I've been shooting and loading for the 6mm Rem since 1975 when I purchased my first deer rifle - Rem 700ADL. Over the years we shot whitetails, jackrabbits, eastern woodchucks, western rockchucks and LOTS of paper. It probably hadn't seen more than 100 rounds of factory ammo over 45 years. Eventually, accuracy deteriorated - I just plain wore it out. I had to make a decision - rebarrel or send it down the road. I ended up taking it to Hart Barrels and had it rebarreled. Hart did a beautiful job and bedded the action in the original ADL stock. 24", satin finished, fluted, stainless.
It now shoots 1/2" or better, 5-shot groups with IMR 4350 and Barnes 80g TTSX at 3,400 fps and will accompany me Saturday on opening day of deer season.
I've owned several .243 Winchesters. All were accurate, and I hunted with all of them. While the handloaded 6mm Rem will add 100fps to an equivalent .243 Win, you simply cannot tell the difference between them in the field. Even so, my .243s are all gone and the refreshed 6mm Rem 700 will always be with me.