Worker, 1 in 12 is plenty of twist for any 53g or 55g bullet, that being said rifles seem to vary in their ability to shoot long bullets well, even though the rifleing twist may be the same. How does the new Vanguard vary from the old Vangard? Personally and without trying to be funny I liked the very old Vanguard best because it had s very tidy and good looking composite stock. Around 1995 presumably to cut costs they put a cheaper looking stock on them. Met a guy at our local rifle range who had the pre 1995 model and he let me try it out. He had just had the trigger worked by a gunsmith and that thing had the nicest trigger I have ever met.