For anyone interested, in this months edition of EASTMANS HUNTING JOURNAL, they did a 12 lightweight gun review..all the most notables are in there along with a Weatherby lightweight in .257. they are claiming of getting 3/4 to 1/2 in 100 yard groups with theirs.
Best of the best was again, PROOF RESEARCH ..also one of the most expensive..but hear nothing but good things about them.