Well if you mean .30 calibers or something… not just .308 Win; I think the Poly would still work just fine. I've used it in .308 Win and .300 Win Mag with great success. I'd work with the 1-10 Poly keeping the bullet in the 150gr to 220gr range, depending again on barrel length. If I was going to build a hunter with Poly barrel in mind; I think these day's I'd go with .300 RSAUM again the 1-10 twist, I have a Pac Nor Poly on a LR using that combo and it's death ray out to 1k plus with 190gr Mk bullets, so as a hunting rifle with 150gr to 180gr or even 200gr. bullets, it should give you both power and range as a light/med hunting rifle. It's just a great cartridge with more juice and all the accuracy of the .308 Win, in the same length case as the .308 Win.
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