As a kid I my first bolt rifle was a Remington Model 7, 6mm Remington which I still have and use on occasion. I'm thinking of a long range 6mm build, and am having a hard time deciding between 6mm Rem and .243 Win. The rifle would be based on a stainless Remington M700 long action, and probably a 24-26" fast twist 1:7 barrel to shoot the heavier 105 to 115 grain bullets. The rifle would be used primarily for fun, target practice, coyote and deer hunting. I know the .243 has better (Lapua) brass availability but a little less powder capacity. The pros for me of the 6mm is that I have quite a bit of Remington brass on hand, reloading dies, and it should yield a little more velocity. I'd like to hear other's thoughts and opinions on this. Thanks in advance.