Originally Posted by RiverRider
I loaded .243 Win for a while. For some damned reason I could never get a consistently good shooting load, and I went through five or six rifles before theowing in the towel. The 6mm-284 dialed right in and 6mm AR was no problem. I think .243 just doesn't like me and I don't like it back. Weird.

Were you using the same brass and/or dies? Could there have been an undiagnosed bad runout problem?