I got to fire a 340 in 222 Rem earlier this year, and shot a .75 5 shot group at 100 long paces. Buddy's Dad has had it since new and shoots it maybe once every 5 or 6 six years. Usually no more than a box through when it is taken out. This one had a different looking barrel nut on it and said 340 on barrel (if I am remembering its location correctly).