RE: New Rifle project, need input!
May i suggest you contact RidgeRunner - he's a member here. He has just built a custom long range rifle, and from the sounds of things - it's a humdinger. Try pm'g him and maybe get his input. He's very knowledgeable in these matters. Use my name if you wish.
Good luck with whatever you choose - it a rifle you will cherish for a long time.