Have a long action. Thinking about 7mm-08 and 7x57 and also twist. Any opinions??

I looked up some common twists for both cartridges

7-08 Tompson Center = 9"
Browning - Sako = 9 1/2"
Rem,Win,Savage= 10"

7X57 Ruger =8"
Remington =9 1/4"
Savage =9 1/2"
Winchester = 8 1/2" or 8 3/4" or 10"

I would guess you would want the faster twists to shoot heavier bullets for silouette