RE: 22-250 or .223 ranges
With the proper rifling (at least 1:7.5) the .223 fires 100 gr. bullets very well for distance. Many 1000 meter matches are held with .223 loaded with the heavier 69 to 100 gr bullet. Just remember that the standard 1:9 (typical rate for production .223 rifle) will do an average job stabilizing the longer, heavier bullet. If the rifle is setup to shoot the lighter (30-50gr) bullets at high speed, the rifling is usually toward the 1:11 or 1:12 rate, some even 1:14, this is not enough twist to stabillize the longer heavier bullet. Typically the 22-250's are rifled around the 1:12 - 1:14 rate which is designed to shoot the lighter bullets, most will not shoot the heavier 100 gr. bullets well. I have both and find advantages with both.