Load Specifications
Load data in caliber 6 mm Rem. with .243 | 80gr | Barnes TTSX BT bullet and 96 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.
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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 2015 | <<locked>> | 86% | 55,114 psi | 88% | 3179 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,374 psi | 86% | 3196 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,127 psi | 85% | 3189 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,825 psi | 90% | 3268 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,243 psi | 85% | 3238 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 3307 fps | 98.5% |
| ADI AR 2206H | <<locked>> | 88% | 54,549 psi | 87% | 3274 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 55,535 psi | 89% | 3271 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,635 psi | 86% | 3225 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 53,780 psi | 86% | 3212 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,158 psi | 88% | 3346 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,215 psi | 87% | 3392 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,390 psi | 89% | 3294 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,679 psi | 88% | 3189 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,130 psi | 90% | 3320 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,590 psi | 83% | 3310 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,779 psi | 85% | 3356 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,563 psi | 87% | 3284 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 55,767 psi | 89% | 3307 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 56,115 psi | 90% | 3261 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,463 psi | 89% | 3215 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,318 psi | 90% | 3310 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,781 psi | 88% | 3360 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 53,911 psi | 86% | 3228 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,245 psi | 89% | 3251 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,606 psi | 86% | 3261 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 98% | 52,939 psi | 85% | 3297 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,071 psi | 88% | 3287 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,616 psi | 76% | 3173 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,476 psi | 87% | 3320 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,722 psi | 56% | 2044 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 56,318 psi | 90% | 3291 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 54,462 psi | 87% | 3278 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,752 psi | 88% | 3248 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,463 psi | 89% | 3228 fps | 96.2% |
| IMR 4198 | <<locked>> | 82% | 54,955 psi | 88% | 3153 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,737 psi | 88% | 3241 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,560 psi | 81% | 3235 fps | 98.1% |
| IMR 4895 | <<locked>> | 90% | 53,940 psi | 86% | 3297 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 53,635 psi | 86% | 3225 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 53,171 psi | 85% | 3199 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,998 psi | 87% | 3251 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,230 psi | 87% | 3199 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 54,375 psi | 87% | 3245 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 53,867 psi | 86% | 3232 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 3268 fps | 96.4% |
| Norma 201 | <<locked>> | 88% | 52,910 psi | 85% | 3212 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 53,490 psi | 86% | 3222 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,230 psi | 89% | 3304 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 52,663 psi | 84% | 3294 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 92% | 56,173 psi | 90% | 3330 fps | 99.5% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,576 psi | 83% | 3278 fps | 96.5% |
| Ramshot TAC | <<locked>> | 86% | 54,099 psi | 87% | 3232 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,432 psi | 86% | 3255 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,563 psi | 87% | 3222 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,085 psi | 56% | 2090 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,982 psi | 85% | 3209 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,882 psi | 86% | 3235 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,808 psi | 85% | 3330 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,391 psi | 90% | 3432 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,142 psi | 85% | 3323 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 3356 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 53,534 psi | 86% | 3202 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,359 psi | 86% | 3209 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 55,608 psi | 89% | 3294 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 56,115 psi | 90% | 3261 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,867 psi | 86% | 3232 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,998 psi | 87% | 3251 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,375 psi | 87% | 3245 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 3268 fps | 96.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,391 psi | 90% | 3232 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,969 psi | 87% | 3304 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,825 psi | 90% | 3219 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,753 psi | 89% | 3264 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,127 psi | 85% | 3241 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,766 psi | 88% | 3159 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,172 psi | 88% | 3159 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,708 psi | 88% | 3186 fps | 96.1% |
| Somchem S321 | <<locked>> | 84% | 54,621 psi | 88% | 3255 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 54,027 psi | 87% | 3153 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,680 psi | 89% | 3264 fps | 99.5% |
| Somchem S355 | <<locked>> | 96% | 55,898 psi | 90% | 3294 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,818 psi | 75% | 3228 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 54,418 psi | 87% | 3127 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,911 psi | 88% | 3150 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,405 psi | 90% | 3235 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,143 psi | 87% | 3199 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,172 psi | 87% | 3219 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,506 psi | 89% | 3297 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 86% | 54,070 psi | 87% | 3225 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 56,188 psi | 90% | 3248 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 3294 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,547 psi | 84% | 3215 fps | 99.6% |
| Winchester 748 | <<locked>> | 86% | 53,896 psi | 86% | 3278 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,316 psi | 85% | 3304 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,678 psi | 84% | 3241 fps | 99.5% |
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% | 45,411 psi | 73% | 3018 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,951 psi | 80% | 3136 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,666 psi | 60% | 2904 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,904 psi | 72% | 3077 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 35,621 psi | 57% | 2884 fps | 99.1% |
| Accurate 4350 | <<locked>> | 92% | 39,929 psi | 64% | 3035 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 42,003 psi | 67% | 3025 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 38,014 psi | 61% | 2907 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,150 psi | 71% | 3045 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 43,787 psi | 70% | 3048 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,547 psi | 83% | 3281 fps | 99.4% |
| Alliant Power Pro 2000-MR | 39.3 gr | 82% | 40,915 psi | 66% | 3104 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,954 psi | 56% | 2864 fps | 96% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,140 psi | 82% | 3133 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,739 psi | 61% | 2940 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 39,929 psi | 64% | 3051 fps | 95.3% |
| Alliant Reloder-17 | 39.6 gr | 84% | 34,592 psi | 55% | 2936 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,191 psi | 66% | 3015 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 34,418 psi | 55% | 2861 fps | 96% |
| Bofors RP7 | <<locked>> | 96% | 52,910 psi | 85% | 3205 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,818 psi | 73% | 3041 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,627 psi | 68% | 3054 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,137 psi | 76% | 3215 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,372 psi | 81% | 3169 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,430 psi | 82% | 3189 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 43,497 psi | 70% | 3061 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 96% | 49,472 psi | 79% | 3232 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,351 psi | 68% | 3038 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,069 psi | 55% | 2858 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,363 psi | 62% | 2992 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,788 psi | 41% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,538 psi | 65% | 2979 fps | 97.4% |
| IMR 3031 | <<locked>> | 80% | 41,756 psi | 67% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,275 psi | 60% | 2887 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,648 psi | 83% | 3159 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,779 psi | 83% | 3104 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 51,735 psi | 83% | 3186 fps | 95.3% |
| IMR 4831 | <<locked>> | 94% | 41,133 psi | 66% | 3045 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 38,638 psi | 62% | 2976 fps | 96.3% |
| IMR 8208 XBR | <<locked>> | 80% | 44,150 psi | 71% | 3045 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 49,777 psi | 80% | 3140 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 40,785 psi | 65% | 3002 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 42,264 psi | 68% | 2966 fps | 97.4% |
| Lovex S062 | <<locked>> | 80% | 37,072 psi | 59% | 2890 fps | 97.2% |
| Lovex S065 | <<locked>> | 92% | 44,672 psi | 72% | 3054 fps | 95.1% |
| Lovex S070 | <<locked>> | 98% | 51,387 psi | 82% | 3205 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,915 psi | 66% | 2972 fps | 98.2% |
| Norma 202 | <<locked>> | 80% | 41,292 psi | 66% | 2992 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 37,115 psi | 60% | 2927 fps | 95.8% |
| Norma URP | <<locked>> | 92% | 40,030 psi | 64% | 3035 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 36,608 psi | 59% | 2930 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 98% | 48,269 psi | 77% | 3212 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 44,150 psi | 71% | 3035 fps | 95.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,337 psi | 69% | 3058 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,790 psi | 77% | 3097 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,194 psi | 42% | 1880 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,617 psi | 80% | 3150 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,355 psi | 76% | 3107 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,204 psi | 63% | 3045 fps | 95.7% |
| ReloadSwiss RS 60 | 37.7 gr | 80% | 32,082 psi | 51% | 2874 fps | 96.7% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,801 psi | 69% | 3123 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,178 psi | 69% | 3133 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 44,672 psi | 72% | 3038 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 38,899 psi | 62% | 2917 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 82% | 34,592 psi | 55% | 2858 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 96% | 52,910 psi | 85% | 3205 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,672 psi | 72% | 3054 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,785 psi | 65% | 3002 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 37,072 psi | 59% | 2890 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 98% | 51,387 psi | 82% | 3205 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,417 psi | 84% | 3166 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,911 psi | 58% | 2917 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,141 psi | 84% | 3159 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,163 psi | 68% | 2999 fps | 95.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,422 psi | 65% | 2979 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,409 psi | 68% | 2940 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,041 psi | 56% | 2779 fps | 99.4% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,097 psi | 82% | 3120 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 47,659 psi | 76% | 3130 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 42,032 psi | 67% | 2940 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,930 psi | 67% | 3002 fps | 97.2% |
| Somchem S355 | <<locked>> | 82% | 35,607 psi | 57% | 2874 fps | 95.8% |
| Somchem S365 | <<locked>> | 88% | 31,053 psi | 50% | 2835 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 48,066 psi | 77% | 3025 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,699 psi | 68% | 2940 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,072 psi | 61% | 2910 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,073 psi | 63% | 2917 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 31,618 psi | 51% | 2740 fps | 95.9% |
| Vihtavuori N160 | <<locked>> | 92% | 42,221 psi | 68% | 3045 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 44,208 psi | 71% | 3041 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 37,463 psi | 60% | 2890 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 92% | 41,553 psi | 67% | 3041 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,664 psi | 56% | 2828 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 43,381 psi | 70% | 3081 fps | 99.3% |
| Winchester 760 | <<locked>> | 96% | 49,472 psi | 79% | 3232 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,842 psi | 64% | 2986 fps | 97.3% |
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 96 powders for 6 mm Rem. loaded with the .243 | 80gr | Barnes TTSX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,432 fps; across all powders the maximum-charge window runs from 2,044 fps to 3,432 fps. Accurate 4350 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 (430 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V 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 6 mm Rem. with the .243 | 80gr | Barnes TTSX BT 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.