In a bolt gun the .260 would have a bit of a advantage where you can load the bullets long and take advantage of a bit more case capacity. Plus Lapua makes brass for the 260 where as your stuck with Hornady brass for the CM.
In the gas gun the 260 gives up any case capacity advantage and it beats up brass so most folks do not use Lapua brass.
For a gas gun I am happy I went the CM route over the 260.
Bring hay for my horse....wine for my men....and mud for my turtle!
"A fear of weapons is a sign of retarded sexual and emotional maturity."
- Sigmund Freud
Originally Posted by ar15barrels
It makes it bigger and longer.