OK, after doing some digging into the issue, this is one webpage that I was able to find on
ballistics for the .270 Winchester. Click on the word ballistics to go to that web page. It will give you the bullet weights in grains by manufacturer as well as muzzle energy and muzzle velocity.
If you select which round you want me to work with, let me know. In the meantime, I'll see if I can get a reasonable "accuracy" value for the weapon in question, along with rifle weight etc...