I am having my 1st one built. It will be used for deer from 50 to 100 yards in Maine and in Georgia from 100 to 300 yards.

What would you recommend for barrel twist, bullet weight and type? My go to deer rifle has always been a 25-06 with 117 federal blue box. All the deer shot have dropped in their tracks.

What will I be gaining with the 257?

Can I get velocity over 3400,3500?