 49,052 psi | 79% | 3173 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,510 psi | 67% | 2999 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 41,901 psi | 67% | 3015 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 37,637 psi | 60% | 2949 fps | 96% |
| Norma URP | <<locked>> | 92% | 40,698 psi | 65% | 3061 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 37,304 psi | 60% | 2959 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 96% | 45,992 psi | 74% | 3176 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 44,817 psi | 72% | 3064 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,092 psi | 71% | 3084 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,515 psi | 78% | 3127 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 42% | 1886 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,169 psi | 80% | 3169 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 48,008 psi | 77% | 3133 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,103 psi | 64% | 3077 fps | 96.1% |
| ReloadSwiss RS 60 | 38.6 gr | 80% | 32,750 psi | 53% | 2907 fps | 97.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,509 psi | 65% | 3081 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,859 psi | 70% | 3163 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 45,005 psi | 72% | 3054 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,465 psi | 63% | 2943 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,764 psi | 53% | 2818 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,324 psi | 73% | 3081 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,365 psi | 66% | 3025 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 37,637 psi | 60% | 2917 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 96% | 49,052 psi | 79% | 3173 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,376 psi | 58% | 2940 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,888 psi | 69% | 3028 fps | 95.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,205 psi | 66% | 3012 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,062 psi | 69% | 2966 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,621 psi | 57% | 2802 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,590 psi | 83% | 3143 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 48,457 psi | 78% | 3159 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 42,612 psi | 68% | 2963 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,641 psi | 68% | 3028 fps | 97.4% |
| Somchem S355 | <<locked>> | 80% | 33,794 psi | 54% | 2835 fps | 95.2% |
| Somchem S365 | <<locked>> | 88% | 31,633 psi | 51% | 2864 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,747 psi | 78% | 3048 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,381 psi | 70% | 2966 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,798 psi | 62% | 2936 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,639 psi | 64% | 2940 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 32,126 psi | 52% | 2762 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 90% | 40,089 psi | 64% | 3009 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,759 psi | 72% | 3064 fps | 99% |
| Vihtavuori N540 | <<locked>> | 80% | 38,218 psi | 61% | 2920 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 42,134 psi | 68% | 3068 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 98% | 37,536 psi | 60% | 3031 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,128 psi | 56% | 2854 fps | 95.9% |
| Winchester 748 | <<locked>> | 80% | 44,280 psi | 71% | 3110 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 50,357 psi | 81% | 3261 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,611 psi | 65% | 3012 fps | 97.6% |
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 | 80gr | Osprey Virtus. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,425 fps; across all powders the maximum-charge window runs from 2,060 fps to 3,425 fps. Accurate 4350 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 80.0 gr projectile in 0.243" calls for a 1:9.5 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for .244 Rem. with the .243 | 80gr | Osprey 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.