Thanks for the replys, Yea all i could tell him was my knowledge of the calibers and their ballistics. Pretty much what has been said, Personally I'd go for the 223 due to the fact that its cheaper and easier to get. Its gonna be a varmit shooter, the 22 250 is obviously the better round for distance but the 223 is plenty for me personally
comes down to personal preference and what distance the shots will be I suppose