I have both .223 and .308 in Remington 700 5r stainless barrel. I had the .308 first and decided to get the .223 as it would be less expensive to shoot with reduced recoil. I normally only shoot at 200 or 300 yards since that is the max at the range I belong to. The .308 is a wonderful rifle and has been easy to reload for, get on target and stay on target with superb accuracy. The .223 has been just the opposite. I have been chasing powders and bullets, trying to find something it likes. I have finally gone to, and I am starting to standardize with 68gr Hornady. I am still working up final powder type and charge. I started with 52gr BTHP (Hornady), 55gr FMJ-BT (Hrn & CamPro) and 68gr BTHP (Hrn). Went through H335, CFE223, IMR4895, H4895 and Varget with multiple ladder tests. For whatever reason the rifle does not like light projectiles. 52gr is out. 55gr is out. 68gr works but it is powder and charge sensitive. All I can think is that it is something to do with the 5r rifling in .223. Not many lands so maybe it doesn't get enough surface area contact with the lighter shorter projectiles. The longer 68gr BTHP has a larger bearing surface so it works a lot better for me, at least at 200 yards. Now, as a caveat, my accuracy demands are pretty high. If I am not well sub-MOA I am not happy. If I am sub 1/2MOA I am quite satisfied. To summarize, if I was getting one rifle to start out with, I would get a .308. Some 168 Hornady/Sierra/Berger BTHP pushed along with somewhere around 43.5gr +/- 1.0gr of Varget (do some ladder tests, your rifle will let you know what charge works best) will easily do to 600 plus yards.