Thinking about making a elr 30-06 cause good speed and cheap to shoot relative to most other calibers, I will not be hunting or doing anything in that nature just range at 300 yards and going out of state to hopefully shoot past 1000 yards! So for barrel length I was thinking 30 inch cause its a 30 caliper plus gives me a little speed advantage what do you guys think might be to long? But my main concern is barrel twist cause I still need to use it for 300 yards so I might have to shoot the heavys all the time or maybe go down? Let me know any advice is help full