I have a new Ruger Hawkeye and am getting ok accuracy - 2" - 21/2" groups at 200 yards. I was talking with one of the guys at the range and he said that neck sizing the brass would improve the accuracy. I have been full length sizing. My question is will it be enough of a difference to justify the $30 for a neck sizing die? I've been reloading for years, but have always FL sized rifle cases. Comments?