TexasHunter Report post Posted July 2, 2017 I am in the beginning stages of building a .270 to shoot the burger 170 Eol bullets. My question is what would be a better choice 1.75 with 6 groove or 1.7 5r groove barrel. I am going to do a remage barrel because I want to try and do as much of the work myself as I can. That is why the selection of twist is some what limited. Share this post Link to post Share on other sites
lancetkenyon Report post Posted July 2, 2017 .270 Win? .270 WSM? Wildcat? Berger states a 1:8" recommended twist rate. Which means the slowest shooting .270 can stabilize it at sea level. Faster or higher DA only increases stability. Colder temps will decrease somewhat as well as some other very minor environmental factors like humidity. I like the 5R barrels, but think the 1:7.5" twist is a bit better rate. If they are both from reputable makers, take your pick. I think cartridge choice would help make my decision too. Right now, I am leaning toward the 1:7.5 6 groove if it is a good barrel maker. Share this post Link to post Share on other sites
TexasHunter Report post Posted July 2, 2017 it is a just a 270 no wildcat or short mag. There barrel is coming from x-caliber barrels they also offer a 9 twist 6 groove as well. Share this post Link to post Share on other sites
