With the addition of the NosPart,no lead bullets,and light weight (<61gr) bullets,the 243Win is an extremely versatile chambering. More so IMO,than the 260Rem and even the 7mm-08.
It also has the short powder column accuracy over the old 6mm.
About 40 years back I had a buddy with a Rem788 (the short bbl version) chambered in 243Win. We killed tons of woodchucks and coyotes with that gun. When he deployed he would leave the gun with me,when I deployed I would leave the gun with him. This chambering,and gun,was some of my first reloading expierances.
At one time or another,I have owned about 6 or 7 243's. My most accurate was a Ruger#1V. --- SAWMAN