Looking at the .308 FT/R 30 inch... 1 in 12 twist

According to Lutz bullet stabilization data the heavy 175, 185 and up will not stabilize with 1 in 12 twist.

I plan to shoot 1000 yards.

Savage website does not provide any information (that i could find) on what this rifle is tuned for...

is it tuned for 155's at 1000 yards?

or mid range ?

Thanks

Mike